#tanaidacea

One of the extremely cool guys from my samples

News - A new species of crustacean has been named after Rumiko Takahashi's martial-arts sex comedy Ranma 1/2 ! Hokkaido University Faculty of Science reported the discovery of a new species of tanaidacea: aspeudidae, found by Master's student Yoshinobu Matsushima and Dr. Keiichi Kakui. The shrimp-like creature was found to be both male and female; which lead to them deciding on the name "Apseudes ranma" after the main character of Ranma 1/2, Ranma Saotome, who becomes cursed to switch from a boy to a girl with a splash of water.

(Sources - 1, 2, 3, 4)

Order: Tanaidacea

Common Name: “tanaids”

Families: 36 - Apseudellidae, Apseudidae, Eucryptocaridae, Gigantapseudidae, Kalliapseudidae, Metapseudidae, Numbakullidae, Ophthalmapseudidae, Pagurapseudidae, Pagurapseudopsididae, Parapseudidae, Protoapseudoidae, Sphaeromapseudidae, Sphyrapodidae, Tanzanapseudidae, Whiteleggiidae, Neotanaidae, Agathotanaidae, Akanthophoreidae, Anarthruridae, Colletteidae, Cryptocopidae, Heterotanoididae, Leptocheliidae, Leptognathiidae, Mirandotanaidae, Nototanaidae, Paratanaidae, Pseudotanaidae, Pseudozeuxidae, Tanaellidae, Tanaissuidae, Tanaopsidae, Teleotanaidae, Typhlotanaidae, and Tanaididae

Anatomy: long and shrimp-like; carapace covers the first two segments of the thorax; three pairs of limbs on the thorax; a small pair of maxillipeds; a pair of large clawed gnathopods; a pair of pereiopods adapted for burrowing into mud; females have a marsupium

Diet: filter-feeders on detritus; some are also active predators

Habitat: most are marine; some found in freshwater; live buried in bottom sediment, sometimes in self-built tubes

Evolved in: Carboniferous

(source)

Propaganda under the cut:

Mysids (order Mysida) and amphipods (Amphipoda) have marsupiums! Quite fitting that mysids are also known as opossum shrimp!

Isopods (Isopoda) do also have marsupiums! Here’s a giant isopod and its babies inside of the brood pouch! These pouches are formed by plates called oostegites which extend from the basal parts of their thoracic appendages! All these orders in which the females have brood pouches are grouped under the superorder Peracardia! In most peracardians development is direct, the eggs which are brooded hatch directly into a post-larval, pre-juvenile stage called a manca which, while being similar to the adult lacks the last pair of legs (however amphipods are an exception to this rule, their eggs hatch directly into a juvenile stage).

Also, wanted to include this super cool order here, the Tanaidacea! They are lesser known, mostly benthic peracardians (most species know are marine, however some are freshwater)! They are known as tanaids and are quite cool, with one species (that I know of) , Hexapleomera urashima, living on loggerhead turtles(Carreta carreta)!

Idk the exact species these are, but I wanted to include a photo of a female with eggs in her pouch!

Tanaissus lilljeborgi

...a species of tanaid crustacean that has been recorded from the coasts of Northern Europe. Like other tanaids this species inhabits the top layers of intertidal and sublittoral sands and likely is a filter feeder.

Classification

Animalia-Arthropoda-Crustacea-Malacostraca-Peracarida-Tanaidacea-Tanaidomorpha-Nototanaidae-Tanaissus-T. lilljeborgi