Leptomedusae

Aglaphenoia sp. in the Adriatic Sea

The Leptomedusae (synonyms: Thecata, Thecaphora, Leptothecata ) are cnidarians from the class of hydroids. All Leptomedusae live in the sea, even on European shores. To them, about 1900 species are counted.

Features

The polyp stage of the animals survived more colonial. Characteristic of the group that is the Peridermhülle includes not only the polyp body, but also the polyp head ( hydrant ) and surrounds him with a funnel-shaped Hydrotheca. However, this can be as short that the polyp can not retract it.

The Medusenstadium the Leptomedusae has flat screens, and have often balance organs in the velum. The gonads are located on the radial canals.

The Leptomedusae usually have more than four tentacles and never steno tele stinging cells.

System

The mentioned system follows the instructions of the Hydrozoa Directory.

  • Order Leptomedusae Subordination Conica Family Aequoreidae
  • Family Barcinidae
  • Family Blackfordiidae
  • Family Campanulinidae
  • Family Cirrholoveniidae
  • Family Clathrozoidae
  • Family Dipleurosomatidae
  • Family Eirenidae
  • Family Haleciidae
  • Family Hebellidae
  • Family Laodiceidae
  • Family Lovenellidae
  • Family Malagazziidae
  • Family Melicertidae
  • Family Mitrocomidae
  • Family Octocannoidae
  • Family Orchistomatidae
  • Family Phialellidae
  • Family Lafoeidae
  • Family Syntheciidae
  • Family Sugiuridae
  • Family Teclaiidae
  • Family Tiarannidae
  • Family Sertulariidae
  • Family Thyroscyphidae
  • Family Halopterididae
  • Family Kirchenpaueriidae
  • Nettle family ferns ( Plumulariidae )
  • Family Aglaopheniidae
  • Diplosoma
  • Family Bonneviellidae
  • Family Campanulariidae
  • Family Phialuciidae
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