Xenolycus, Ferreira & Silveira, 2020

Ferreira, Vinicius S. & Silveira, Luiz Felipe Lima, 2020, A new suspected paedomorphic genus of net-winged beetles from the Atlantic Rainforest (Coleoptera, Elateroidea, Lycidae), Papéis Avulsos de Zoologia (Pap. Avulsos Zool., S. Paulo) 60 (35), pp. 1-6 : 2-3

Genus Xenolycus gen. nov.

( Figs. 1‑2 )

Type species: Xenolycus costae sp. nov.

Differential diagnosis: Xenolycus gen.nov. can be distinguished from all other known Calopterini as defined in Bocakova (2003, 2005) and other Neotropical Lycidae , by the combination of pronotum with a wide, deep and strongly visible longitudinal cell in the disc area ( Fig. 1 ), (vs. variable in other Calopterini genera, ranging from an absent cell in Calopteron Laporte and Mesopteron Bourgeois , or ranging from a slim and barely visible cell in Metapteron Bourgeois and Falsocaenia Pic , to a lenticular cell in Haplobothris Bourgeois , the latter nev- er as wide or deep as in Xenolycus , absence of a cell in this conformation in all other Neotropical Lycidae ), the filiform antennae, densely setose ( Fig. 1 ) (vs. serrate or subserrate in the majority of other Neotropical Lycidae and Calopterini , Calopteron , Mesopteron , Metapteron , Falsocaenia and Haplobothris or flabellate in Acroleptus Bourgeois , Aporrhipis Pascoe , but filiform, shared with Neolyrium Kazantsev , and Tishechkinia Kazantsev and Electropteron Kazantsev , the last two currently in the Leptolycini ), elytra dehiscent (vs. elytra shape variable across the Neotropical Lycidae genera, usually dehis- cent in groups known or suspected to be neotenous such as Ceratopriomorphus Pic ), smooth, with reticulation strongly reduced ( Fig. 1 ) (vs. strongly reticulate elytra in most Calopterini genera), with only two weakly developed and indistinct elytral costae ( Fig. 2A ) (vs. elytral costae usually strongly visible and easily identifiable in most Neotropical Lycidae , ranging from two to four costae, with the exception of Platerodini , which are usually absent), mouthparts partially reduced, labial palps two-segmented (vs. mostly three-segmented), with rudimentary, barely visible mandibles, seemingly absent ( Fig. 2A ) (vs. mandible developed in most genera, exceptions to some of the West Indies Leptolycini , such as Leptolycus Leng and Mutchler , also with seemingly absent mandibles), and by the maxillary palpomere II much longer (4×) than the precedent ( Fig. 2A ).

Description: General coloration and pubescence dark brown ( Fig. 1A ). Body setose, dorsal pubescence short and erect on elytra, remainder of body with fine pubescence throughout ( Fig. 1A ).

Figures

Figure 1. Xenolycus costae gen.nov.et sp.nov., male.(A) Dorsal habitus.

Figure 2. Xenolycuscostae gen.nov.etsp.nov.,male.(A)Headandmouthpartsdetail;(B)Ventralviewof thorax;(C)Membranouswing;(D)Male genitalia,dorsalview.