Anillinus steevesi Barr

Sokolov, Igor M. & Carlton, Christopher E., 2010, New species of Anillinus Casey (Carabidae: Trechinae: Bembidiini) from the Southern Appalachians and phylogeography of the A. loweae species group, Zootaxa 2502, pp. 1-23 : 13

publication ID	https://doi.org/ 10.5281/zenodo.195855
DOI	https://doi.org/10.5281/zenodo.5694153
persistent identifier	https://treatment.plazi.org/id/03E75129-5D54-FF5A-FF55-F94FFDAAFCD9
treatment provided by	Plazi
scientific name	Anillinus steevesi Barr
status

Treatment

Anillinus steevesi Barr View in CoL

( Figs. 4–5 View FIGURES 1 – 9 , 13–15 View FIGURES 10 – 13 View FIGURES 14 – 15 , 23 View FIGURES 20 – 27 , 31 View FIGURES 28 – 35 , 36 View FIGURE 36 , 37 View FIGURE 37 , 39 View FIGURE 39 , Table 1 View TABLE 1 )

Notes on distribution and variation. Until now the species ( Fig. 4–5 View FIGURES 1 – 9 ) was recorded only from GSMNP and Dade County, Georgia (type locality of the species, Barr 1995). Additional material greatly enlarges the known range of this species and the following records are new to the appropriate states and counties: ALABAMA: DeKalb Co., DeSoto State Park; Marion Co., 5mi SW Hackleburg; Morgan Co., Newsome Sinks; Lawrence Co., Bankhead NF; and MISSISSIPPI: Tishomingo Co., Natchez Trace Pkwy., several localities. Across the range an obvious tendency of microsculpture reduction is evident from east to west. The Smokies population of A. steevesi possesses well-developed microsculpture across the pronotum and head (except two paramedian patches characteristic for the group), thus presenting a typical appearance for loweae - group species. Specimens from the type locality are characterized by the reduction of microsculpture on the disc of the pronotum, but the head still bears distinct microsculpture. Among southwestern populations microsculpture is absent from the pronotum and mostly absent from the head; visible only along the frontal furrows and along the sides of the head. In addition, in this species the form of the apical part of the median lobe changes from east to west. Males from the type locality possess a rectangular enlargement of the median lobe wall on one side of the apical orifice, with a small tooth on the side extending towards the apex ( Fig. 13– 14 View FIGURES 10 – 13 View FIGURES 14 – 15 ). The same enlargement of the wall in specimens to the east of the type locality (from the Smokies) extends down the apex more gently and has no tooth along the margin ( Fig.15 View FIGURES 14 – 15 ). Populations of the species are consistent in the conformation of the median lobe across broad areas without intergrades insofar as currently known. The Smokies population is consistent in the conformation of the median lobe from the Oconaluftee Visitor Center (North Carolina) to the Chilhowee Mountains (North Carolina). The population from Georgia is consistent in morphological details at least to Lawrence County, Alabama. Males from there possess all the important characters of the median lobe of the specimens from the type locality, including the characteristic small denticle on the lateral wall extending towards the apex. Additional material is needed to clarify whether the Smokies and Georgia-Mississippi populations of A. steevesi represent isolated populations or the limits of a continuous patchwork of populations.