Table Of Content2005. The Journal of Arachnology 33:797-812
DESCRIPTIONS OF TWO NEW SPIDER GENERA
OF TRECHALEIDAE (ARANEAE, LYCOSOIDEA)
FROM SOUTH AMERICA
James E. Carico: School of Science, Lynchburg College, 1501 Lakeside Drive,
Lynchburg, Virginia 24501 USA. E-mail: [email protected]
ABSTRACT. Two new genera in the spider family Trechaleidae, Trechaleoides and Paratrechalea, are
described. The females ofthe two known species ofTrechaleoides, T. keyserlingi(F.O.R-Cambridge) (type
species) and T. biocellata (Mello-Leitao) are redescribed and their respective males are described for the
first time; both are transferred from Trechalea. Two additional previously described species, also both
transferred from Trechalea, are herein placed in the genus Paratrechalea are redescribed from theirtypes,
i.e., the female of P. ornata (Mello-Leitao) (type species) and male of P. wygodzinskyi (Soares & Ca-
margo). The male of P. ornata is described for the first time. Four new species of Paratrechalea, P.
longigaster, P. galianoae, and P. azul from females, and P. saopaulo from males and females are de-
scribed. The immature specimenhistorically regarded as theholotype ofTrechalea longitarsis (C.L. Koch)
and regarded as a mistaken identity, is an unidentified species of Trechaleoides. The female holotype of
Trechalea limai Mello-Leitao is confirmed to be lost but is considered to be a member of the genus
Paratrechalea based on a study of the original description.
Keywords! Trechaleidae, Trechaleoides, Paratrechalea, new genera, new species
Since the reintroduction of Simon’s (1890) ea, and no other genus identified in the family,
family Trechaleidae (Carico 1986), its validity the characteristic ofhaving only the tarsi flex-
has been confirmed through the workofothers ible. However, the characteristics of the gen-
(Sierwald 1990 [Trechaleidae not recognized italia clearly distinguish these new genera
but acknowledged as a distinct "'Trechalea from each other as well as from Trechalea. To
&
genus-group”], 1993, 1997; Coddington distinguish the males from those ofTrechalea,
Levi 1991 [cladistic analysis]; Griswold 1993 the median apophysis of the palpal bulb (Fig.
[cladistic analysis]). Beginning with the re- 1) has a less complex ventral division in the
definition of the family along with a revision former species. Additional features of this
ofits type genus Trechalea Thorell 1869 (Car- structure, detailed below, will distinguish be-
ico 1993), the goal was to reveal the taxono- tween the new genera. In females ofthese new
my of the remaining members of this unique genera, a typical middle field of the female
family through revisions of the included gen- epigynum (Figs. 6, 20), present in Trechalea
era. The current work represents an additional is absent; instead, there is apronounced scape.
step towards this goal. Internally the notable differences with Tre-
In this work, two new genera are erected to chalea are that the spermathecae are free and
include species (specified below) that were that pairs of diverticula (rather than only one)
previously placed into Trechalea and addi- arise from a common chamber. Additional de-
tionally to contain species not previously de- tails of the external and internal structures of
scribed. In the process of defining these gen- the female genitalia, as reported below, will
era, references are made to characters used in distinguish between the new genera.
the previously mentioned study of the genus Little is known about the biology of rep-
Trechalea in order to further develop and re- resentatives of these genera. However, there
fine a set ofcharacters that will ultimately dis- are indications from fragmentary evidence
tinguish among all the closely-related mono- that these genera share a feature with Tre-
phyletic genera of the family {sensu Carico chalea, i.e., they apparently occupy a semi-
1993). aquatic habitat based on references to place
These two new genera share with TrechaT names ofstreams on the collection labels. The
797
798 THE JOURNAL OF ARACHNOLOGY
—
—
Figure 3. Distribution of species of Trechalea-
Figures 1, 2. Diagrammatic genitalia of Tre~
ides.
chaleoides and Paratrechalea. 1. right palpus, ven-
tral view; 2. internal structures offemale genitalia.
