Pliotrema Regan
Creators: name: Weigmann, Simon
name: Gon, Ofer
name: Leeney, Ruth H.
name: Barrowclift, Ellen
name: Berggren, Per
name: Jiddawi, Narriman
name: Temple, Andrew J.
Publisher: name: Zenodo
Year: 2020
Subjects: Biodiversity
Taxonomy
Animalia
Chordata
Elasmobranchii
Pristiophoriformes
Pristiophoridae
Pliotrema

description: Key to the valid species of <i>Pliotrema</i> <b>1a</b>. Five pairs of gill openings, large lateral rostral teeth smooth.. <b>..................................................................................</b>. <i>Pristiophorus</i> <b>1b</b>. Six pairs of gill openings, large lateral rostral teeth serrated (<i>Pliotrema</i>).. <b>....</b>... <b>................</b> &amp;nldr;.. <b>...................................................................</b> &amp;nldr; <b>2</b>. <b>2a</b>. 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.. <b>..................................</b> <i>Pliotrema warreni</i> [South Africa, southern Mozambique]. <b>2b</b>. 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.. <b>......................</b> &amp;nldr; <b>3</b>. <b>3a</b>. 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.. <b>...................... <i>Pliotrema kajae</i> sp. nov.</b> [Madagascar, Mascarene Ridge]. <b>3b</b>. 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.. <b>....................................................</b> &amp;nldr;... <b> <i>Pliotrema annae</i> sp. nov.</b> [Zanzibar].
description: Published as part of <i>Weigmann, Simon, Gon, Ofer, Leeney, Ruth H., Barrowclift, Ellen, Berggren, Per, Jiddawi, Narriman &amp; 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)</i> on page 53, DOI: 10.1371/journal.pone.0228791, http://zenodo.org/record/7415225