Rhinodontodes Voss, 1967

Ren, Li, Borovec, Roman & Zhang, Runzhi, 2020, On Chinese Trachyphloeini with description of four new species (Coleoptera, Curculionidae, Entiminae), ZooKeys 974, pp. 93-119: 93

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Rhinodontodes Voss, 1967


Rhinodontodes Voss, 1967  

Rhinodontodes   Voss, 1967: 276 (original description); Alonso-Zarazaga and Lyal 1999: 183 (catalogue); Borovec 2003: 31 (note); Borovec 2009: 76 (redescription of the genus); Alonso-Zarazaga et al. 2017: 403 (catalogue).


The genus was described by Voss (1967) for a single species, Rhinodontodes subsignatus   Voss, 1967, based on a single specimen from Mongolia. The holotype was later examined by Borovec (2003) and until recently was the only specimen of the genus known. We now have access to 21 more specimens of this genus, mainly from the collections of IZCAS and ZIN, and we are able to discuss characters used for the definition of Rhinodontodes   . Voss described the genus as similar to Rhinodontus   in its elongated epistome, but distinguishable by tarsomere 3 being wider than tarsomere 2, claws parallel in basal half, apical part of protibiae not distinctly enlarged laterally, rounded, without spines and narrower pronotum, 1.34-1.42 × as wide as long, with anterior margin not distinctly narrower than posterior one. Borovec (2009) in his phylogenetic analysis of the tribe Trachyphloeini   confirmed Rhinodontodes   as related to Rhinodontus   and Pseudocneorhinus   , sharing the character states of epistome projected anteriorly and ocular lobes with short setae with Rhinodontus   , and having as an autapomorphy, rostrum continuous with head, not separated by any furrow. Some of the characters previously used to distinguish Rhinodontodes   are not unique, in comparison with newly known Pseudocneorhinus   described in Ren et al. (2019). Males of P. bifasciatus   Roelofs, 1880 also have the epistome projected anteriorly ( Borovec 2009: figs 55, 61), creating a striking tooth, and P. glaber   Ren, Borovec, Zhang, 2019 also have weak ocular lobes with very short setae and, especially, have a long rostrum and epifrons constricted in the middle. These two species thus show characters very similar to the shape of the rostrum of Rhinodontodes   . Thus, Rhinodontodes   seems to be more closely related to Pseudocneorhinus   than was previously assumed. Study of further material of both genera will confirm whether the two genera are separate or should be placed in synonymy. Presently, Rhinodontodes   can be distinguished from Pseudocneorhinus   mainly by the rostrum and head being on the same level and the protibiae being laterally weakly enlarged ( Borovec 2009: fig. 58).












Rhinodontodes Voss, 1967

Ren, Li, Borovec, Roman & Zhang, Runzhi 2020


Voss 1967