Tesserogastria Beyer, 1959

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, European Journal of Taxonomy 252, pp. 1-30 : 16

Genus Tesserogastria Beyer, 1959

Diagnosis

Crawling medusae with swimming capabilities; umbrella bell-shaped, margin thickened, provided with a great number of solid, Fliform tentacles inserted at varied levels, apparently not forming distinct rows or clusters; manubrium cross-shaped, with four perradial lobes; gastric peduncle, pouches and mesenteries absent; 8 radial canals join the broad ring canal; centripetal canals absent; four pairs of elongated gonads, one to each manubrial lobe; velum well-developed; 8 free, ecto-endodermal statocysts (2 per octant).

Remarks

The absence of both mesenteries and adhesive tentacles, as well as the shape and position of the gonads, immediately distinguish this genus from both Glaciambulata gen. nov. and Ptychogastria Allman, 1878 .