Corythalia insularis Ruiz, Brescovit & Freitas, 2007

Bayer, Steffen, Höfer, Hubert & Metzner, Heiko, 2020, Revision of the genus Corythalia C. L. Koch, 1850, part 1: Diagnosis and new species from South America (Araneae: Salticidae: Salticinae: Euophryini), Zootaxa 4806 (1), pp. 1-144 : 22-23

Corythalia insularis Ruiz, Brescovit & Freitas, 2007

Figs 10 A–B

Corythalia insularis Ruiz, Brescovit & Freitas 2007: 772 , figs 10–11 (description & illustration of ♂). Holotype ♂ from BRA- ZIL: Pernambuco: Fernando de Noronha Archipelago: Fernando de Noronha Island , 03°50’S, 32°25’W; G.C.C. Freitas leg. 07–19 Apr. 2006, IBSP 70339 , destroyed during the fire in IBSP 2010 , thus not examined.

Diagnosis. Males distinguished from those of all other Corythalia species by the following characters in combination: embolus (E) (actual tubular section) quite short [length at most 2/3 the width of tegulum (T), Fig. 10A ], without any apophyses and directed +/- distally (tip at most minimally bent prolatero-distally); width of embolus base-circle (about 1/2 the width of tegulum (at most slightly more) ( Fig. 10A ). RTA quite narrow (in ventral view at central section hardly broader than E at central section) and longer than E ( Fig. 10A ). Proximal tegulum lobe (PTL) not distinctly separated/distinguished but T rather retrolatero-proximally conically converging with blunt-rounded ending and proximal section of T definitely without prolateral lobe ( Fig. 10A ).

Description. Male [all aspects reproduced from Ruiz et al. (2007)]: total length 3.45, carapace length 1.8, maximal carapace width 1.25, width of eye rectangle 1.15. Cheliceral furrow with 1 retromarginal teeth. Measurements of legs: femur I 0.95, II 0.95, III 1.10, IV 1.05; patella + tibia I 0.95, II 0.95, III 1.05, IV 1.05; metatarsus + tarsus I 0.75, II 0.80, III 1.05, IV 1.10. LEG FORMULA: 4&321 (legs III & IV with exactly the same length). Long fringe hairs on tibia III present. COPULATORY ORGAN: embolus quite short, hose-like and arising point at medio-proximal section of embolus base ( Fig. 10A ); embolus base circle about half as broad as tegulum or slightly broader ( Fig. 10A ). Tegulum narrower than cymbium, sperm duct double-stacked S-shaped, occupying slightly more than retrolateral 1/2 of tegulum ( Fig. 10A ), retrolatero-proximal tegulum lobe (PTL) hardly distinguished from residual tegulum, but T almost only blunt-rounded conically converging retrolatero-proximally ( Fig. 10A ). Cymbium in ventral view ( Fig. 10A ) distally conically converging, most likely with scopula at distal section even though not recognisable in any of the illustrations ( Figs 10 A–B). Palpal tibia short, broader than long ( Figs 10 A–B), ventral tibial bump not recognisable (not illustrated as being flat and inconspicuous?). RTA dorsally with distinct serration ( Fig. 10B ) reaching far proximally.

Remarks. as this species exhibits a similar male copulatory organ as C. latipes , C. conferta sp. nov. and C. drepane sp. nov. it is likely that it is closely related to these species. Consequently it is likely that its colouration is very similar to these species. The conservative aspects (see genus description) are certainly given in this species. The following aspects can be recognised in the similar species mentioned above: carapace dark red-brown. Legs dark brown to red-brown, except for some articles being lighter (see genus description). Opisthosoma like noted in genus description under general dorsal colouration, except for chevron-like patch in central band missing.

Female: unknown.

Remarks. The male holotype was destroyed during the fire disaster at the Instituto Butantan, São Paulo. Hence, it could not be re-examined for the present study. Other material of this species does not exist at the collections of the IBSP (A.D. Brescovit, pers. comm.). We therefor based our species description, revised diagnosis, etc. on the illustrations and descriptions in Ruiz et al. (2007).

Based on the male copulatory organs, C. insularis is similar to C. latipes , C. conferta sp. nov. and C. drepane sp. nov. These species thus might be close relatives to the present species.

Distribution. Known only from the type locality Fernando de Noronha Island, Brazil).

Figures

FIGURE 10. Corythalia insularis, male holotype from Fernando de Noronha island, Pernambuco, Brazil. A–B left palp (A ventral view; B retrolateral view). Reproduced from Ruiz, Brescovit & Freitas (2007, figs 10–11).