#trachylinae

[animalids]

Psychedelic medusa (Crossota millsae)

Photo by NOAA

[cognitionaturae-blog]

Kunstformen der Natur, 1904, Ernst HAECKEL

Narcomedusae lithography 16

Haeckel’s original taxonomy

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Eukaryota

Animalia

Cnidaria

Hydrozoa

Trachylinae

Narcomedusae

Tree of Life Web Project’s taxonomy

[astronomy-to-zoology]

Botrynema ellinorae

...is a species of Halicreatid hydrozoan which is typically encountered in the mesopelagic and bathypelagic zones of the Arctic ocean at depths of around (400 to 1,400 m). However it is also been recorded in subarctic regions of the Atlantic Ocean as well. B. ellinorae is poorly researched and as such its diet and ecology is not known, it is thought that B. ellinorae lacks a polyp stage and is holoplanktonic.

Classification

Animalia-Cnidaria-Hydrozoa-Trachylinae-Trachymedusae-Halicreatidae-Botrynema-B. ellinorae

Image: Kevin Raskoff

[astronomy-to-zoology]

Aegina citrea

Sometimes known as the "Golf Tee Medusa" Aegina citrea is a species of Aeginid hydrozoan that boasts a cosmopolitan distribution throughout the Atlantic and Pacific oceans. Like other many other cnidarians Aegina citrea is a planktonic 'predator' feeding on small invertebrates and other organisms. 

Classification

Animalia-Cnidaria-Hydrozoa-Trachylinae-Narcomedusae-Aeginidae-Aegina-A. citrea

Images: ©Robert Lee

[astronomy-to-zoology]

Genus: Crossota

...a genus of rhopalonematid hydrozoans that are widespread throughout all oceans. Unlike some other hydrozoans (and like trachymedusae) members of Crossota do not have a sessile larval stage. Instead they spend their entire lives in the water column as "plankton". Once they reach adulthood as medusae they will feed on zooplankton which are dispatched via nematocysts.

Classification

Animalia-Cnidaria-Medusozoa-Hydrozoa-Trachylinae-Trachymedusae-Rhopalonemtidae-Crossata

Image: Kevin Raskoff, NOAA Photo Library