(Abbreviations explained in text) analysis of the description of T. limai reveals
that it is a species nomen dubium in the genus
Paratrechalea. Trechalea syntrechaleoides,
unique structure ofthe egg sac and manner of however, is not congeneric with the genera in
carrying the spiderlings on it while attached this report, and its status will be treated else-
to the spinnerets, first described for Trechalea where in a separate generic revision.
extensa (O.R-Cambridge) by Berkum (1982), The nomenclature ofthe genitalia and other
is apparently also confirmed as a characteristic anatomical features follow Carico (1993 [gen-
ofthe family. This conclusion derives from an italic terminology after Sierwald 1989,
assumption that the details of the egg sac’s 1990]). Because of its rigidity and relative re-
structure, as described by Carico (1993) for sistance to distortion, carapace length is em-
Trechalea and presumed to be a family trait, phasized as an index ofbody size, particularly
is consistent with the structure of egg sacs in discussions ofvariation. Measurements and
found with specimens of the new genera. scales are in millimeters.
The distributions of these two genera over- Specimens examined during this study are
lap in a region of South America between lodged in the following museums: Museu de
15°S and 35°S latitude, an area which includes Zoologica da Universidad de Sao Paulo
regions of southern Brazil, northern Argenti- (MZUSP); Museum of Comparative Zoology,
na, and Paraguay and is locally known as the Harvard (MCZ); Natural History Museum,
“Cone Sul” (Southern Cone). Therefore, it London (BMNH); Museu de Ciencias Natu-
appears that their distribution is primarily re- rais, Porto Alegre (MCN); Museo Argentina
lated to streams ofthe lower Rio la Plata river de Ciencias Naturales, Buenos Aires
basin and the several smaller coastal streams. (MACN); Museo Nacional de Historia Natu-
From a preliminary overview of the distribu- ral, Montevideo (MNHN); Museo de la Univ-
tions of all trechaleid genera in South Amer- ersidad Nacional de la Plata (MLP); Museu
ica, the two new genera considered herein Nacional, Rio de Janeiro (MNRJ); Universi-
may be the predominant representatives ofthe dade Federal do Rio Grande do Sul, Porto
family in this region. Two species of Mello- Alegre (UFRGS), and Peabody Museum of
Leitao from this region, Trechalea limai Mel- Natural History, New Haven (PMNH).
lo-Leitao 1941 and T. syntrechaleoides MqWo- Trechaleoides new genus
Leitao 1941, whose types were previously —
unobtainable from the Museu Nacional, Rio Type species. Trechalea keyserlingi
de Janeiro during a previous study (Carico FO.P-Cambrid—ge 1903.
1993) were never the less regarded to be mis- Etymology. The feminine generic name
placed in Trechalea. Recently, access to these indicates its relationship with the genus Tre-
specimens was obtained resulting in a conclu- chalea. —
sion that T. limai is lost and probably de- Diagnosis. Trechaleoides can be distin-
stroyed (A.B. Kury pers. comm.). Careful guished from all other described genera of
CARICO—TWO NEW GENERA OF TRECHALEIDAE 799
Trechaleidae (sensu Carico 1993) by a com-
bination of characters. In the male palpus, the
ventral division (vd) of the median apophysis
(ma) is a simple, small, rounded projection
rather than angular, and the guide (g) is con-
spicuous, more slender and tapered than in
Trechalea and Hesydrus. The ventral division
is also simplified and rounded in Paratre-
chalea but it is much expanded there. The epi-
gynum is distinguished by a pair ofsmall pos-
terio-lateral projections separated by sutures
from the middle anterior field, and by details
of the internal female genitalia including a
A
posterio-median hood-like chamber. small
retromarginal tooth is adjacent to the most
proximal tooth and offset into the fang furrow.
These are relatively large spiders with the car-
apace length ran—ging from b.l-ll.O.
Description. Carapace moderately low,
cephalic area not distinct, AE row straight or —
slightly recurved. Each basal segment ofmale Figures 4-7. GenitaliaofTrechaleoideskeyser-
chelicera not swollen anteriorly and without a lingi. 4, 5. right palpus; 4. ventral view, 5. retrola-
claetnetrearl ocanreinal;argpersto,marfigvienarlettreoemtahrgtihnraele tweietthh dt7eu.rcadtlo,rvsfiadelw=v;ife6ew,r,t7i.alfifza=etmiaaonnlteedrugiceotnr,itfhaileil=ad,;hc6od.odv=,enchtosrpaul=lavhtieoearwd,y
(occasionally four) with a smaller tooth offset of spermathecum, mf = middle field.
