Chaco castanea

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This page should be cited as follows (rationale):
Oca L, Pérez-Miles F (2013) Two new species of Chaco Tullgren from the Atlantic coast of Uruguay (Araneae, Mygalomorphae, Nemesiidae). ZooKeys 337 : 73–87, doi. Versioned wiki page: 2013-10-01, version 38014, https://species-id.net/w/index.php?title=Chaco_castanea&oldid=38014 , contributors (alphabetical order): Pensoft Publishers.

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BibTeX:

@article{Oca2013ZooKeys337,
author = {Oca, Laura Montes de AND Pérez-Miles, Fernando},
journal = {ZooKeys},
publisher = {Pensoft Publishers},
title = {Two new species of Chaco Tullgren from the Atlantic coast of Uruguay (Araneae, Mygalomorphae, Nemesiidae)},
year = {2013},
volume = {337},
issue = {},
pages = {73--87},
doi = {10.3897/zookeys.337.5779},
url = {http://www.pensoft.net/journals/zookeys/article/5779/abstract},
note = {Versioned wiki page: 2013-10-01, version 38014, https://species-id.net/w/index.php?title=Chaco_castanea&oldid=38014 , contributors (alphabetical order): Pensoft Publishers.}

}

RIS/ Endnote:

TY - JOUR
T1 - Two new species of Chaco Tullgren from the Atlantic coast of Uruguay (Araneae, Mygalomorphae, Nemesiidae)
A1 - Oca L
A1 - Pérez-Miles F
Y1 - 2013
JF - ZooKeys
JA -
VL - 337
IS -
UR - http://dx.doi.org/10.3897/zookeys.337.5779
SP - 73
EP - 87
PB - Pensoft Publishers
M1 - Versioned wiki page: 2013-10-01, version 38014, https://species-id.net/w/index.php?title=Chaco_castanea&oldid=38014 , contributors (alphabetical order): Pensoft Publishers.

M3 - doi:10.3897/zookeys.337.5779

Wikipedia/ Citizendium:

<ref name="Oca2013ZooKeys337">{{Citation
| author = Oca L, Pérez-Miles F
| title = Two new species of Chaco Tullgren from the Atlantic coast of Uruguay (Araneae, Mygalomorphae, Nemesiidae)
| journal = ZooKeys
| year = 2013
| volume = 337
| issue =
| pages = 73--87
| pmid =
| publisher = Pensoft Publishers
| doi = 10.3897/zookeys.337.5779
| url = http://www.pensoft.net/journals/zookeys/article/5779/abstract
| pmc =
| accessdate = 2024-12-23

}} Versioned wiki page: 2013-10-01, version 38014, https://species-id.net/w/index.php?title=Chaco_castanea&oldid=38014 , contributors (alphabetical order): Pensoft Publishers.</ref>

See also the citation download page at the journal.


Taxonavigation

Ordo: Araneae
Familia: Nemesiidae
Genus: Chaco

Name

Chaco castanea Oca & Pérez-Miles, 2013 sp. n.Wikispecies linkZooBank linkPensoft Profile

Types

Male holotype (deposited in FCE-MY 0767) from, Rocha, Perla de Rocha, 34°25.0'S, 53°51.0'W, i.2001, coll. G. Calixto Female paratype (deposited in FCE-MY 0770) from Rocha, Cabo Polonio, 34°24.0'S, 53°47.0'W, 24.i–18.iii.2003, coll. F. Achaval. Additional material examined. Male from Rocha, Cabo Polonio, 19.xii.2003–18.iii.2004, coll. F. Achaval. 1m (deposited in FCE-MY 0769), Female from Rocha, Perla de Rocha, 34°25.0'S, 53°51.0'W, i.2001, coll. G. Calixto, 1f (FCE-MY 0766), female from Rocha, Cabo Polonio, 34°24.0'S, 53°47.0'W, 18.i–18.iii.2005, coll. F. Achaval, 1f (deposited in FCE-MY 0797).

Etymology

The specific epithet is a noun taken in apposition (chestnut) and is in reference to the brownish coloration of this species.
Diagnosis. Males (Fig. 1A) uniquely possess a tibial apophysis with 4 spines (Fig. 3D). Chaco castanea males differ from Chaco tigre and Chaco socos males by having a palpal organ with a sinuous spermophor and parallel longitudinal ridges (Figs 3A–C), and by having a PME and AME that are subequal in diameter. Females of Chaco castanea (Fig. 1C) differ from the other known Chaco species by the presence of a large reniform spermathecal receptacle in combination with a short sinuous duct (Fig. 3E).

