WoRMS taxon details
original description
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): 199; note: introdcued as Irenidae, which is an icorrectly formed name [details]
original description
(of Eutimidae 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): 190 [details]
original description
(of Irenidae 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): 199 [details]
context source (Hexacorallia)
Fautin, Daphne G. (2013). Hexacorallians of the World. (look up in IMIS) [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]
From editor or global species database
Diagnosis Medusa manubrium small, usually on rather well differentiated gastric peduncle; 4-6 simple radial canals running from circular canal across underside of bell and along peduncle to manubrium; bulbs with or without excretory papillae; margin with or without cirri or marginal warts; gonads on radial canals, separated from manubriuml; 8 to many statocysts; without ocelli.
The hydroids of the Eirenidae can be of 'Campanulina', 'Campanopsis' or 'Eugymnanthea' type. Hydroid colony of benthic species stolonal or ramified erect; bivalve-inhabiting species without perisarc, with pedal disc, usually solitary; planktonic species solitary, polyp budding totally into a single medusa; hydrotheca cylindrical in young colonies of erect forms, with diaphragm and folded pleated operculum formed by convergent flaps not demarcated from the hydrothecal rim; in older colonies of this type, operculum generally lost and hydrotheca reduced to perisarcal collar, of haleciid type; hydrotheca usually reduced or absent in stolonal colonies, hydranth naked, borne directly on hydrorhiza or on short pedicels; hydranth of commensal species elongated, extensile, with filiform tentacles in a single amphicoronate whorl; intertentacular web present; gonophores on hydranths, hydrocaulus, or hydrorhiza, naked or more usually at least initially in a gonotheca, in form of medusae or medusoids with gonads on radial canals. [details]
From editor or global species database
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