between the proximal two into the fang fur-
row. Leg lengths variable butIII always short-
est while others often subequal, only tarsi ulatory duct (cd) and fertilization duct (fd)
flexible, all claws dentate, paired ventral ma- arising from this common chamber; large,
crosetae on tibia. hood-shaped structure (h) located posterio-
Male palpal bulb (Fig. 1) median apophysis medially. —
(ma) with distal, curved sickle-shaped dorsal Natural history. Egg sacs show the basic
division (dd) narrow, tapered, with tip con- trechaleid construction as described for Tre-
spicuous, and directed ventrad, a small, round- chalea (Carico 1993, fig, 6), i.e., a flattened
ed ventral division (vd) of variable size but disc with a peripheral “skirt”. The aquatic
shape distinctive for each species; retrolateral habitat preference is suggested by the refer-
tibial apophysis (rta) arising distally and lat- ence to “Arroyo” or “Rio” on some collec-
erally from nearthe ventro-distal rim (vr) with tion labels and is consistent with what is
ectal division (ecd) divided into two subdivi- known ofother genera, i.e.; Trechalea (Carico
sions, dorsal one longer and curved and ental 1993), Hesydrus (pers. obs.), and Paradossen-
division (end) partly surrounded by ventral us F.O.R-Cambridge 1903 (Brescovit et al.
cymbio-tibial membrane (vcm); tibial ventral 2000). —
rim (vr) of ventral protuberance (vp) folded Distribution. Found in South America
over to create a particularly deep depression southward from the Brazilian state of Minas
in the ventral cymbio-tibial membrane (vcm). Gerais into Paraguay, northern Argentina, and
The epigynum (Fig. 6) is a slightly convex, Uruguay (Fig—. 3).
nearly circular anterior field (af) with pair of Remarks. The specimen mistakenly re-
small projections at posterior margin whose gardedby FO.P.-Cambridge (1903) as the type
long axes tend to transverse, middle field (mf) of Trechalea longitarsis is actually an imma-
absent; internally (Figs. 2, 7) the stalked sper- ture female of this new genus (Carico 1993)
mathecum head (hs) large and not attached to as indicated by the unique characters ofretro-
other components; a pair ofdiverticula arising marginal teeth of the chelicerae, particularly
from a large common chamber (probably en- by the presence of a small tooth placed into
larged portion of copulatory duct), both cop- the fang furrow between the proximal two
800 THE JOURNAL OF ARACHNOLOGY
larger teeth. Although the typical number of cluster of bristles posterior to each PLE, eye
retromarginal teeth is five, there are specimens measurements in Table 1. Cheliceral faces me-
which have four on one of the chelicera. The dium reddish-brown, each with a dark longi-
locality label with that specimen, “Brazil,” is tudinal band clothed with scattered light and
also consistent with the location ofthis genus. dark hairs, five retromarginal teeth, subequal
Because of immaturity and the general poor in size except smaller fifth one between first
condition of this specimen, it cannot be con- and third offset into the fang groove. Legs II-
fidently attributed to any of the species rec- IV-I-III, measurements in Table 2, ventral ma-
ognized in this work. crosetae pairs on tibiae 1-4, II-4, III-3, IV-3.
Color of legs medium brown, marked only
Trechaleoides keyserlingi
with faint maculae on dorsum of each femur.
(EO.P.-Cambridge 1903) Abdomen hairless above (probably rubbed)
Figs. 3-7
with distinct dorsal pattern, length 8.0. Palpus
Trechalea keyserlingi EO.P.-Cambridge 1903:163, (Figs. 4, 5) tibia length approximately half
plate 15, figs. 1, 2; Roewer 1954:142; Bonnet length of cymbium, bulb t and st prominent,
1959:4679; Petrunkevitch 1911:549; Carico vd of ma flattened, moderate-sized, rounded
1993:237 (non Trechalea)', Platnick 2004.
— in outline, and not covering the dd, ecd ofrta
Type material. Holotype female, Rio prominent and angular.