Description

Male (holotype). Total length 7.75; carapace 4.13 long, 3.27 wide; eight eyes grouped on a tubercle, AME 0.17; PME 0.13; ALE 0.16; PLE 0.16; OQ 0.86 long, 0.44 wide; clypeus 0.06; fovea 0.63; sternum oval, 1.93 long, 1.56 wide. Posterior sigillae sub-circular, sub-marginal. Labium sub-rectangular, 0.2 long, 0.56 wide; labial cuspules absent; 18/20 maxillary cuspules (Fig. 1B); chelicerae with 7 promarginal teeth of similar size; rastellum with 26 short, thick conical setae on promargin narrowing through retromargin. Leg, palpal measurements in Table 2; chaetotaxy in Table 3. Tarsus I-IV scopula entire; metatarsi I-II distal third, III-IV absent. Anterior tibiae without scopula. STC with numerous teeth in two lateral rows. ITC I-IV absent. Claw tufts absent. Tibial apophysis with 4 prolateral apical spines (Fig. 3D). Palpal organ spermophor strongly sinuous (Figs 3A–C). Four spinnerets, PMS short monoarticulated, PLS triarticulated apical article short, domed. Spigots without pumpkin-like socket. Body, legs light brown, abdomen with dark brown spots.
Female (paratype). Total length 18.2; carapace 7.2 long, 5.6 wide; caput raised; eight eyes grouped on a tubercle, AME 0.24; PME 0.25; ALE 0.36; PLE 0.31; OQ 0.75 long, 1.6 wide; clypeus 0.14; fovea 0.9; sternum oval, 2.3 long, 2.2 wide. Posterior sigillae sub-circular, sub-marginal. Labium sub-rectangular, 0.7 long, 1.3 wide; 1 labial cuspule; maxillary cuspules 48/62 (Fig. 1D). Chelicerae with 6 promarginal teeth; first tooth smaller than second, decreasing thereafter; 10 retromarginal denticles; rastellum with 45 short, thick conical setae on promargin. Leg, palpal measurements in Table 4; chaetotaxy in Table 5. Tarsus I-IV scopula entire, metatarsus I-II entire, III–IV absent. Anterior tibiae without scopula. STC with numerous teeth in two lateral rows. ITC I-IV absent. Claw tufts absent. Palpal claw with 4 teeth in prolateral median line. Two spermathecal receptacles, single sinuous neck; reniform fundus (Fig. 3E). Four spinnerets, PMS short monoarticulated, PLS triarticulated apical article short, domed. Spigots without pumpkin-like socket. Coloration as in male.

Table 2. Length of legs palpal segments of the holotype male of Chaco castanea.
Fe Pa Ti Mt Ta Total
Palp 2 0.83 1.71 0.83 5.37
I 3.4 2 2.53 2.67 2.07 12.67
II 3.27 1.67 0.87 2.67 2.2 10.68
III 3 1.45 2.1 3.17 2.43 12.15
IV 3.93 1.6 3.73 4.33 2.93 16.52
Table 3. Spination of legs and palps of holotype male Chaco castanea.
Fe Pa Ti Mt Ta
Palp 2-1-1-0 0 0-3-1-0 0
I 4-1-1-0 0 0-2-0-6 0-1-1-3 0
II 5-2-3-0 0-1-0-0 0-2-0-3 0-1-1-3 0
III 0-0-0-6 0-3-1-0 6-2-2-6 3-4-4-6 0
IV 6-6-3-0 0-1-1-0 3-2-3-6 3-3-2-6 0
Table 4. Length of legs and palpal segments of the paratype female of Chaco castanea.
Fe Pa Ti Mt Ta Total
Palp 3.6 2.1 2.2 2.2 10.1
I 4.7 2.8 3.1 2.8 2.0 15.4
II 4.2 2.7 3.0 2.8 1.9 14.6
III 3.6 2.4 2.3 3.5 2.4 14.2
IV 5.0 3.2 4.2 5.1 2.9 20.4
Table 5. Spination of legs and palps of paratype female Chaco castanea.
Fe Pa Ti Mt Ta
Palp 0-1-0-0 0-1-0-0 0-4-1-6 0
I 0-1-0-0 0-0-0-0 0-0-0-1 0-0-0-3 0
II 0 0-2-0-0 0-2-0-2 0-1-0-2 0
III 0-1-0-0 0-3-1-0 1-2-2-2 2-2-3-6 0
IV 1-0-1-0 0-0-0-0 0-2-3-6 0-2-3-8 0

Distribution

Uruguay, Rocha, Perla de Rocha and Cabo Polonio.

Original Description

  • Oca, L; Pérez-Miles, F; 2013: Two new species of Chaco Tullgren from the Atlantic coast of Uruguay (Araneae, Mygalomorphae, Nemesiidae) ZooKeys, 337: 73-87. doi

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