Horologion, a New Genus of Cave Beetles

Valentine, J. Manson

doi:10.1093/aesa/25.1.1

Cited by 9 publications

(5 citation statements)

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“…There are many examples of even the extreme of single‐cave endemics. Horologion speokoites Valentine is in a unique genus of trechine (carabid) beetles and is known from a single cave in Greenbrier County, West Virginia (Valentine, 1932). The amphipod Niphargobates orophobata Sket is known from a single ceiling drip in the Postojna‐Planina Cave system of Slovenia (Sket, 1981) and is one of only two species in the genus.…”

Section: Introductionmentioning

confidence: 99%

Patterns of endemism of the eastern North American cave fauna

Christman

Culver

Madden

et al. 2005

Journal of Biogeography

101

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Aim Over 250 species of obligate terrestrial cave‐dwelling animals (troglobionts) are known from single caves in the eastern United States. We investigate their geographical distribution, especially in relation to other troglobionts. We relate these patterns to taxonomic group, opportunities for dispersal and geographical location. Location Caves of the United States east of the Mississippi River. Methods We associated over 3000 records of more than 450 troglobiotic species and subspecies with hexagons of 1000, 5000 and 10,000 km2 in size. We calculated Moran's I, black–white joins and cubic regression of endemics on non‐endemics at all three spatial scales. For 5000 km2 hexagons, we modelled the spatial autocorrelation of the residuals of the cubic regression of endemics on non‐endemics. Results Differences among orders in percentage single‐cave endemism were not significant, except for Pseudoscorpionida, which was higher (69%) than any other order. At all three scales, Moran's I and black–white joins were significant, indicating a clumped distribution of both single‐cave endemics and other troglobionts. Spatial patterns were similar at all three scales and Moran's I was highest at 5000 km2. The cubic fit of endemics to non‐endemics was consistently better, with less systematic error or residuals, than were linear or quadratic models. Residuals showed a significant geographical pattern with excess endemics in more southerly locations. Main conclusions There was both a non‐spatial and spatial component to the pattern of single‐cave endemism. The non‐spatial component was the association of high levels of single‐cave endemism with areas of high diversity of non‐endemics. It may be that both are high because of high secondary productivity. Spatially, single‐cave endemism is high in central rather than peripheral areas and in the southern part of the range. It is not higher in areas of more dissected limestone, which would reduce migration rates; if anything endemism is lower. Regional spatial effects are important, indicating that cave communities cannot be understood (or protected) in isolation.

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Section: Introductionmentioning

confidence: 99%

Patterns of endemism of the eastern North American cave fauna

Christman

Culver

Madden

et al. 2005

Journal of Biogeography

101

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“…In the United States, anillines are represented by the following six genera: Micranillodes Jeannel (1963a), based on a single female specimen of M. depressus Jeannel from Travis County, Texas; Anillodes Jeannel (1963a), known from five species in California and Texas; Anillaspis Casey (1918), known from two California species, each based on a single female specimen; Horologion Valentine (1932), based on a single specimen of H. speokoites Valentine from a cave in West Virginia; Serranillus Barr (1995), a southern Appalachian genus previously containing only S. jeanneli Barr, but now including a second species transferred from Anillinus Casey (1918) in this paper; and Anillinus, the main focus of this paper, a southeastern U.S. genus containing 11 previously described species (Ball and Bousquet 2001, key to genera) and 17 described herein.…”

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Review of Anillinus, with Descriptions of 17 New Species and a Key to Soil and Litter Species (Coleoptera: Carabidae: Trechinae: Bembidiini)

Sokolov

Carlton

Cornell

2004

The Coleopterists Bulletin

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“…lat.) close to and perhaps hierarchically coequal with the Anillini, rather than be relegated to the Psydrini, as was suggested by Valentine (1932) and actually done by Ball (i960). Casey, 1914, The beetles are very active and crawl rapidly away when disturbed, but do not attempt flight.…”

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confidence: 80%

“…Parenthetically it should be noted that Horologion speokoites Valentine (1932), an eyeless carabid known only from the unique holotype male taken in a West Virginia cave, has many features in common with the more primitive bembidiines (cf. Barr, 1969, p. 87).…”

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Micratopus Casey in the United States (Coleoptera: Carabidae: Bembidiinae)

Burr

1971

Psyche: A Journal of Entomology

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The late Rene Jeannel (e.g., 1946, p. 331) divided the bembidiine carabids, which he regarded as a subfamily Bembidiitae, into four tribes: Anillini, Limnastini, Tachyini, and Bembidiini. He included Micratopus Casey (1914, p. 42) and Limnastis Motschulsky in the Limnastini, although the former genus had previously formed the type of Casey's tribe Micratopini. Ball (i960) retained Micratopini as a tribe of the Carabidae, but his "Bembidiini" is equivalent to the "Anillini", "Tachyini", and "Bembidiini" of Jeannel. Ball's classificatory scheme thus implies that Limnastis and Micratopus are phylogenetically so remote that they merit a hierarchical status equivalent to that of all other bembidiines.

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Horologion, a New Genus of Cave Beetles

Cited by 9 publications

References 0 publications

Patterns of endemism of the eastern North American cave fauna

Patterns of endemism of the eastern North American cave fauna

Review of Anillinus, with Descriptions of 17 New Species and a Key to Soil and Litter Species (Coleoptera: Carabidae: Trechinae: Bembidiini)

Micratopus Casey in the United States (Coleoptera: Carabidae: Bembidiinae)

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