Nomenclature
original description
(of Pectyllidae Haeckel, 1879) Haeckel, E. (1879). Das System der Medusen. Erster Teil einer Monographie der Medusen. <em>Denkschriften der Medicinisch-Naturwissenschaftlichen Gesellschaft zu Jena.</em> 1: XX+1-360, 320 plates., available online at https://www.biodiversitylibrary.org/page/32605578
page(s): 265 [details]
original description
(of Ptychogastridae Mayer, 1910) Mayer, A. G. 1910. Medusae of the world. Hydromedusae, Vols. I & II. Scyphomedusae, Vol III. Carnegie Institution, Washington. pp. 735, plates 1-76., available online at https://www.biodiversitylibrary.org/page/1327020
page(s): 371 [details] 
basis of record
Bouillon, J.; Boero, F. (2000). Synopsis of the families and genera of the Hydromedusae of the world, with a list of the worldwide species. <i>Thalassia Salent. 24</i>: 47-296 (look up in IMIS) [details]
Other
context source (Hexacorallia)
Fautin, Daphne G. (2013). Hexacorallians of the World. (look up in IMIS) [details]
Present
Inaccurate
Introduced: alien
Containing type locality
From editor or global species database
Diagnosis Trachymedusae with either simple manubrium without mesenteries, or with eight-lobed manubrium fixed by eight mesenteries to subumbrella; with either marginal tentacles grouped into more or less well defined clusters, some with adhesive disks, or with very numerous tentacles, not in clusters, but inserted at various levels on exumbrella; eight radialcanals, no centripetal canals or peduncle; with eight radial canals; gonads either attached onto manubrium on sides of the eight manubrial lobes, or on radial canals adjacent to manubrium; pendant statocysts. Bottom dwelling forms. [details]
Spelling Original spelling was Ptychogastridae, but correct name formation is Ptychogastriidae. [details]
From editor or global species database