Cryphalomimus Eggers, 1927

Jordal, B. H., 2023, An illustrated key and new records of the Afrotropical bark beetle genus Cryphalomimus Eggers (Coleoptera, Curculionidae), Zootaxa 5353 (6), pp. 595-600 : 597

Cryphalomimus Eggers, 1927

Type species: Cryphalomimus striatus Eggers, 1927: 174

Diagnosis. Protibia on its anterior face with deep furrow for reception of tarsus; pronotum spherical with lateral carinae; eyes entire; antennal funiculus 7-segmented, club flat, slightly truncated anteriorly, with partial lateral grooves on its anterior face near the base of club, on posterior face corneous with a narrow partial septum; elytral interstriae carinated, interstriae 10 short, reaching only to level of metacoxae. Maxillae with coarse lacinial spines; labium with broad mentum which extends over most of the rhomboid shaped labial palp segment 1. Proventriculus with large anterior plate without median suture, weakly sclerotised, containing irregularly placed scale-like teeth. Male aedeagus with a simple curved spiculum gastrale without fork, tegmen open dorsally, ventrally with manubrium greatly enlarged and scoop-shaped; penis body as long as apodemes, apex distinctly narrowed.

Comments. The mouthparts ( Fig. 11 ), proventriculus ( Fig. 12 ) and male genitalia ( Fig. 13 ) are illustrated here for the first time. These structures reflect high similarity with Xyloctonus , Scolytomimus and Ctonoxylon Hagedorn , and differs strongly from Glostatus Schedl (see Jordal 2023). Even though the male aedeagus is missing the strongly sclerotized intromittent organ (basal sclerites) typical for these genera, the spicule, tegmen and general form and proportions of the aedeagus are the same as in Xyloctonus and Ctonoxylon . The anterior plate of the proventriculus is of the same principal type as in Xyloctonus , whereas the posterior plate is fully developed in Cryphalomimus , not reduced as in Xyloctonus . The mouthparts ( Fig. 11 ) are intermediate between Glostatus and the other xyloctonine genera and therefore less informative, although the mentum is characteristically broad as in related genera. Overall, the characteristic shape of the tibiae, pronotum, elytral interstriae, male aedeagus and in part, the proventriculus, clearly demonstrate a close relationship to Xyloctonus , Scolytomimus and Ctonoxylon , corresponding to molecular phylogenetic analyses ( Jordal 2023).

Figures

FIGURES 11–13. Digestive and reproductive organs of Cryphalomimus striatus. (11) Maxillae and labium (dorsal view); (12) proventriculus (inner view); (13) male aedeagus (dorsal view).