Medusozoa

Belongs within: Cnidaria.Contains: Staurozoa, Cubozoa, Scyphozoa, Limnomedusae, Narcomedusae, Trachymedusae, Halammohydra, Thecata, Capitata, Filifera, Codonophora. The Medusozoa are the clade of cnidarians in which a medusa, whether free or reduced, is the normal sexual adult stage of the life cycle and a polyp (if present) functions as the larval stage (Petersen 1979). Subgroups include the Hydrozoa… Continue reading Medusozoa

Cuticulata

Belongs within: Metridioidea.Contains: Hormathiidae. Anemones with fine cuticles Published 26 July 2023 For all their familiarity to anyone who has spent much time observing life on the seashore, sea anemones can be a surprisingly difficult group of animals to define. Only a single feature distinctive to the order has been identified to date: the presence… Continue reading Cuticulata

Faviinae

Belongs within: Faviina. A brain explosion Published 3 September 2012 For today’s random taxon, I drew the Faviinae. This is a subfamily within the Faviidae, commonly known as ‘brain corals’ and recognised as an important family among the tropical reef-builders. Families of corals have generally been distinguished by the arrangement and morphology of skeletal structures… Continue reading Faviinae

Sertularia

Belongs within: Sertulariidae. Sertularia is a genus of colonial hydroids in which the hydrothecal operculum is divided with the abcauline component being movable (Ralph 1961). Characters (from Ralph 1961): Erect stems branched or simple, monosiphonic; hydrothecae in opposite or subopposite pairs or alternate; margin usually with two abcauline teeth between each of which there is… Continue reading Sertularia

Published
Categorised as Medusozoa

Tubulariida

Belongs within: Capitata.Contains: Corynoidea, Tubulariidae. The Tubulariida are a group of hydroids characterised by the tendency for the oral whorl(s) of tentacles to become emphasised over the aboral tentacles. The majority (at least) of tubulariidans may form a clade Aplanulata, characterised by the absence of a ciliated planula larva (Daly et al. 2007). Characters (from… Continue reading Tubulariida

Published
Categorised as Medusozoa

Capitata

Belongs within: Medusozoa.Contains: Tubulariida, Zancleida. The Capitata are a group of hydrozoans united by the possession of stenotele nematocysts and capitate tentacles (ending in knobs) on the polyps or filiform tentacles in separated whorls (Daly et al. 2007). Members of the suborder Moerisiida possess a single, more or less scattered whorl of moniliform tentacles on… Continue reading Capitata

Published
Categorised as Medusozoa

Faviina

Belongs within: Scleractinia.Contains: Faviinae, Merulinidae, Mussidae, Pectiniidae, Fungiicae, Montastreinae, Madrepora. The Faviina are a group of corals characterised by septa formed of one or more fan systems of simple or compound trabeculae, with synapticulae absent and disseptiments well developed. Septal margins are regularly dentate (Cairns 2002). Representatives include the Oculinidae in which corallites are widely… Continue reading Faviina

Published
Categorised as Anthozoa

Tubulariidae

Belongs within: Tubulariida. The Tubulariidae include both solitary and colonial hydroids in which the tentacles of both whorls are filiform and a stem parenchyma including central and peripheral canals is present (Petersen 1979). <==Tubulariidae |–Zyzzyzus solitarius (Warren 1906)P79 |–Ectopleura Agassiz 1862P79 | |–*E. dumortieri (van Beneden 1844)P79 | |–E. crocea (Agassiz 1862)P79 [=Tubularia croceaP79; incl.… Continue reading Tubulariidae

Published
Categorised as Medusozoa

Octocorallia

Belongs within: Anthozoa.Contains: Nephtheidae, Gorgoniidae, Calcaxonia, Alcyoniidae, Plexauridae. The Octocorallia, octocorals, are a well-defined group of mostly colonial cnidarians with polyps with eight tentacles and eight mesenteries, and often with pinnules on the tentacles (Daly et al. 2007). Past classifications of the octocorals have often recognised a distinction between the Gorgonaria (with a horny or… Continue reading Octocorallia

Published
Categorised as Anthozoa

Madrepora

Belongs within: Faviina. Madrepora is a genus of stony corals forming branched colonies. <==Madrepora Linnaeus 1758L58 |–M. (Madrepora)G20 | |–M. (M.) damicornisG20 | |–M. (M.) oculata Linnaeus 1758G20, L58 | `–M. (M.) prolifera [incl. M. muricata]G20 `–M. (Explanaria)G20 |–M. (E.) conglomerataG20 `–M. (E.) infundibulumG20 Madrepora incertae sedis: M. acetabulum Linnaeus 1758L58 M. ananas Linnaeus 1758L58… Continue reading Madrepora

Published
Categorised as Anthozoa