Grande do Sul, Brazil, Keyserling (BMNH, Female (holotype): Carapace light with
examined). — submarginal bands, broad dark median band
Material examined. ARGENTINA: Tu- divided longitudinally by a narrow median
cumdn: San Pedro de Colalao, 26°22'S, band widened between eyes and thoracic
65°57'W, March 1967, A. Barrio, 1 $ grooves, length 9.0, width 8.2. Sternum un-
(MACN); Misiones: Puali, 27°00'S, 55°00'W, marked, length 5.0, width 4.2; labium length
Sciap, J. Carlo?, 1 9 (MACN). BRAZIL: Rio 1.65, width 1.60. Clypeus dark medially and
Grande do Sul: Sao Jeronimo-Fazenda Casa light laterally, height 1.11, width 2.84. Ante-
Branca, 29°58'S, 51°43'W, 20-21 May 1982, rior eye row slightly recurved, eye measure-
J.E. Hennig, 1 c3 (MCN #10373); Sao Leo- ments in Table 1. Chelicerae dark and clothed
poldo, 29°46'S, 51°09'W, 25 March 1983, C.J. with light hair, three promarginal teeth, five
Becker, 1 (3 (MCN #11517); no locality, 28 retromarginal teeth on right side and five on
October 1981, A.A. Lise, 1 9 (MCN #9955); left, the smallest ones next to the most prox-
state unknown, 22 November 1987, A.D. imal teeth. Legs IV-II-LIII, measurements in
Brescovit, 2 9 (MCN #17222). PARAGUAY: Table 3, femora with irregular dark maculae,
near Pedro Juan Caballero, 23°00'S, 56°00'W, all other segments dark; tarsi flexible, spines
25-27 November 1956, C.J.D. Brown, 1 9 not longer than one-third of respective seg-
(MCZ). URUGUAY: Salto: Rio Arapey, ment. Abdomen dark median band with dis-
30°55'S, 57°49'W, 13 December 1954, collec- tinct lateral indentations in the posterior third,
tor unknown,—1 9 (MNHN). sides light with scattered maculae, venterlight
Diagnosis. Females of this species are length 11.0. Pair ofsmooth projections atpos-
distinguished by the pair of posterior protu- terior margin of epigynum (Figs. 6, 7), inter-
berances of the epigynum which are smooth nal structures—as for genus.
and not folded, and males by the palpal tibia Variation. Carapace length of males av-
which is approximately half the length of the erage 7.17 (6.6-7.9, n = 3) and of females
cymbium. — 7.13 (6.1-8.8, n = 10). Dorsal pattern similar
Description. Male (Sao Jeronimo, Rio in both sexes with l—ittle variation noted.
Grande do Sul, Brazil): Carapace medium Natural history. An egg sac from near
brown with wide submarginal light bands, Pedro Juan Caballero, Paraguay, collected late
dark marginal bands widening posteriorly, November, measured 15.0.
black in eye region, length 7,9, width 7.0, Distribution.—Northern Argentina, eastern
Sternum light, with median dusky band on an- tributaries ofRio Parana in southern Paraguay
terior two-thirds, length 4.2, width 3.7; labium and southern Brazil. Also, in some coastal
reddish-brown, lighter at distal margin, length drainages of—southern Brazil (Fig. 3).
1.57, width 1.30. Clypeus height 0.88, width Remarks. According to FO.P.-Cambridge
3.20. Anterior eye row slightly recurved, a (1903), the type specimen was originally iden-
5 1 it
CARICO—TWO NEW GENERA OF TRECHALEIDAE 801
Q o
s s §oa, VdrO- VdO dCO VdOO' odVO cdCnO dcn Vd5—O1 0d'—01 mod dCV| od 5cd—m
s
? o
5 ^ aI- dCrG- din do dOOl' VdCNO cdmn dcnn dn5—1 5dO-vH dm dO' Od cd5—m
s
^ o m m o
' O' VO M oTO
ON din dOv d d tdn d 5d=^ d d d d
o n o o
.2 ® |Wfni*l^ md S VdO c«dn dO' icdnn VcdOn dT— €<CdiN| cdn dcm VodO d
6*3 o o in in n in O' cn « ToO ToO
0+ GdO d dO' VdO d OdQ d d cdn d d d
« o
g
o
d d
oVOv id0n0 qcn od\ dd din d dVO cdinn dO' doVO doVO
i R
5
o m o o
l-i md d 5d d idn VOdJO dO' idn dO' €<dcin cdm iodn cdn
^ S -
fi W a, |§ Odrv- od 5d cdon Sd Cdt^nl odcn VdO Odl-'H odcn odcm cdon d
-Q « ^ £
o S ^-S o d m m
. in VdOO' d00 rqo idinn din dm Odc'n diinn dcn idT—n dOv
Q ^.0
"o
5 ^
^ ^ o o m o o
K. ~ d td=H od\ idn q VdO cidnn CdM VcdOn i1 11 1i 1
S .2
0
w S So
jS ^§ ^-S o od dtC-'HJ dao\ qin qO' VodO ndOv cdon OcdnV doO' cdcmn dVO do
J s>
•5 ^
^13111-S ^ od \ddD mdO' md VqO odin odn dO' dccnn dO' idcnm d5—1 dO5—'1
f=H
W
W W
i
<
wa wa <aa0.affi W wd WS dwd d md m
< o o O ^ < < d <
802 THE JOURNAL OF ARACHNOLOGY
—
Table 2. Leg measurements of Trechaleoides
keyserlingi male in mm.
