Difference between revisions of "Chaco castanea"
m (Imported from ZooKeys) |
m (1 revision) |
(No difference)
| |
Latest revision as of 11:47, 1 October 2013
| Notice: | This page is derived from the original publication listed below, whose author(s) should always be credited. Further contributors may edit and improve the content of this page and, consequently, need to be credited as well (see page history). Any assessment of factual correctness requires a careful review of the original article as well as of subsequent contributions.
If you are uncertain whether your planned contribution is correct or not, we suggest that you use the associated discussion page instead of editing the page directly. This page should be cited as follows (rationale):
Citation formats to copy and paste
BibTeX: @article{Oca2013ZooKeys337, RIS/ Endnote: TY - JOUR Wikipedia/ Citizendium: <ref name="Oca2013ZooKeys337">{{Citation See also the citation download page at the journal. |
Ordo: Araneae
Familia: Nemesiidae
Genus: Chaco
Name
Chaco castanea Oca & Pérez-Miles, 2013 sp. n. – Wikispecies link – ZooBank link – Pensoft 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.
| 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 |
| 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 |
| 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 |
| 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
Images
|
