Cyllopallodes Lawrence & Kirejtshuk, 2019

Lawrence, John F. & Kirejtshuk, Alexander G., 2019, Review of the Australian Cyllodini (Coleoptera: Nitidulidae: Nitidulinae), with descriptions of new taxa, and notes on the genus Macleayania (Nitidulini), Zootaxa 4544 (3), pp. 301-334 : 320

Cyllopallodes Lawrence & Kirejtshuk , gen. nov.

Type species: Pallodes limbicollis Reitter, 1880b .

Diagnosis. This new genus may be distinguished from all other cyllodine genera by a combination of the following features: 1) posterior portion of the mesoventrite sharply inclined, so that its apex is concealed in ventral view except for a pair of small lateral mesothoracic lobes lying on either side of truncate anterior process of metaventrite ( Fig. 51 ), 2) presence of a weakly impressed frontoclypeal suture (represented by a transverse shallow depression), 3) simple, non-lobed tarsi on all legs, 4) narrow lateral elytral margins which are visible for their entire lengths from above, 5) absence of a vertexal line; 6) bidentate mandibles with only the dorsal lobe serrate, 7) presence of very fine erect hairs on the dorsal surfaces (often abraded and difficult to see), and 8) the postcoxal lines on abdominal ventrite 1 extending well behind the posterior edges of the metacoxae, to about middle of the ventrite.

Etymology. From the generic names Cyllodes and Pallodes , referring to the presence of some features occurring in each genus.

Figures

FIGURES 50–58. Various structures: 50–51, junction of mesoventrite and metaventrite: 50, Cyllodes ruficeps (Reitter), showing large metathoracic lobes; 51, Cyllopallodes limbicollis (Reitter), showing small mesothoracic lobes (arrow); 52, Coxollodes loriai (Grouvelle), mesoventrite, showing large procoxal rests separated by pair of diverging carinae; 53, Pallodes nigroapicalis sp. nov., mesoventrite showing short median carina and lack of procoxal rests (arrow points to curved line connecting mesocoxal cavities); 54, P. nigroapicalis, anterolateral portion of metaventrite, showing postcoxal line and axillary space; 55, Cyllodes ruficeps (Reitter), base of tegmen, showing highly reduced, broadly rounded strut; 56–58, mesotibial apex: 56, Coxollodes loriai; 57, Pallodes nigroapicalis; 58, Pallodes beccarii (Grouvelle). Figs 43–49 © Zoological Institute, Russian Academy of Sciences, St. Petersburg. Figs 50–58 © CSIRO, Australia.