Leg segment I II III IV
Femur 9.5 9.75 7.5 9.5
Tibia-patella 13.0 13.0 9.5 12.3
Metatarsus 10.3 10.4 7.8 11.6
Tarsus 7.4 8.1 4.2 7.4
Total 40.2 41.25 29.0 40.8
tified by Keyserling (1891) as Trechalea Ion-
gitarsis (C.L. Koch 1848). However, the for=
mer recognized that the five retromarginal
teeth ofthe chelicera and the shape ofthe epi-
gynum clearly distinguish this species from
the Koch species. It is these same characters,
which, among others, also define the new ge-
nus, Trechaleoides.
Trechaleoides biocellata (Mello-Leitao 1926)
NEW COMBINATION
Figs. 3, 8-12
—
Trechalea biocellata Mello-Leitao 1926:3; Roewer Figures 8-11. Genitalia of Trechaleoides bio-
1954:142; Bonnet 1959:4678; Platnick 2004. cellata. 8, 9. right palpus; 8. ventral view, 9. retro-
—
Type material. Holotype female, Santa lateral view; 10, 11. female genitalia; 10. ventral
view, 11. dorsal view.
Catharina e Petropolis, Rio de Janeiro, Brazil,
Fr. Thomaz Borgmeyer (MNRJ, presumed
lost, not examined) — Viamao, near Porto Alegre, 30°05'S, 5r02'W,
Material examined. ARGENTINA: Mi- 22 March 1975, A.A. Lise, 1 S (MCN
siones: Paulitz(?), 27°00'S, 55°00'W, 1954, #02537); Garruchos Sao Borja, 28°irS,
Schiapelli & De Carlo?, 1 6 (MACN); no lo- 55°39'W, 10 December 1975, A.A. Lise, 3 6,
cality, November 1954, Scial. Corio?, 1 6 3 9 (MCN #3245); Arroio do Meio, Linha
(MACN). BRAZIL: Rio Grande do Sul: Itu- Alegre, 9 January 1985, A.A. Lise, 1 S (MCN
aba-Arroio do Tigre, 29°20'S, 53°06'W, 11 #13019). PARAGUAY: near Piribebuy, Ar-
April 1978, A.A. Lise, 1 d (MCN #7928); royo Pirareta, 25°29'S, 57°03'W, 13 December
same locality, 12 April 1978, A.A. Lise, 1 9 1956, C.J.D. —Brown, 1 9 (MCZ).
(MCN #7978); same locality, 12 April 1978, Diagnosis. This species is distinguished
C.J. Becker, 19,1 juvenile (MCN #7904); by characteristics of the genitalia. The pair of
same locality, 17 April 1978, A.A. Lise, 1 6, posterior projections of the epigynum are
5 juveniles (MCN #7978); Estreito Augusto folded and not smooth, and the palpal tibia is
Cesar, Marcelino Ramos, 3 February, 1990, C. approximately equal to the length ofthe cym-
Martinazzo, 1 d, 1 juvenile (MCN #19532); bium.
— —
Table 3. Leg measurements of Trechaleoides Table 4. Leg measurements of Trechaleoides
keyserlingi female in mm. biocellata male in mm.
