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Life beneath the surface of the central Texan Balcones Escarpment: genus Anillinus Casey, 1918 (Coleoptera, Carabidae, Bembidiini): new species, a key to the Texas species, and notes about their way of life and evolution.

Sokolov IM, Reddell JR, Kavanaugh DH - Zookeys (2014)

Bottom Line: There the cavernous Edwards-Trinity aquifer system provided an excellent refugium as the regional climate in the late Tertiary and early Quaternary became increasingly drier, rendering life at the surface nearly impossible for small, litter-inhabiting arthropods.Isolated within the Edwards-Trinity aquifer system, these anilline lineages subsequently differentiated, accounting for the currently known diversity.The paucity of specimens and difficulty in collecting them suggest that additional undiscovered species remain to be found in the region.

View Article: PubMed Central - HTML - PubMed

Affiliation: Department of Entomology, California Academy of Sciences, 55 Music Concourse Drive, Golden Gate Park, San Francisco, CA 94118, U.S.A.

ABSTRACT
The Texas fauna of the genus Anillinus Casey, 1918 includes three previously described species (A. affabilis (Brues), 1902, A. depressus (Jeannel), 1963 and A. sinuatus (Jeannel), 1963) and four new species here described: A. acutipennis Sokolov & Reddell, sp. n. (type locality: Fort Hood area, Bell County, Texas); A. comalensis Sokolov & Kavanaugh, sp. n. (type locality: 7 miles W of New Braunfels, Comal County, Texas); A. forthoodensis Sokolov & Reddell, sp. n. (type locality: Fort Hood area, Bell County, Texas); A. wisemanensis Sokolov & Kavanaugh, sp. n. (type locality: Wiseman Sink, Hays County, Texas). A key for identification of adults of these species is provided. The fauna includes both soil- and cave-inhabiting species restricted to the Balcones Fault Zone and Lampasas Cut Plain and adjacent areas underlain by the Edwards-Trinity Aquifer. Based on morphological and distributional data, we hypothesize that four lineages of endogean Anillinus species extended their geographical ranges from a source area in the Ouachita-Ozark Mountains to the Balconian region in central Texas. There the cavernous Edwards-Trinity aquifer system provided an excellent refugium as the regional climate in the late Tertiary and early Quaternary became increasingly drier, rendering life at the surface nearly impossible for small, litter-inhabiting arthropods. Isolated within the Edwards-Trinity aquifer system, these anilline lineages subsequently differentiated, accounting for the currently known diversity. The paucity of specimens and difficulty in collecting them suggest that additional undiscovered species remain to be found in the region.

No MeSH data available.


Related in: MedlinePlus

Locality records for Anillinus species: Anillinus acutipennis – white stars; Anillinus affabilis – black triangle; Anillinus comalensis – white diamond; Anillinus depressus – black diamond; Anillinus forthoodensis – white quadrangle; Anillinus lescheni – black circle Anillinus sinuatus– black quadrangle; Anillinus wisemanensis– white triangles; Anillinus spp. – white circles (1 – Bell and Coryell Counties; 2 – Williamson County; 3 – Bexar County). Violet color – range of the western Anillinus species in Arkansas and Oklahoma (Sokolov et al. 2004). Light blue color – recharge zone of the Edwards Aquifer, dark blue color – the Balcones Escarpment, topographic expression of the Balcones Fault Zone (Woodruff and Abbot 1986). Contour of the Cross Timbers ecological region (highlighted) were taken from Wikipedia: http://en.wikipedia.org/wiki/Cross_Timbers. Elevation scale bar is given in meters.
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Figure 8: Locality records for Anillinus species: Anillinus acutipennis – white stars; Anillinus affabilis – black triangle; Anillinus comalensis – white diamond; Anillinus depressus – black diamond; Anillinus forthoodensis – white quadrangle; Anillinus lescheni – black circle Anillinus sinuatus– black quadrangle; Anillinus wisemanensis– white triangles; Anillinus spp. – white circles (1 – Bell and Coryell Counties; 2 – Williamson County; 3 – Bexar County). Violet color – range of the western Anillinus species in Arkansas and Oklahoma (Sokolov et al. 2004). Light blue color – recharge zone of the Edwards Aquifer, dark blue color – the Balcones Escarpment, topographic expression of the Balcones Fault Zone (Woodruff and Abbot 1986). Contour of the Cross Timbers ecological region (highlighted) were taken from Wikipedia: http://en.wikipedia.org/wiki/Cross_Timbers. Elevation scale bar is given in meters.

