Cybaeodamus malkini, Henrard & Jocqué & Carvalho, 2025
publication ID |
https://doi.org/10.5852/ejt.2025.1004.2965 |
publication LSID |
lsid:zoobank.org:pub:CBFB190D-EA5D-4AE9-9CEF-28ED59EF08E7 |
DOI |
https://doi.org/10.5281/zenodo.16615110 |
persistent identifier |
https://treatment.plazi.org/id/79487D14-FF82-FFDD-FDED-33CCFC6D29BE |
treatment provided by |
Plazi |
scientific name |
Cybaeodamus malkini |
status |
sp. nov. |
Cybaeodamus malkini sp. nov.
urn:lsid:zoobank.org:act:354DEC2C-0C56-420C-86FE-A4EC45163812
Figs 14–17 View Fig View Fig View Fig View Fig
Diagnosis
The male of this species resembles that of C. tocantins by sharing the group of strong macrosetae at the posterior tip of the sternum and the retromargin of the fourth coxae ( Fig. 14C, I View Fig vs Lise et al. 2009: fig. 61), and by the shape of the RTA ( Figs 16C, E View Fig , 17C View Fig vs Lise et al. 2009: fig. 65). These characteristics differentiate these species from all other congeners. However, C. malkini sp. nov. differs from C. tocantins by the shape of its tegular sclerites ( Figs 16B, D View Fig , 17A–B, D–E View Fig vs Lise et al. 2009: fig. 63), and by the absence of a ventral process on both the coxae and femur of leg III (see Lise et al. 2009: fig. 62).
Remark
In the diagnosis of C. tocantins by Lise et al. (2009), a ventral process on femur IV is mistakenly mentioned. However, the description and the fig. 62 refer to a ventral process on both the coxae and femur of leg III, which should align with the observed morphology.
Etymology
The specific name is a patronym in honour of Borys Malkin a dedicated naturalist and collector of the holotype.
Material examined
Holotype BRAZIL • ♂; Mato Grosso, Santa Terezinha, Barra do Tapirapé ; 10°28′14.9″ S, 50°30′22.7″ W; 11–30 Dec. 1960; B. Malkin leg.; AMNH. GoogleMaps
Description
Male holotype ( Figs 14–17 View Fig View Fig View Fig View Fig )
BODY MEASUREMENTS. Total length 4.83; carapace 2.65 long, 1.78 wide, narrowed to 1.15 in front, 0.92 high.
COLOUR IN ETHANOL ( Fig. 14A–B, D–E View Fig ). Carapace, cephalic area yellowish brown, cephalic groove dark brown, thoracic area medium brown with transverse pale stripes, half as long as carapace width, crossing middle of dark brown fovea; chelicerae, labium and endites medium brown, distally paler; sternum medium brown, paler towards centre; legs and palps pale yellow, with femora darker, medium brown; abdomen and spinnerets entirely pale cream.
CARAPACE ( Fig. 14A, D–E View Fig ). Oval, with marked constriction at palp trochanter level; profile slightly doomed, with slight depression at level of fovea, highest point posterior to fovea.
EYE ( Fig. 14F View Fig ). Sizes and interdistances: AME: 0.09; ALE: 0.11; PME: 0.10: PLE: 0.11; AME–AME: 0.03; AME–ALE: 0.04; AME–PME: 0.05; AME–PLE: 0.06; ALE–ALE: 0.16; ALE–PLE: 0.03; ALE– PME: 0.15; PME–PME: 0.04; PME–PLE: 0.08. MOQ: frontal width 0.21, posterior width 0.24, length 0.24.
CLYPEUS ( Fig. 14E–F View Fig ). 0.11 high, provided with few thick setae. Chilum not visible. Chelicerae ( Fig. 14G View Fig ) 0.76 long, densely covered with setae, promargin with two teeth, retromargin without.
STERNUM ( Fig. 14B–C, I View Fig ). Elongate oval, 1.28 long, 0.92 wide, lateral margins sinuous, cover of setae denser laterally, posteriorly with group of long, thick macrosetae.
LEGS ( Fig. 14A–E, I View Fig ). Femora ventrally with long bristles, denser on hind legs; coxae IV inflated basoretrolaterally, touching each other, with retrolateral longitudinal brush of long, thick macrosetae ( Fig. 14I View Fig ). Leg formula 4132 ( Table 4 View Table 4 ). Leg spination as in Fig. 15. View Fig
ABDOMEN ( Fig. 14A–C View Fig ). Ovoid, venter medially with dense, oval patch of small, thick, spine-shaped setae ( Fig. 14H View Fig ).
PALP ( Figs 16–17 View Fig View Fig ). Femur 1.10 long; tibia ventrally with group of long, curved setae; RTA provided with two prongs: superior one with prolateral side concave, with distal part slightly curved down, blunt tip, three times as long, inferior one (VP) with slightly sharper tip; cymbium ovoid, prolaterally with five strong spines and subapically with two ventral spines, with stout probasal flange (PCF) and slender retrolateral flange (RCF); tegulum complex with two narrow prongs pointing forward: one straight (TA), cylindrical with blunt tip, obliquely situated in the middle ( Fig. 16A View Fig ), other one (MA) retroanteriorly placed, slightly longer and sickle-shaped with sharp tip ( Fig. 16B View Fig ); subtegulum (St) emerging prolaterally as strongly sclerotized knob; conductor (C) large, folded; embolus (E) originating proanteriorly, above prolateral subtegular knob, simple, slender, emerging straight retrolaterad, then apically slightly curved, base with small boss prolaterally.
Female
Unknown.
Distribution
The species is known only from the type locality in Brazil ( Fig. 18 View Fig ).
AMNH |
American Museum of Natural History |
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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