Cryptogonodesmus unciger, Golovatch, 2024

Golovatch, S. I., 2024, Five new species of the millipede family Trichopolydesmidae from Peru (Diplopoda: Polydesmida), Arthropoda Selecta 33 (1), pp. 1-13 : 7-8

publication ID	https://doi.org/10.15298/arthsel.33.1.01
DOI	https://doi.org/10.5281/zenodo.15547714
persistent identifier	https://treatment.plazi.org/id/03D98786-916F-FF90-C530-003DFEEDB17A
treatment provided by	Felipe
scientific name	Cryptogonodesmus unciger
status	sp. nov.

Treatment

Cryptogonodesmus unciger sp.n.

Figs 11–19 View Figs 11–13 View Figs 14–17 View Figs 18, 19 .

HOLOTYPE ♂ ( ZMUM), Peru, Junin Region, 16 km NW of Satipo, Rio Venado , 1120 m a.s.l., forest on slopes, 13–14.IX.2017, K.Yu. Eskov leg.

PARATYPES: 2 ♂♂, 1 ♀ ( ZMUM), same place, together with holotype .

NAME. To emphasize the hook-shaped solenomere.

DIAGNOSIS. Based on gonopodal conformation, as well as geographically, this new species seems to be especially similar to C. sacciformis sp.n., as the gonocoxite is likewise strongly reduced, rather washer-shaped and devoid of a gonocoel, whereas the telopodite is mostly unipartite, hypertrophied, well exposed and sac-shaped. However, C. unciger sp.n. differs in a non-hirsute gonotelopodite supplied with both a strong laterobasal apophysis (apo) and an unciform apical solenomere (sl) ( Figs 14–19 View Figs 14–17 View Figs 18, 19 ).

DESCRIPTION. Length ca 11.0–11.5 mm (♂, ♀), width of midbody pro- and metazonae 1.0 and 1.8 mm, respectively (♂, ♀). Colouration in alcohol rather uniformly red-brown, usually with lighter yellowish to yellow-brown head, telson, venter and legs ( Figs 11–13 View Figs 11–13 ). Body with 20 rings.

All other characters as in Moojenodesmus simplex sp.n., except as follows.

Antennae ( Figs 11–13 View Figs 11–13 ) longer and slightly more slender, in situ reaching past ring 3 dorsally. In width, collum <head <ring 2 <3 <4 <5=15, thereafter body gradually tapering towards telson ( Figs 11–13 View Figs 11–13 ). Paraterga very strongly developed, broad, set high (at about upper ¼ midbody height), starting with collum, dorsum very faintly convex; paraterga mostly weakly upturned above dorsum (♂) to subhorizontal (♀).

Gonopods ( Figs 14–19 View Figs 14–17 View Figs 18, 19 ) with relatively small coxites (cx), these being about as high as telopodites (te), each cx with a long, simple and unciform cannula (ca) as usual. Telopodite (te) massive, rounded and roughly sac-shaped, very strongly exposed due to a rudimentary gonocoel, with a conspicuous vermiform lateral apophysis (apo) at base and a short unciform solenomere (sl) apicolaterally; distal course of seminal groove (sg) ornamented with a number of setae.