Cyllodini, Everts, 1898

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 : 305

Key to genera of Cyllodini occurring in Australia

1. Mesoventrite with anterior edge strongly oblique, almost vertical, so that most of its surface, including a median carina, is higher (in ventral view, projecting towards the observer) than mesocoxae or metaventrite; metanepisternum less than 3× as long as wide and more or less parallel-sided; mandibular apex unidentate and simple (without serrations or spines); pronotum at least slightly wider than combined elytra ( Figs 1, 3 ); elytra shorter than their combined widths; elytral punctures not forming distinct rows; length at least 4.5 mm; gonocoxites narrowly elongate, parallel-sided and subcontiguous, with distinct, elongate, parallel-sided, apical gonostyli ( Fig. 59 ); northern NSW & southern QLD; associated with Opuntia cacti..................................................................................................... Camptodes Erichson

- Mesoventrite with anterior edge flat or weakly carinate and any change in elevation occurring only at posterior end; metanepisternum more than 3.5× as long as wide and distinctly narrowed posteriorly ( Fig. 14 ); pronotum not wider than combined elytra ( Figs 2, 4 ); mandibular apex, IF unidentate, THEN armed with serrations or spines; IF length greater than 4 mm, elytra distinctly longer than wide; ovipositor never with elongate, parallel-sided, apical gonostyli; associated with various fungi..... 2

2 (1). Labrum wider than clypeus, consisting of a pair of diverging, rounded lobes flanking a deep notch widest at its opening, narrowing posteriorly and almost reaching the labral base; outer apical angle of protibia with distinct tooth; length always greater than 3.5 mm; associated with the fruiting bodies of Phallales ................................. Gymnocychramus Lea

- Labrum never as above, widest at base and not wider than clypeus, its apex usually with small median cleft with parallel sides; outer apical angle of protibia without distinct tooth; length never greater than 3.5 mm; associated with the non-woody fruiting bodies of Basidiomycetes (mushrooms).................................................................... 3

3 (2). Mesoventrite with anterior edge on a distinctly different plane than metaventrite, its posterior end more or less vertical and emarginate forming a pair of mesothoracic lobes flanking the truncate anterior edge of metaventrite and visible in ventral view ( Figs 50–51 ); posterior edges of mesocoxal cavities not joined by curved line extending across anterior process of metaventrite.................................................................................................... 4

- Mesoventrite with anterior edge on the same plane as or a slightly different plane than metaventrite, its posterior end emarginate but horizontal or only slightly oblique ( Figs 52–53 ); posterior edges of mesocoxal cavities joined by curved line extending across anterior process of metaventrite ( Figs. 52–53 ).......................................................... 5

4(3). Upper portion of body strongly convex ( Fig. 10 ); lateral margins of elytra not visible from above ( Fig. 2 ); frontoclypeal suture absent; vertexal line present at sides; mandible unidentate with dorsal and ventral serrations; all basal tarsomeres lobed; abdominal ventrite 1 without postcoxal lines.................................................. Cyllodes Erichson

- Upper portion of body only slightly convex ( Fig. 9 ); lateral margins of elytra visible for their entire lengths from above ( Fig. 5 ); frontoclypeal suture present (sometimes weakly indicated externally); vertexal line absent; mandible bidentate with dorsal lobe serrate; no basal tarsomeres lobed; abdominal ventrite 1 with postcoxal lines................ Cyllopallodes , gen. nov.

5(3). Prosternum in front of coxa very short, less than 0.3× as long as mid length of a coxal cavity; mesal portion of prosternum with median carina extending beyond middle of prosternal process; anterior portion of mesoventrite ( Fig. 52 ) with a pair of procoxal rests divided by a pair of posteriorly diverging carinae; metaventrite with short discrimen; axillary spaces absent; outer edge of mesotibia ( Fig. 56 ) evenly curved and usuallly widest just beyond middle; ovipositor ( Fig. 43 ) with broadly truncate apex.............................................................................. Coxollodes Kirejtshuk

- Prosternum about 0.5× as long as mid length of coxal cavity, without or with weak median carina and sometimes with acute anterior projection; anterior portion of mesoventrite ( Fig. 53 ) with short longitudinal carina and no procoxal rests; metaventrite without discrimen; axillary spaces ( Fig. 54 ) usually well developed; outer edge of mesotibia in Australian species ( Figs 57–58 ) subapically angulate; ovipositor with acute apex ( Figs 48–49 ).................................... Pallodes Erichson

Figures

FIGURES 1–11. Habitus: 1–6, dorsal: 1, Camptodes aff. humeralis (Brullé), bicoloured (5.0 mm); 2, Cyllodes ruficeps (Reitter) (3.1 mm); 3, Camptodes aff. humeralis (Brullé), unicoloured (5.2 mm); 4, Coxollodes loriai (Grouvelle) (1.9 mm); 5, Cyllopallodes limbatus (Reitter) (2.9 mm); 6, Gymnocychramus politus Lea (5.0 mm). 7–11, lateral: 7, Camptodes aff. humeralis (Brullé), bicoloured; 8, same, unicoloured; 9, Cyllopallodes limbatus (Reitter); 10, Cyllodes ruficeps (Reitter); 11, Coxollodes loriai (Grouvelle). Fig. 10 from Lawrence & Ślipiński (2013). All figures © CSIRO, Australia.

FIGURES 59–69. Genitalia: 59, Camptodes aff. humeralis (Brullé), apex of Ovipositor, ventral; 60–61, Gymnocychramus bicolor sp. nov., apex of penis: 60, dorsal (arrow pointing to apex of dorsal lobe); 61, same, lateral; 62–63, Gymnocychramus politus Lea, apex of penis: 62, dorsal; 63, lateral; 64–67, Macleayania vesca (Olliff): 64, apex of tegmen, dorsal; 65, base of tegmen, dorsal; 66, apex of penis; 67, apex of penile strut; 68–69, Macleayania amphotiformis (Reitter): 68, base of tegmen; 69, apex of penile strut. All figures © CSIRO, Australia.

FIGURES 12–23. Habitus: 12, Gymnocychramus bicolor sp. nov. (4.0 mm), dorsal; 13, Pallodes beccarii Grouvelle (3.0 mm), dorsal; 14, same, ventral; 15, Pallodes nigroapicalis sp. nov. (2.8 mm), dorsal; 16, same, lateral; 17, same, posterodorsal; P. beccarii, dorsal, teneral (2.5 mm); 19, P. beccarii, ventrolateral; 20, Macleayania vesca (Olliff) (3.3 mm), dorsal; 21, M. amphotiformis (Reitter) (4.2 mm), dorsal; 22, same, ventral; 23, G. bicolor, lateral. Fig. 20 from Lawrence & Ślipiński (2013). All figures © CSIRO, Australia.

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.

FIGURES 43–49. Ovipositors, ventral: 43, Coxollodes loriai (Grouvelle); 44, Cyllodes ruficeps (Reitter); 45, Cyllopallodes limbatus (Reitter); 46. Gymnocychramus bicolor sp. nov.; 47, Gymnocychramus politus Lea; 48, Pallodes beccarii Grouvelle; 49, Pallodes nigroapicalis sp. nov.