Müller, 1906

Diagnosis
Small member of the rotundata group. Carapace dorsal margin straight, posterior and ventral margins smoothly curved (C. pusilla Habitus 1, C. pusilla Habitus 3). Right asymmetrical gland opening at the tip of a low angled process just below the postero-dorsal corner. Left asymmetrical gland opening just behind the anterior end of the hinge.
Female, frontal organ, undifferentiated, straight and bare (C. pusilla 1).
Male, frontal organ swollen at the end (C. pusilla 3). First antenna "e" seta armature eight pairs of spines giving way proximally to a further ten which alternate (C. pusilla 4).

Remarks
Immediately distinguishable from all other species in the rotundata group by the angled process on which the right asymmetrical gland opens, except for C. macromma (not found in U.K. waters) which is larger and whose left asymmetrical gland opens almost a third of the carapace length posteriorly of the tip of the rostrum.

Distribution
One of the commonest species at deep mesopelagic and shallow bathypelagic depths in all oceans. 60°N-64°S in Atlantic. 1, 2, 3 (R.R.S. Discovery Map).

Type specimens
None designated; status of original material uncertain.

Type locality
Original material from widely dispersed stations in the Indian and Atlantic Oceans.

Kingdom Animalia
Phylum Arthropoda
Class Crustacea
Subclass Ostracoda
Order Myodocopida
Suborder Halocypridina
Family Halocyprididae
Subfamily Conchoecinae
Genus Conchoecia
Species Conchoecia pusilla

Status in World Register of Marine Species

Not included in WoRMS database

Scientific synonyms and common names

(= Metaconchoecia pusilla - see explanation in diagnosis of genus Conchoecia).

Conchoecia pusilla Müller, 1906a; p. 80, Pl.16, Figs. 30, 31, 34-27, Pl. 17, Figs. 35, 36.
Metaconchoecia pusilla

Müller, G. W. 1906. Ostracoda. Wissenschaftliche Ergebnisse der DeutscheTiefsee-Expedition auf dem Dampfer "Valdivia" 1898-1899, 8, 29-154.

You can continue searching for Conchoecia pusilla on one of these Web sites:

Fauna Europaea (animals) | IOPI (plants) | NCBI (genetic)

Google | Yahoo | MSN | Wikipedia