Leg segment I II III IV Leg segment I II III IV
Femur 11.1 11.6 9.5 11.6 Femur 11.9 12.6 9.3 12.1
Tibia-patella 15.0 14.8 11.0 14.2 Tibia-patella 16.5 16.7 11.5 15.1
Metatarsus 10.8 10.1 9.0 13.3 Metatarsus 12.7 14.3 9.0 14.3
Tarsus 8.0 8.1 5.0 8.5 Tarsus 9.7 9.0 5.2 9.6
Total 44.9 44.6 34.5 47.6 Total 50.8 52.6 35.0 51.1
——
CARICO—-TWO NEW GENERA OF TRECHALEIDAE 803
—
Table 5. Leg measurements of Trechaleoides light marks at anterior and lateral edges; sides
biocellata female in mm. Leg I missing. with irregular, parallel dark marks, venter un-
marked, length 8.6. Pair of protuberances at
Leg segment —I II III IV posterior margin of epigynum (Figs. 10, 11)
Femur — 13.5 10.5 13.2 with irregularfolds and creases, internal struc-
Tibia-patella — 17.0 12.6 15.3 tures as for g—enus.
Metatarsus — 13.0 10.8 16.7 Variation. -Carapace length of males av-
Tarsus — 8.5 6.2 9.6 erage 7.72 (7.2-8.6, « — 13) and of females
Total 52.0 40.1 54.8 9.2 (7.2-11.0, n = 6). Average abdominal
lengths equal 0.93 of carapace lengths in
— males and 0.97 in females. Dorsal pattern sim-
Description, Male (Misiones, Argentina): ilar in both sexes wi—th little variation noted.
Carapace medium brown with wide submar- Natural history. See generic description.
ginal light bands, marginal bands widening Distribution.- -Eastern tributaries of Rio
posteriorly, black in eye region, length 7.9, Parana in northern Argentina, southern Para-
width 7.0. Sternum light, unmarked, length guay, and southern Brazil. Also some coastal
4.2, width 3,7; labium reddish-brown, lighter drainages of southern Brazil (Fig. 3).
at distal margin, length 1.57, width 1.30. Remarks.-—The female described above
Ciypeus height 0.88, width 3.20. Anterior eye from the Museu Nacioeal do Rio de Janeiro,
row slightly recurved, aclusterofbristles pos- was identified by Mello-Leitao as Trechalea
teriorto each PLE, eye measurements in Table biocellata and is assumed to be the name
1. Cheliceral faces medium reddish-brown, bearer for the purposes of this report. I am
each with a dark longitudinal band clothed reluctant to designate it as a eeotype in view
with scattered light and dark hairs, five retro- of the possibilities that the original holotype
marginal teeth, subequal in size except smaller might be found in the future.
fifth one between first and third offset into the
fang groove. Legs II-IV-I~III, measurements in Paratrechalea new genus
Table 4, ventral macrosetae pairs on tibiae are
I-4, II-4, III-3, IV-3. Color of legs medium Type species.- Trechalea ornata Mello-
brown, marked only with faint maculae on Leitao 1943.
dorsum of each femur. Abdomen hairless Etymology.—The feminine Latin generic
above (probably rubbed), with distinct dorsal name indicates the relationship with the genus
pattern, length 8.0. Palpus (Figs. 8, 9) tibia Trechalea.
length approximately equal to length of cym- Paratrechalea can be distin-
bium, bulb t and stprominent, vd ofma small, guished from all other described genera of
flattened, rounded in outline, and not covering Trechaleidae (sensu Carico 1993) by a com-
dd, ecd of rta prominent and angular. bination of characters. In the male palpus the
Female (Paineiras, Brazil [substitute for ventral division (vd) of the mediae apophysis
holotype, see note below]): Carapace (Fig. 12) (ma) is flattened, rounded in outline, and
light brown with irregular submargieal lighter greatly expanded to mostly obstruct the dorsal
bands; irregular light marks between PE and division including its guide (g). The epigynum
thoracic groove, length 8.5, width 7.8. Ster- is distinguished by the presence of a conspic-
num light yellow, unmarked, length 4.5, width uous external posterio-mediae scape. These
3.6; labium light brown, unmarked, length are moderate-sized spiders with the carapace
1.80, width 1.60. Ciypeus with faint darker length ranging 3.3-3.8 except for the male of
marks beneath PLE and AE, height 0.86, P. wygodzinskyi which is 5.2.
