Anillinus Casey, 1918

Harden, Curt W. & Caterino, Michael S., 2024, Systematics and biogeography of Appalachian Anillini, and a taxonomic review of the species of South Carolina (Coleoptera, Carabidae, Trechinae, Anillini), ZooKeys 1209, pp. 69-197 : 69-197

Genus Anillinus Casey, 1918

Anillinus Casey 1918: 167 . Type species: Anillus (Anillinus) carolinae Casey, 1918 , by original designation.

Micranillodes Jeannel 1963 a: 57. Synonymy established by Bousquet (2012: 699). Type species: Micranillodes depressus Jeannel, 1963 a, by original designation.

Troglanillus Jeannel 1963 b: 147. Synonymy established by Barr (1995: 240). Type species: Troglanillus valentinei Jeannel, 1963 b, by original designation.

Adult diagnosis.

From Serranillus , members of Anillinus can be recognized by the position of the medial setae of the mentum not on the tooth (Fig. 11 B ), the last abdominal ventrite of males without dentate projections or lateral internal extensions, left mandible without a retinacular tooth (Fig. 11 D ), and right paramere well developed and bearing at least four setae. Most Anillinus also have shorter background pubescence on the elytral disc and a less robust habitus than Serranillus .

Larval diagnosis.

The single late-instar larval specimen of Anillinus that is known (Fig. 13 A ) differs from that of S. dunavani in possessing a serrate terebra (Fig. 14 A ) and stipes with gMX setae arranged in an even row (Fig. 14 C ). Early instar Anillinus do not seem to differ from early instar Serranillus .

Diversity.

The eight species described below bring the total number of described species of Anillinus to 78, making it the most speciose genus of Anillini . Including undescribed species that we have studied (Suppl. material 3), the total known diversity of Anillinus is at least 149 species.

Distribution.

West of the Mississippi, Anillinus are known from the Ozark Plateau in southern Missouri and Northern Arkansas, the Ouachita Mountains in Oklahoma and Arkansas, and the Balcones Escarpment in central Texas. In the east, Anillinus are known from Washington, D. C., Pendleton Co., WV, Cincinnati, OH ( Dury 1902) and Lawrence Co., IN south to northern Florida, southern Alabama, and southeastern Louisiana.

‘ dentatus group’

Figures

Figure 11. SEM micrographs of mouthparts of Appalachian Anillini genera A mentum of Serranillus dunavani (Jeannel) B mentum of Anillinus choestoea C mandibles of S. dunavani, dorsal aspect D mandibles of A. choestoea, dorsal aspect. Scale bars: 0.1 mm.

Figure 13. Dorsal habitus of late-instar larvae A Serranillus dunavani (Jeannel) B Anillinus jancae. Scale bars: 1 mm.

Figure 14. Details of late-instar larvae of Appalachian Anillini A head of Anillinus jancae sp. nov., dorsal aspect, left antenna and right mandible omitted B left mandible of Serranillus dunavani (Jeannel), dorsal aspect C right maxilla of A. jancae, dorsal aspect D right maxilla of S. dunavani, dorsal aspect E urogomphi of A. jancae, dorsal aspect. Scale bar: 0.1 mm.