Key character
Carapace with highly reticulate sculpture with spines at the posterior dorsal corner of both valves and tubercles at the posterior ventral corner, the armature of the male antennular e seta are paired needle-like spines (except in Conchoecossda imbricata, Conchoecissa imbricata 3). Five species:
¥ Conchoecossda imbricata (Brady , 1880) (Conchoecissa imbricata, Conchoecissa imbricata 2, Conchoecissa imbricata 3) which is a common middle latitude mesopelagic diel vertical migrant with long symmetrical extensions to the rostrum.
¥ Conchoecossda ametra (Müller, 1906) (Conchoecissa ametra, Conchoecissa ametra 2, Conchoecissa ametra 3) - a deep mesopelagic species with asymmetrical extensions to the rostrum.
¥ Conchoecossda plinthina (Müller, 1906) (Conchoecissa plinthina, Conchoecissa plinthina 2, Conchoecissa plinthina 3) - a very large deep-living species with small symmetrical developments of the rostra.
¥ Conchoecossda symmetrica (Müller, 1906) (Conchoecissa symmetrica, Conchoecissa symmetrica 2) - a high latitude deep-living, deep-bodied mesopelagic species with symmetrical rostra.
¥ Conchoecossda squamosa (Müller. 1906) (Conchoecissa squamosa, Conchoecissa squamosa 2) - a poorly known deep mesopelagic species with normal rostra.
Species information:
Genus Conchoecissa.pct