Some broad aspects of limestone solution in the Tennessee Valley

Moneymaker, Berlen C.

doi:10.1029/tr029i001p00093

Cited by 3 publications

(1 citation statement)

References 3 publications

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“…Moreover, dating based on biogeographic barrier formation is also problematic, as timing estimates of cave formation across the distribution of H. barri are highly variable. The formation of some caves in the eastern Appalachians and Cumberland Plateau have been estimated to occur in the late Pliocene to middle Pleistocene (Davies 1953, Anthony and Granger 2004, White 2009), while other caves along the Tennessee River Valley and the Highland Rim have been estimated to form in the late Mesozoic to the early Tertiary (Moneymaker 1948, Barr 1961. Therefore, assessing the timing of colonization is currently beyond the scope of this study.…”

Section: Genetic Diversity Of Helicodiscus Barrimentioning

confidence: 99%

Morphometrics and phylogeography of the cave-obligate land snail Helicodiscus barri (Gastropoda, Stylommatophora, Helicodiscidae)

Gladstone¹,

Niemiller²,

Pieper³

et al. 2019

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Molecular studies have recently led to the detection of many cryptic species complexes within morphologically ambiguous species formerly undescribed by the scientific community. Organisms such as land snails are at a particularly higher risk of species misidentification and misinterpretation, in that gastropod systematics are based almost entirely on external shell morphology. Subterranean ecosystems are associated with especially high degrees of cryptic speciation, largely owing to the abiotic similarities of these systems. In this study, we attempt to diagnose the potential cryptic diversity in the troglobitic land snail Helicodiscus barri. Land snails are generally associated with having low vagility, and as such this species' broad, mosaic distribution indicates the misdiagnosis of this organism as a single species. We analyze both mitochondrial (16S, CO1) and nuclear (28S, H3) genetic data for 23 populations. Phylogeny for H. barri was reconstructed using both maximum-likelihood and Bayesian approaches to assess relationships among populations, and two species delimitation methods (mPTP and ABGD) were used to detect the presence of unique molecular operational taxonomic units (MOTUs). Species delimitation results revealed seven and sixteen MOTUs respectively, suggesting the presence of several cryptic lineages within H. barri. To assess how external shell morphology corresponds with patterns of genetic and environmental variation, two morphometric approaches were used incorporating 115 shells from 31 populations. Both morphometric approaches reveal a significant environmental influence on shell morphology, and one approach showed the significance of MOTU groups. We discuss the delimitation and morphometric results and additionally provide discussion on the taxonomic and conservation implications of this study.A peer-reviewed open-access journal Nicholas S. Gladstone et al. / Subterranean Biology 30: 1-32 (2019) 2

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Section: Genetic Diversity Of Helicodiscus Barrimentioning

confidence: 99%

Morphometrics and phylogeography of the cave-obligate land snail Helicodiscus barri (Gastropoda, Stylommatophora, Helicodiscidae)

Gladstone¹,

Niemiller²,

Pieper³

et al. 2019

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Appendix A—Hydrology and physiography of limestone terranes

Swinnerton

1949

Eos Trans. AGU

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On April 28, 1947, a symposium was held as part of the Annual Meeting of the Section of Hydrology, American Geophysical Union, on the subject Ground‐water hydrology Of limestone terranes. The session was reported in the minutes of the Annual Meeting [Trans. Amer. Geophys. Union, v. 28, p. 511, 1947]. At least three of these papers have appeared. HAMILTON [1948] emphasized that the control of solutional activity is by joints and bedding planes and noted the greater extent to which solution has progressed in the valleys than in the interstream areas. MONEYMAKER [1948] states that there is extensive solution in the area, extending “hundreds of feet below the present water table” and controlled more by geologic structure than by the purity (sic) of the rock. He concludes that the solutional activity has been in progress for a very long time.

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The Effect of Solvent Motion on Limestone Solution

Kaye¹

1957

The Journal of Geology

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Some broad aspects of limestone solution in the Tennessee Valley

Cited by 3 publications

References 3 publications

Morphometrics and phylogeography of the cave-obligate land snail Helicodiscus barri (Gastropoda, Stylommatophora, Helicodiscidae)

Morphometrics and phylogeography of the cave-obligate land snail Helicodiscus barri (Gastropoda, Stylommatophora, Helicodiscidae)

Appendix A—Hydrology and physiography of limestone terranes

The Effect of Solvent Motion on Limestone Solution

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