Ptychogastria Allman 1878 ...
Genus Ptychogastria Allman, 1878 Pectyllis Haeckel, 1879: 265. Pectanthis Haeckel, 1879: 267. Pectyllis – Haeckel 1881a: 9; 1881b: 10. Pectanthis – Haeckel 1881a: 17; 1881b: 19. Diagnosis Crawling ptychogastriid medusae with swimming capabilities; with dome-shaped, marginally-“lobed” umbrella, and e...
| Main Authors: | , , , , , |
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| Format: | Text |
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Zenodo
2016
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| Online Access: | https://dx.doi.org/10.5281/zenodo.5628728 https://zenodo.org/doi/10.5281/zenodo.5628728 |
| Summary: | Genus Ptychogastria Allman, 1878 Pectyllis Haeckel, 1879: 265. Pectanthis Haeckel, 1879: 267. Pectyllis – Haeckel 1881a: 9; 1881b: 10. Pectanthis – Haeckel 1881a: 17; 1881b: 19. Diagnosis Crawling ptychogastriid medusae with swimming capabilities; with dome-shaped, marginally-“lobed” umbrella, and eight-lobed manubrium, giving rise to as many mesenterial partitions of the subumbrellar cavity; mouth quadrangular, with simple lips; eight radial canals; centripetal canals either present or absent; eight pairs of gonads conFned to the sides of the manubrial lobes; tentacles Fliform and adhesive, occurring simultaneously and arranged in clusters around the bell margin; velum broad; 16 free, ectoendodermal statocysts (2 per octant). Remarks The diagnoses given by Bouillon & Boero (2000) and Bouillon et al. (2006) are broadened again, so as to include the shape of the umbrella, the presence/absence of centripetal canals, and the presence of a velum, as Allman (1878) and/or Mayer (1910) did earlier. As ... : 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 11, DOI: 10.5852/ejt.2016.252, http://zenodo.org/record/221250 ... |
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