width 3.5. Anterior eye row straight, eye mea- Description,—Carapace moderately low,
surements in Table 1. Chelicerae reddish cephalic area relatively distinct, AE row
brown, five retromarginal teeth, subequal in straight. Each basal segment ofmale chelicera
size with smallest one subproximal. Legs: IV- swollen anteriorly with lateral carina on distal
II-II (I missing), measurem.e]nts in Table 5, half (except P. wygodzinskyi); three promar-
yellow with irregular and indistinct darker ginal teeth with center one largest, three, four
marks on dorsal surfaces of femora, tibiae. or five retromarginal teeth, variable in size and
Abdomen mid-dorsal dark band distinct with ieterdistaece. Leg lengths variable but III al-
THE JOURNAL OF ARACHNOLOGY
804
CARICO—TWO NEW GENERA OF TRECHALEIDAE 805
ways shortest while others often subequal,
only tarsi flexible, all claws dentate.
Male palpal bulb (Fig. 1) with tip of distal,
curved sickle-shaped dorsal division (dd) of
median apophysis (ma) directed ventrad and
obscured by broad, rounded ventral division
(vd); retrolateral tibial apophysis (rta) arising
distally and laterally from near the ventrod-
istal rim (vr) with ectal division (ecd) curved
and ental division (end) partly surrounded by
ventral cymbio-tibial membrane (vcm); tibial
ventral rim (vr) of ventral protuberance (vp)
folded over to create deep depression in ven-
tral cymbio-tibial membrane (vcm). Nearly
circular anterior field (af) of epigynum slight-
ly convex, a single prominent posterio-median
scape; dorsal aspect, on each side of the fe-
male genitalia (Fig. 21) with large, free,
stalked, spermathecal head (hs); two divertic-
ula arising from large common chamber
(probably an extension of copulatory duct);
large, hood-shaped structure (h) located pos-
terio-medially; copulatory duct (cd) and fer-
tilization duct (fd) arising from common —
chamber. Figure 17. Distribution of species of Paratre-
—
Natural history. The aquatic habitatpref- chalea.
erence is suggested by the reference to “Ar-
royo” or “Rio” on some collection labels and
is consistent with what is known of other tre- of the genus Paratrechalea. Because of the
chaleid genera. — inability to determine the relationship of this
Distribution. Found in South America species to others in the genus, I have deter-
southward from the Brazilian state of Mato mined that it should remain as a nomen du-
Grosso through northern Argentina into Uru- bium until and if the holotype is ever recov-
guay (Fig. 17). — ered.
Nomen dubium. Unlike many of Mello-
Paratrechalea ornata (Mello-Leitao 1943)
Leitao’s species descriptions, the one for T. NEW COMBINATION
limai Mello-Leitao 1941 was relatively com- Figs. 13, 14, 17-21
plete and was accompaniedby drawings ofthe
habitus and epigynum. Unfortunately the epi- Trechalea ornata Mello-Leitao 1943:107, fig. 7;
Roewer 1954:143; Platnick 2004.
gynum drawing was not diagnosable at either —
the generic or species level. The habitus was Type material. -Holotype female, Bosque
helpful however and when combined with the Alegre, Cordoba, Argentina, 31°35'S,
description, it is possible to determine the ge- 64°34'W, January-March 1940, M. Biraben
nus with some confidence. Specifically this (MLP #15690, examined).
decision is based upon body length, number Material examined.—ARGENTINA: Mi-
of macrosetae pairs on the tibiae, relative siones: Isla Maria, 27°00'S, 55°00'W, Novem-
length of the legs, and geographic location. ber 1954, Schiapella?, 1 $ (MACN); Cordo-
Therefore, I believe that T. limai is a member ba: Santa Rosa, Dept, de Calamuchita,
—
Figures—12-16.- Dorsal patterns of species of Trechaleoides and Paratrechalea. 12. T. biocellata fe-
male; 13 16. Paratrechalea: 13, 14. P. ornata: 13. male; 14. female; 15. P. longigaster female; 16. P.
galianoae female.
—
806 THE JOURNAL OF ARACHNOLOGY
—
Table 6. Leg measurements of Paratrechalea
ornata male in mm.
