Glaciambulata Galea, gen. nov.

Genus Glaciambulata Galea, gen. nov. urn:lsid:zoobank.org:act:B2696364-D58F-4BB9-B326-DE244E1FA51A Type species Glaciambulata neumayeri gen. et sp. nov. Diagnosis Crawling medusae, unable to swim, possibly due to the absence of a velum. Umbrella watch glassshaped, margin entire, not lobed; exumbrell...

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Bibliographic Details
Main Authors: Horia R. Galea, Cornelia Roder, Christoph Walcher, Marco Warmuth, Eberhard Kohlberg, Philipp F. Fischer
Format: Other/Unknown Material
Language:unknown
Published: 2016
Subjects:
Biodiversity
Taxonomy
Animalia
Cnidaria
Hydrozoa
Trachymedusae
Ptychogastriidae
Glaciambulata
Glaciambulata neumayeri
Antarctic
Medusa
Antarc*
Online Access:https://zenodo.org/record/5628724
https://doi.org/10.5281/zenodo.5628724
Description
Summary:Genus Glaciambulata Galea, gen. nov. urn:lsid:zoobank.org:act:B2696364-D58F-4BB9-B326-DE244E1FA51A Type species Glaciambulata neumayeri gen. et sp. nov. Diagnosis Crawling medusae, unable to swim, possibly due to the absence of a velum. Umbrella watch glassshaped, margin entire, not lobed; exumbrella smooth; eight radial canals joining a circular canal; centripetal canals absent; manubrium eight-lobed, giving rise to eight perradial mesenteries; eight pairs of gonads, each of which is conFned to either side of a manubrial lobe; tentacles of two types, Fliform and adhesive, arranged in contiguous groups composed of several superimposed rows; 16 free, ectoendodermal statocysts (2 per octant). Etymology From the Latin words glăciēs, meaning ice, and ambŭlo, -āvī, -ātum, -āre, meaning to walk, making reference to the peculiar habit of this medusa. Remarks The Fat, smooth umbrella, and the absence of a velum immediately distinguish the new genus from Ptychogastria Allman, 1878 and Tesserogastria Beyer, 1959. The manubrial shape, the composition and arrangement of tentacles, the presence of mesenteries, and the shape and position of the gonads, are reminiscent of Ptychogastria. The presence of adhesive tentacles, and of 16 statocysts, instead of only 8, further distinguish it from Tesserogastria. Published as part of Horia R. Galea, Cornelia Roder, Christoph Walcher, Marco Warmuth, Eberhard Kohlberg & Philipp F. Fischer, 2016, Glaciambulata neumayeri gen. et sp. nov., a new Antarctic trachymedusa (Cnidaria: Hydrozoa), with a revision of the family Ptychogastriidae, pp. 1-30 in European Journal of Taxonomy 252 on page 5, DOI:10.5852/ejt.2016.252, http://zenodo.org/record/221250

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