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