Hydrozoa source details

Schuchert, P. (2004). Revision of the European athecate hydroids and their medusae (Hydrozoa, Cnidaria): families Oceanidae and Pachycordylidae. Revue Suisse de Zoologie. 111 2: 315-369.
Schuchert, P.
Revision of the European athecate hydroids and their medusae (Hydrozoa, Cnidaria): families Oceanidae and Pachycordylidae
Revue Suisse de Zoologie
111 2: 315-369
This paper reviews the European Hydrozoa species belonging to the families Oceanidae and Pachycordylidae. Emended diagnoses for the Oceanidae, the Pachycordylidae, and for some of their genera are provided. Due to the paucity of suitable characters, the macrotaxonomy of the two families is unsettled and must be regarded as provisional. The family Oceanidae includes the genera Cordylophora, Corydendrium, Merona, Oceania, Rhizogeton, Turritopsis, Turritopsoides, and the new genus Similomerona gen. n. The family Pachycordylidae includes the genera Pachycordyle and Silhouetta. Turritopsis polycirrha and T. dohrnii are both regarded as valid species and distinct from T. nutricula of the western Atlantic. Histological sections confirmed that Turritopsis polycirrha is hermaphroditic and larviparous, while T. nutricula is dioecious and oviparous. Turritopsis rubra (Farquhar, 1895) comb. n. from New Zealand is also regarded as a valid species and removed from synonymy with T. nutricula. The known distribution of Corydendrium dispar is extended to include the Faroe Islands. A former record of C. dispar from Denmark is referred to Pachycordyle navis (Millard, 1959) comb. n. Pachycordyle fusca Muller, 1913 is regarded as a likely synonym of Pachycordyle pusilla (Motz-Kossowska, 1905) comb. n. Descriptor: Similomerona gen. n.
Eastern Atlantic warm temperate to boreal
New Zealand
Systematics, Taxonomy
Zoogeography, Biogeography (generalities), Geographic distribution
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2013-01-12 18:30:12Z
2019-12-06 07:33:39Z

Cordylophora Allman, 1844 (redescription)
Cordylophora caspia (Pallas, 1771) (redescription)
Corydendrium Van Beneden, 1844 (redescription)
Corydendrium dispar Kramp, 1935 (redescription)
Corydendrium parasiticum (Linnaeus, 1767) (redescription)
Medusa sanguinolenta Modeer, 1791 accepted as Turritopsis polycirrha (Keferstein, 1862) (basis of record)
Merona Norman, 1865 (redescription)
Merona cornucopiae (Norman, 1864) (redescription)
Merona ibera Medel, García-Gómez & Bouillon, 1993 (status source)
Oceania Péron & Lesueur, 1810 (redescription)
Oceania armata Kölliker, 1853 (redescription)
Oceania sanguinolenta (Modeer, 1791) accepted as Turritopsis polycirrha (Keferstein, 1862) (status source)
Oceania tydemani Bleeker & van der Spoel, 1988 accepted as Oceania armata Kölliker, 1853 (status source)
Oceaniidae Eschscholtz, 1829 (redescription)
Pachycordyle napolitana Weismann, 1883 (redescription)
Pachycordyle navis (Millard, 1959) accepted as Pachycordyle michaeli (Berrill, 1948) (redescription)
Pachycordyle pusilla (Motz-Kossowska, 1905) (redescription)
Pachycordyle weissmani Hargitt, 1904 accepted as Pachycordyle napolitana Weismann, 1883 (source of synonymy)
Rhizogeton Agassiz, 1862 (redescription)
Rhizogeton nudus Broch, 1910 (redescription)
Similomerona Schuchert, 2004 (original description)
Similomerona nematophora (Antsulevich, 1986) (new combination reference)
Thieliana Stepanjants, Timoshkin, Anokhin & Napara, 2000 accepted as Pachycordyle Weismann, 1883 (source of synonymy)
Tubiclava Allman, 1863 (status source)
Tubiclava fruticosa Allman, 1872 (status source)
Tubiclava lucerna Allman, 1863 (status source)
Turritopsis McCrady, 1857 (redescription)
Turritopsis dohrnii (Weismann, 1883) (redescription)
Turritopsis nutricula McCrady, 1857 (additional source)
Turritopsis polycirrha (Keferstein, 1862) (redescription)
Turritopsis polynema Haeckel, 1879 accepted as Turritopsis polycirrha (Keferstein, 1862) (status source)
Turritopsis rubra (Farquhar, 1895) (redescription)

Erect, branching or stolonal hydroid colonies, monosiphonic or polysiphonic. In branching colonies, branches and ... [details]


This species has until 2004 been synonymized with T. nutricula McCrady, 1857, a medusa from the western Atlantic. ... [details]