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25 results for “Abra”
Figure 3 from: Espinasa L, D. Bartolo N, E. Newkirk C (2014) DNA sequences of troglobitic nicoletiid insects support Sierra de El Abra and the Sierra de Guatemala as a single biogeographical area: Implications for Astyanax. Subterranean Biology 13: 35-44. https://doi.org/10.3897/subtbiol.13.7256
Figure 3 - Base pair differences versus estimates of divergence in nicoletiids. Base pair differences in the 16S rRNA fragment is plotted against estimates of divergence times millions of years ago (Mya). Molecular clock calibrating points were extracted from: a populations of Anelpistina musticensis that got separated into different islands when the sea level rose after glacial times 12,000 years ago (Espinasa et al. 2011) b and c species of Prosthecina and d species of Anelpistina from Baja California that got separated from the mainland species when the Gulf of Cortes formed 5 mya (Espinasa et al. 2009) e time when nicoletiids arose from a common ancestor with Lepismatids 302 mya (Regier et al. 2010), and f time when insects arose from a common ancestor with anostraca in the Silurian-Ordovician boundary 427 mya (Gaunt and Miles 2002). The lower arrow indicates the 11–12 bp differences between the Sierra de Guatemala and the Sierra de El Abra Anelpistina populations. Such sequence difference is consistent with a common origin very recently, less than 12,000 years ago, and therefore after the environmental disturbances of the ice age.
Figure 2 from: Espinasa L, D. Bartolo N, E. Newkirk C (2014) DNA sequences of troglobitic nicoletiid insects support Sierra de El Abra and the Sierra de Guatemala as a single biogeographical area: Implications for Astyanax. Subterranean Biology 13: 35-44. https://doi.org/10.3897/subtbiol.13.7256
Figure 2 - Anelpistina quinterensis is one of the most troglomorphic described species of nicoletiids. This relatively large eyeless insect is albino and has extremely elongated appendages. Its habitat is restricted to very humid portions of the caves such as mud banks. It is doubtful that it can survive in an epigean environment. Its habitat probably reflects connectivity within a karstic area throughout geologic times and during the evolutionary history of the species.
Figure 1 from: Espinasa L, D. Bartolo N, E. Newkirk C (2014) DNA sequences of troglobitic nicoletiid insects support Sierra de El Abra and the Sierra de Guatemala as a single biogeographical area: Implications for Astyanax. Subterranean Biology 13: 35-44. https://doi.org/10.3897/subtbiol.13.7256
Figure 1 - The Cañon de la Servilleta of the River Boquillas separates the contiguous Sierra de Guatemala, to the north, from the Sierra de El Abra, in the south. Limestone is restricted to the green forested hills. This study tested if this 100 m high, 100 m wide canyon was an effective biological barrier that prevented underground migration of troglobites between the two karstic areas.
Supplementary material 1 from: Miranda-Gamboa R, Espinasa L, Verde-Ramírez MA, Hernández-Lozano J, Lacaille JL, Espinasa M, Ornelas-García CP (2023) A new cave population of Astyanax mexicanus from Northern Sierra de El Abra, Tamaulipas, Mexico. Subterranean Biology 45: 95-117. https://doi.org/10.3897/subtbiol.45.98434
DNA sequence oF the mitochondrial 16S rRNA
ABRA Abdominal Closure System in Open Abdomen Management
ClinicalTrials.gov study NCT00754156. IPD Sharing: Not stated. Countries: 1. Publications: 0.
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