Pliotrema Regan
| Autor: | Weigmann, Simon, Gon, Ofer, Leeney, Ruth H., Barrowclift, Ellen, Berggren, Per, Jiddawi, Narriman, Temple, Andrew J. |
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| Rok vydání: | 2020 |
| Předmět: | |
| DOI: | 10.5281/zenodo.7414876 |
| Popis: | Key to the valid species of Pliotrema 1a. Five pairs of gill openings, large lateral rostral teeth smooth.. ................................................................................... Pristiophorus 1b. Six pairs of gill openings, large lateral rostral teeth serrated (Pliotrema).. ....... ................ ‥.. ................................................................... ‥ 2. 2a. Barbels about two thirds way from rostral tip to mouth, with prebarbel length about twice distance from barbel origin to symphysis of upper jaw; rostrum not constricted between barbel origin and nostrils; a pronounced yellowish longitudinal stripe on dorsal surface.. .................................. Pliotrema warreni [South Africa, southern Mozambique]. 2b. Barbels about half way from rostral tip to mouth, with prebarbel length about equal to distance from barbel origin to symphysis of upper jaw; rostrum constricted between barbel origin and nostrils; dorsal surface without or with two longitudinal stripes.. ...................... ‥ 3. 3a. Snout long, head length 38.3–40.4% TL, preorbital length 25.7–27.3% TL, preoral length 28.6–31.3% TL, prebarbel length 14.8–16.2% TL, barbel origin to symphysis upper jaw 13.7– 15.0% TL; rostrum clearly constricted between barbel origin and nostrils; 21–31 large lateral rostral teeth; 38–43 upper jaw tooth rows, jaw teeth with sharp basal folds; pale to light brown dorsally with two yellowish stripes, uniform white ventrally, posterior fin margins with narrow white edges.. ...................... Pliotrema kajae sp. nov. [Madagascar, Mascarene Ridge]. 3b. Snout short, head length 34.2–34.5% TL, preorbital length 21.7–22.0% TL, preoral length 24.6–25.1% TL, prebarbel length 12.6–12.7% TL, barbel origin to symphysis upper jaw 12.1– 12.3% TL; rostrum only slightly constricted between barbel origin and nostrils; 16–17 large lateral rostral teeth; 35–37 upper jaw tooth rows, jaw teeth without basal folds; uniform medium to dark brown dorsally without longitudinal stripes, white ventrally but with few indistinct dark blotches on belly, posterior fin margins conspicuously white-edged.. .................................................... ‥... Pliotrema annae sp. nov. [Zanzibar]. Published as part of Weigmann, Simon, Gon, Ofer, Leeney, Ruth H., Barrowclift, Ellen, Berggren, Per, Jiddawi, Narriman & Temple, Andrew J., 2020, Revision of the sixgill sawsharks, genus Pliotrema (Chondrichthyes, Pristiophoriformes), with descriptions of two new species and a redescription of P. warreni Regan, pp. 1-56 in PLOS ONE 15 (3) on page 53, DOI: 10.1371/journal.pone.0228791, http://zenodo.org/record/7415225 |
| Databáze: | OpenAIRE |
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