Anillinus arenicollis Harden & Caterino, 2024

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

Anillinus arenicollis Harden & Caterino, 2024

Figs 21 M , 24 K , 34 B

Anillinus arenicollis Harden & Caterino, 2024: 18.

GenBank.

OR 853123, OR 839200, OR 838072, OR 839197, OR 839198, OR 853122, OR 839199, OR 839746, OR 837940, OR 838098, OR 838277.

Diagnosis.

Robust, dorsoventrally flattened, and parallel-sided (Fig. 34 B ). Dorsal surfaces of head and pronotum entirely covered in microsculpture. Males with both protarsomeres 1 and 2 expanded and dentate on inner margin with ventral adhesive setae. Male metafemora swollen with prominent tooth on posterior margin, median lobe of male aedeagus narrow and long with blocky apex that is deflexed ventrally. Female spermatheca (Fig. 21 M ) long, stem ribbed, not coiled proximally. Spermathecal duct long and coiled.

Distribution.

Known from a small area within the boundaries of the Carolina Sandhills National Wildlife Refuge in Chesterfield Co., SC.

Sympatry.

Members of this species have not been collected with other species of anillines.

Natural history.

The first specimen collected was in a sample of sifted litter collected in February. All other known specimens were collected in buried pipe traps set in sandy soil. Further litter sampling at the only known locality failed to produce further specimens, and members of this species are presumably endogean in habit.

Figures

Figure 21. Spermathecae of Anillini species A, B Anillinus chandleri C Anillinus castaneus D Anillinus murrayae E Anillinus simplex F Anillinus dentatus G Anillinus sp. “ South Carolina, Coon Branch ” H Anillinus micamicus I Anillinus mica J Anillinus choestoea K Anillinus seneca L Anillinus montrex M Anillinus arenicollis N Anillinus jancae O Anillinus cf. nantahala P Anillinus cherokee Q Anillinus loweae R Anillinus merritti S Serranillus dunavani T Serranillus jeanneli. Scale bar: 0.1 mm.

Figure 24. Male ring sclerite, ventral aspect. A Anillinus chandleri B Anillinus castaneus C Anillinus sp. “ South Carolina, Chestnut Ridge ” D Anillinus murrayae E Anillinus simplex F Anillinus dentatus G Anillinus mica H Anillinus micamicus I Anillinus choestoea J Anillinus seneca K Anillinus arenicollis L Anillinus montrex M Anillinus jancae N Anillinus loweae O Anillinus cherokee P Anillinus merritti. Scale bar: 0.5 mm.

Figure 34. Dorsal habitus of Anillinus species in the elongatus group and sinuaticollis group A Anillinus montrex B Anillinus arenicollis C Anillinus choestoea sp. nov. D Anillinus seneca sp. nov. E Anillinus mica sp. nov. F Anillinus micamicus sp. nov. Abdomens removed in B – F for DNA extraction. Scale bars: 1 mm.