Anillinus aleyae, Sokolov & Watrous, 2008

Sokolov, Igor M. & Watrous, Larry E., 2008, A New Species and the First Record of the GenusAnillinus (Carabidae: Trechinae: Bembidiini) from the Ozark Region, The Coleopterists Bulletin 62 (4), pp. 537-543 : 537-543

Key to species of Anillinus known to date from west of the Mississippi River

( Arkansas, Missouri, and Oklahoma).

1. Microsculpture indistinct or absent from pronotal disc. Median lobe with large axiniform apex. Beetles from Ouachita Mountains of Arkansas................................................... Anillinus robisoni Sokolov & Carlton

1 9. Pronotal disc with distinct microsculpture. Apex of medial lobe not forming any kind of protrusion. Beetles from Ouachita Mountains of Arkansas and other locations................................................................... 2

2. Elytra more oval (WE/ABL 0.35–0.39). Clypeus and head covered with distinct microsculpture. Median lobe with simple round apex. Armature of internal sac simple: dorsal sclerites in form of arcuate blade-like structures, ventral sclerites and spines absent. Beetles from Mt. Magazine, Arkansas........................................ Anillinus magazinensis Sokolov & Carlton

2 9. Elytra more parallel (WE/ABL 0.29–0.35). Clypeus partly smooth, head with indistinct microsculpture along the clypeal suture. Median lobe often with enlarged apex. Armature of internal sac more complex: dorsal sclerites often enlarged, with ventral sclerites or/and spines present......................... 3

542 3. Large species, body length. 2.1 mm. Beetles from Ouachita Mountains of Oklahoma................................ Anillinus lescheni Sokolov & Carlton

3 9. Small species, body length, 1.9 mm......................................... 4

4. Head narrower (WH/WPm 0.75–0.80). Pronotum wider across the base (WPa/WPp 1.03–1.07). Armature of internal sac with spines. Beetles from Ouachita Mountains of Arkansas... Anillinus tishechkini Sokolov & Carlton

4 9. Head broader (WH/WPm 0.80–0.86). Pronotum narrower across the base (WPa/WPp 1.06–1.20). Armature of internal sac lacking spines. Beetles from Oklahoma or Missouri.......................................................... 5

5. Median lobe with enlarged bill-shaped apex, its tip deflexed ventrally. Walls of median lobe bearing a row of long setae. Beetles from Ouachita Mountains of Oklahoma............................ Anillinus stephani Sokolov & Carlton

5 9. Median lobe with elongated, laterally curved apex, its tip reflexed dorsally. Walls of median lobe bearing poriferous canals without setae. Beetles from Missouri............................................ Anillinus aleyae new species