Leg segment I II III IV
Femur 4.0 4.2 3.3 4.5
Tibia-patella 5.5 5.6 4.0 5.7
Metatarsus 4.2 4.2 3.0 5.2
Tarsus 2.2 2.4 1.5 2.6
Total 15.9 16.4 11.8 18.0
Gambardella, 33°19'S, 54°42'W, 1 9
(MNHN); Paysandu: Santa Rita, R. Uruguay,
8 November 1955, collector unknown, 1 9
(MNHN); Salto, Rio Arapey, 30°55'S,
57°49'W, 13 December 1954, collector un-
known, 1 9 (MNHN); Maldonado: Sa. De las
Animas, 34°42'S, 55°19'W, 18 May 1989, R.
Capocasale, F. Costa, 1 d, 1 9 (MNHN).
Diagnosis. This species is distinguished
—
Figures 18-21. Genitalia of Paratrechalea or- by the small body size and details ofthe gen-
nata. 18, 19. right palpus; 18. ventral view, 19. re- italia. The broad median scape of the epigyn-
trolateral view; 20, 21. female genitalia; 20. ventral um has a median concavity. The male palpal
view, 21. dorsal view, af = anteriorfield, cd = cop- tibia is approximately half the length of the
ulatory duct, fd = fertilization duct, hs = head of cymbium but with a large rta. On the palpal
spermathecum. bulb the vd of the ma is much expanded so
that the tip of the g is out of view from the
32°04'S, 64°33'W, February 1952, M.J. Viana, ventral side. —
2 9 (MACN); Buenos Aires: Arroyo Pararito, Description. Male (Argentina, Arroyo de
Delta del Parana, Partido do Tigre, 34°25'S, la Moras, Provincia Buenos Aires): Carapace
58°35'W, 29 November 1953, A.O. Bachman, (Fig. 13) moderately high, cephalic area not
1 d, 2 9,7juveniles (MACN); same locality, elevated, medium brown with wide submar-
October 1954, A.O. Bachman, 3 9 (MACN); ginal light band, marginal bands widening
same locality, 1 November 1953, A.O. Bach- posteriorly, black in eye region, length 3.3,
man, 3 d, 6 9,4 juveniles (MACN); same width 3.0. Sternum light, unmarked, length
locality, 26 December 1953, A.O. Bachman, 1.72, width 1.80; labium reddish-brown, ligh-
2 9 (MACN), 8 March 1953, A.O. Bachman, ter at distal margin, length 0.60, width 0.60.
1 9,(MACN); same locality, 18 October 1953, Clypeus height 0.30, width 1.70. Anterior eye
A.O. Bachman, 2 d, 7juveniles (MACN); Ar- row slightly recurved, eye measurements in
royo, Carancho, Delta del Parana, 36°12'S, Table 1. Cheliceral faces swollen, glabrous,
58°10'W, 6 January 1952, A.O. Bachman, 3 yellowish, lateral longitudinal carinae present,
9 (MACN); Arroyo Correa, near San Antonio four retromarginal teeth subequal in size ex-
River, Delta del Parana, Partido de Tigre, cept smallest subproximal. Legs IV-II-I-III,
34°25'S, 58°35'W, 2 March 1951, A.O. Bach-
man, 1 9 (MACN); Arroyo de las Moras, Del- —
ta del Parana, Partido de Tigre, 34°25'S, Table 7. Leg measurements of Paratrechalea
58°35'W, 3 February 1955, A.O. Bachman, 3 ornata female in mm.
9 (MACN). BRAZIL: Parana: Rio Bronco
do Sul, 4°10'N, 60°47'W, 16 April 1987, A.D. Leg segment I II III IV
Brescovit, 1 9 (MCN #17153); Rio Grande Femur 4.3 4.5 3.6 5.0
do Sul: Caxias do Sul, Aqua Azul, 27°23'S, Tibia-patella 5.6 5.7 4.0 5.9
52°25'W, 15 January 1975, A.A. Lise, 1 9 Metatarsus 4.1 4.1 3.1 5.3
(MCN). URUGUAY: Treinta-y-Tres: Arroyo Tarsus 2.3 2.2 1.5 2.4
Total 16.3 16.5 12,2 18.6
Verbal, 33°19'S, 54°42'W, 7 January 1963,
