Chthonos kwati, Labarque & Piacentini & Pons & Hormiga & Arnedo & Ramírez, 2025
publication ID |
https://doi.org/10.5852/ejt.2025.1010.3021 |
publication LSID |
lsid:zoobank.org:pub:90524F49-7BA2-4B8A-9BE3-450CB77A31A0 |
DOI |
https://doi.org/10.5281/zenodo.17151277 |
persistent identifier |
https://treatment.plazi.org/id/03C987C4-B57A-8C7E-FD7A-FEDDFEC9F8C3 |
treatment provided by |
Plazi |
scientific name |
Chthonos kwati |
status |
sp. nov. |
Chthonos kwati sp. nov.
urn:lsid:zoobank.org:act:
Figs 1 View Fig , 12–13 View Fig View Fig
Diagnosis
Males and females of Chthonos kwati sp. nov. resemble the females of Chthonos tuberosa ( Keyserling, 1886) by the presence of five dorsal opisthosoamal tubercles, including two lateral pairs, each pair separated by their diameter, wider than long and relatively short, and one anterior central tubercle as wide as long ( Figs 12A–B View Fig , 13A–B View Fig ; Keyserling 1886: pl. XX figs 303, 303A), but C. kwati can be distinguished by the presence of a posterior central tubercle, longer than wide, extending posteriorly.
Etymology
The specific name is derived from ‘kwätí’ which means ‘six’ in the Ngäbere language, currently spoken by the Ngäbe native people of Panama, and refers to the six tubercles of the opisthosoma.
Type material
Holotype
PANAMA – Chiriquí Province • ♂; Reserva Forestal Fortuna , Quebrada Honda , one-hectare PANCODING inventory, 8.750083° N, 82.239083° W; 1135 m a.s.l.; 7–12 Jun. 2007; M. Arnedo, D. Dimitrov, G. Hormiga, F. Labarque and M. Ramírez leg.; voucher code SFD1NCR006; preparation codes FML-00706, FML-00707; DNA barcode SPIPA408-10 ; MIUP.
GoogleMapsParatype
PANAMA – Chiriquí Province • 1 ♀; same data as for holotype; voucher code SFU1NAD034; preparation code LNP-00279; DNA code chts2061; GenBank code PX096999 ; MACN-Ar 29067 . GoogleMaps
Description
Male ( holotype MIUP SFD1NCR006)
Total length 1.64. Prosoma: length 0.81, width 0.65, height 0.64. Sternum: length 0.40, width 0.49. Eye diameters and interdistances: AME 0.10, PME 0.09, AME–PME 0.10. Opisthosoma: length 1.4, width 1.14, height 1.06. Leg formula: 1243. Dorsal shield of prosoma reddish-brown ( Fig. 12A View Fig ). Sternum reddish-brown ( Fig. 12B–C View Fig ). Opisthosoma color overall yellowish-white with numerous setal sclerotized pits, and dorsal reddish-brown scutum with symmetric lighter pattern ( Fig. 12A–B View Fig ). Epiandrum, booklung cover, and tracheal spiracle reddish-brown ( Fig. 12B–C View Fig ). Spinneret field orange surrounded by reddish-brown sclerotized ring ( Fig. 12B–C View Fig ). Legs I–II darker than III–IV, femora and tibiae greenish-brown with lighter middle band, metatarsi greenish-brown but proximally lighter, patellae greenish-brown and tarsi orange ( Fig. 12A–C View Fig ). Palp: cymbium distally pointed, paracymbium proximally extended, median apophysis retrolateral side with blunt projection extending ventrally, conductor apophysis hooked, embolus entire and covered by conductor ( Fig. 12D–F View Fig ).
Female ( paratype MACN-Ar 29067)
Total length 1.98. Prosoma: length 0.89, width 0.69, height 0.71. Sternum: length 0.41, width 0.48. Eye diameters and interdistances: AME 0.10, PME 0.09, AME–PME 0.11. Opisthosoma: length 1.59, width 1.55, height 1.35. Leg formula: 1243. Coloration lighter than male ( Fig. 13A–C View Fig ). Opisthosoma scutum absent ( Fig. 13A–B View Fig ). Epigynal plate reddish-brown ( Fig. 13C View Fig ), with transverse ridges, transverse groove deep, central pit toothed ( Fig. 13D View Fig ). Vulva: copulatory ducts irregular and membranous, with patch of gland ducts dorsally, inserting ventrolaterally posteriorly into spermathecae, spermathecae round, sclerotized, and connate (i.e, fused along midline), fertilization ducts sclerotized, emerging laterally posteriorly from spermathecae, curving dorsally anteriorly to meet uterus externus ( Fig. 13D View Fig ).
Records and biology
Records are limited to collections made at 1135 m a.s.l. in premontane rainforest from Reserva Forestal Fortuna ( Fig. 1 View Fig ). The male and female have been collected at night by looking down and looking up, respectively.
Remarks
Males of C. kwati sp. nov. differ from those of other Panamanian species of Chthonos by having the conductor apophysis longer than wide, forming a straight angle hook ( Fig. 12E View Fig ), whereas C. dobo sp. nov. and C. kaibe sp. nov. have the apophysis wider than long ( Figs 8E View Fig , 10E View Fig ).
The type specimen of Chthonos tuberosa was examined. Tecmessa tuberosa Keyserling, 1886: 252 , pl. 20 fig. 303 [ ♀] [ type ♀ from Brazil, Santa Catarina, Blumenau (British Museum of Natural History), examined].
No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.
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