Mentions: Figs 2C, F, J, 3B, 5E, 7G, 8


Life beneath the surface of the central Texan Balcones Escarpment: genus Anillinus Casey, 1918 (Coleoptera, Carabidae, Bembidiini): new species, a key to the Texas species, and notes about their way of life and evolution.

Sokolov IM, Reddell JR, Kavanaugh DH - Zookeys (2014)

Locality records for Anillinus species: Anillinus acutipennis – white stars; Anillinus affabilis – black triangle; Anillinus comalensis – white diamond; Anillinus depressus – black diamond; Anillinus forthoodensis – white quadrangle; Anillinus lescheni – black circle Anillinus sinuatus– black quadrangle; Anillinus wisemanensis– white triangles; Anillinus spp. – white circles (1 – Bell and Coryell Counties; 2 – Williamson County; 3 – Bexar County). Violet color – range of the western Anillinus species in Arkansas and Oklahoma (Sokolov et al. 2004). Light blue color – recharge zone of the Edwards Aquifer, dark blue color – the Balcones Escarpment, topographic expression of the Balcones Fault Zone (Woodruff and Abbot 1986). Contour of the Cross Timbers ecological region (highlighted) were taken from Wikipedia: http://en.wikipedia.org/wiki/Cross_Timbers. Elevation scale bar is given in meters.
© Copyright Policy - creative-commons-attribution
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4109464&req=5

Figure 8: Locality records for Anillinus species: Anillinus acutipennis – white stars; Anillinus affabilis – black triangle; Anillinus comalensis – white diamond; Anillinus depressus – black diamond; Anillinus forthoodensis – white quadrangle; Anillinus lescheni – black circle Anillinus sinuatus– black quadrangle; Anillinus wisemanensis– white triangles; Anillinus spp. – white circles (1 – Bell and Coryell Counties; 2 – Williamson County; 3 – Bexar County). Violet color – range of the western Anillinus species in Arkansas and Oklahoma (Sokolov et al. 2004). Light blue color – recharge zone of the Edwards Aquifer, dark blue color – the Balcones Escarpment, topographic expression of the Balcones Fault Zone (Woodruff and Abbot 1986). Contour of the Cross Timbers ecological region (highlighted) were taken from Wikipedia: http://en.wikipedia.org/wiki/Cross_Timbers. Elevation scale bar is given in meters.
Mentions: Figs 2C, F, J, 3B, 5E, 7G, 8

Bottom Line: There the cavernous Edwards-Trinity aquifer system provided an excellent refugium as the regional climate in the late Tertiary and early Quaternary became increasingly drier, rendering life at the surface nearly impossible for small, litter-inhabiting arthropods.Isolated within the Edwards-Trinity aquifer system, these anilline lineages subsequently differentiated, accounting for the currently known diversity.The paucity of specimens and difficulty in collecting them suggest that additional undiscovered species remain to be found in the region.

View Article: PubMed Central - HTML - PubMed

Affiliation: Department of Entomology, California Academy of Sciences, 55 Music Concourse Drive, Golden Gate Park, San Francisco, CA 94118, U.S.A.

ABSTRACT
The Texas fauna of the genus Anillinus Casey, 1918 includes three previously described species (A. affabilis (Brues), 1902, A. depressus (Jeannel), 1963 and A. sinuatus (Jeannel), 1963) and four new species here described: A. acutipennis Sokolov & Reddell, sp. n. (type locality: Fort Hood area, Bell County, Texas); A. comalensis Sokolov & Kavanaugh, sp. n. (type locality: 7 miles W of New Braunfels, Comal County, Texas); A. forthoodensis Sokolov & Reddell, sp. n. (type locality: Fort Hood area, Bell County, Texas); A. wisemanensis Sokolov & Kavanaugh, sp. n. (type locality: Wiseman Sink, Hays County, Texas). A key for identification of adults of these species is provided. The fauna includes both soil- and cave-inhabiting species restricted to the Balcones Fault Zone and Lampasas Cut Plain and adjacent areas underlain by the Edwards-Trinity Aquifer. Based on morphological and distributional data, we hypothesize that four lineages of endogean Anillinus species extended their geographical ranges from a source area in the Ouachita-Ozark Mountains to the Balconian region in central Texas. There the cavernous Edwards-Trinity aquifer system provided an excellent refugium as the regional climate in the late Tertiary and early Quaternary became increasingly drier, rendering life at the surface nearly impossible for small, litter-inhabiting arthropods. Isolated within the Edwards-Trinity aquifer system, these anilline lineages subsequently differentiated, accounting for the currently known diversity. The paucity of specimens and difficulty in collecting them suggest that additional undiscovered species remain to be found in the region.

No MeSH data available.


Related in: MedlinePlus