Pseudoliparis swirei Gerringer & Linley & Jamieson & Goetze & Drazen 2017, sp. nov.

• Main Authors: Gerringer, Mackenzie E., Linley, Thomas D., Jamieson, Alan J., Goetze, Erica, Drazen, Jeffrey C.
• Format: Other/Unknown Material
• Language: unknown
• Published: Zenodo 2017
• Subjects: Biodiversity; Taxonomy; Animalia; Chordata; Actinopterygii; Scorpaeniformes; Liparidae; Pseudoliparis; Pseudoliparis swirei; Kamchatka
• Online Access: https://doi.org/10.5281/zenodo.6016523; http://treatment.plazi.org/id/0391DE73FF98FF9198B7FA6F5F959253

Pseudoliparis swirei Gerringer & Linley sp. nov. Figures 2, 3, 4, 5; Tables 2, 3 Mariana snailfish: Linley et al. 2016 (page 105, Figure 4a) Mariana snailfish: Linley et al . 2017 (page 42, Figure 6.43) Mariana snailfish/Mariana liparid: Gerringer et al. 2017a (page 111) Mariana liparid/ Liparidae sp. nov: Gerringer et al. 2017b (page 137) Diagnosis. Andriashev and Pitruk (1993) define the genus Pseudoliparis as having a well-developed disk and one pair of nostrils and lacking pseudobranchia and pleural ribs, with four radials in the pectoral girdle, which has neither notches nor fenestrae. In this genus, the hypural plate is divided by a distal slit (Andriashev and Pitruk, 1993). Like the other in this genus, Pseudoliparis swirei sp. nov. (Figures 2, 3) displays these characters, including a moderately well-developed disk, although this is easily damaged in collection. Pseudoliparis swirei sp. nov. can be distinguished from the two other known Pseudoliparis species with the following characters. Pseudoliparis swirei sp. nov. differs from P. belyaevi in the presence of a distinct lower pectoral-fin lobe, similar to that seen in P. amblystomopsis (Andriashev, 1955). Pseudoliparis swirei has more dorsal-fin rays 55 (51–58) than P. amblystomopsis 49 (49–52), more anal-fin rays 48 (43–49) compared to 43 (42–45), and more vertebrae 61 (56– 62), compared to 55–57, although these ranges somewhat overlap. Head length is shorter in P. swirei sp. nov. (17.0–21.7 %SL) than P. amblystomopsis (21.6–24.0 %SL). Comparisons were made according to ranges presented by Andriashev & Pitruk (1993). Pseudoliparis belyaevi is known only from the Japan Trench, P. amblystomopsis from the Japan and Kurile-Kamchatka trenches, P. swirei only from the Mariana Trench. Description. Vertebrae 61 (56–62), dorsal-fin rays 55 (51–58), anal-fin rays 48 (43–49), caudal-fin rays 13 (11–14), pectoral-fin rays 30 (28–32), pectoral radials 4, pyloric caeca 7 (5–9). Ranges of measurements and counts are presented in Table 2. Ratios are presented ...