Re-description of the genus Pseudobiotus (Eutardigrada, Hypsibiidae) and of the new type species Pseudobiotus kathmanae sp. n.

Citation
Dr. Nelson et al., Re-description of the genus Pseudobiotus (Eutardigrada, Hypsibiidae) and of the new type species Pseudobiotus kathmanae sp. n., ZOOL ANZ, 238(3-4), 1999, pp. 311-317
Citations number
15
Categorie Soggetti
Animal Sciences
Journal title
ZOOLOGISCHER ANZEIGER
ISSN journal
00445231 → ACNP
Volume
238
Issue
3-4
Year of publication
1999
Pages
311 - 317
Database
ISI
SICI code
0044-5231(199912)238:3-4<311:ROTGP(>2.0.ZU;2-C
Abstract
Re-examination of the lectotype of Macrobiotus augusti Murray, 1907 and the subsequent transfer of the species to Thulinia necessitated the designatio n of a new type species for the genus Pseudobiotus. We are describing Pseud obiotus kathmanae sp. n. as the proposed new type species since these were the original specimens used to describe the genus Pseudobiotus. The other t wo species are either very uncommon (P. matici) or described only from a ve ry short description of other authors and without type material (P, megalon yx). The presence of about 30 peribuccal lamellae, the shape and size of th e dorsal and ventral buccal apophyses (crests), and the Isohypsibius-type c law distinguish Pseudobiotus from other genera. Pseudobiotus kathmanae diff ers significantly from the other two species in the genus, P. matici (Pilat o, 1971) and P. megalonyx (Thulin, 1928), in a number of characters. The ne w species differs from P. matici particularly in the claws; the external an d internal claws of P. matici are markedly different in size and shape, whe reas they are similar in P. kathmanae. The number of macroplacoids easily d istinguishes P. megalonyx, which has only 2 macroplacoids (and the second i s peculiarly the longest), from P, kathmanae, which has 3.