Cobanocythere

Features of Cobanocythere labiata, from Hartmann (1959). 117: Right valve; 118: hinge; 119: end of body; 120: female antenna; 121: male copulatory organ.


Belongs within: Cytheroidea.

Cobanocythere is a genus of marine interstitial ostracods found around the world. Members of this genus are united by the presence of three adductor muscle scars, a rudimentary or absent bracnhial plate on the mandible, and a copulatory organ with a ventro-median extension and short penis. The genera Microcytheridea and Platymicrocythere, each previously distinguished by features of the external shell, share these characteristics and hence were synonymised by Gottwald (1983).

Characters (from Hartmann 1959*): Shell similar to Microcythere, with large radial pore canals; hinge with cardinal teeth or bar. Eyes reduced. Distinct adductor muscle scars. First antenna 6-segmented; distalmost segment reduced. Second antenna 4-segmented, distally with one large and one small seta. Mandibular palp slender, 3-segmented; basis of mandible with long tooth and several shorter teeth. Maxilla with small exopod, with only a few rays. Maxilliped well-developed, exopod one-segmented, distal segment not developed. Bristles of maxilliped and exopod slim and long. Thoracopods 4-segmented.

*Translated from original German with the help of Google Translate; any errors of translation are my own.

<==Cobanocythere Hartmann 1959 DH86 [incl. Microcytheridea Hartmann 1965 G83, Platymicrocythere Schormikov 1975 G83]
    |  i. s.: C. angularis Gottwald & Scherner 1980 DH86
    |         C. axi Gottwald 1983 DH86
    |         C. chilensis Gottwald 1983 [=Microcytheridea labiata Hartmann 1965 non C. labiata Hartmann 1959] DH86
    |         C. cuneiformis Hartmann 1974 DH86
    |         C. hartmanni Reys 1961 DH86
    |         C. longiantennata (Marinov 1962) DH86 [=Microcythere longiantennata G83]
    |         ‘Microcythere’ subterranea Hartmann 1954 [=Cobanocythere parva Gottwald 1983] DH86
    |         C. subterranoides Hartmann 1974 DH86
    |         C. syltensis Gottwald 1983 DH86
    |--C. elongata Gottwald 1983 G83
    |--C. guttaeformis Gottwald 1983 G83
    |--C. santacruzensis Gottwald 1983 G83
    |--+--*C. ‘subterranea’ Hartmann 1959 non Microcythere subterranea Hartmann 1954 G83
    |  |--C. arenicola Gottwald 1983 G83
    |  `--C. japonica Schornikov 1975 G83
    |--+--C. tokiokai (Schornikov 1975) [=Platymicrocythere tokiokai] G83
    |  `--+--C. labiata Hartmann 1959 G83
    |     `--C. mielkei Gottwald 1983 G83
    `--+--C. fernandinensis Gottwald 1983 G83
       |--C. hoodensis Gottwald 1983 G83
       |--C. lanceolata Gottwald 1983 G83
       |--C. pacifica Gottwald 1983 G83
       |--C. psammophila Gottwald 1983 G83
       `--C. sublitoralis Gottwald 1983 G83

*Type species of generic name indicated

REFERENCES

[DH86] Danielopol, D. L., & G. Hartmann. 1986. Ostracoda. In: Botosaneanu, L. (ed.) Stygofauna Mundi: A Faunistic, Distributional, and Ecological Synthesis of the World Fauna inhabiting Subterranean Waters (including the Marine Interstitial) pp. 265–294. E. J. Brill/Dr. W. Backhuys: Leiden.

[G83] Gottwald, J. 1983. Interstitielle Fauna von Galapagos. XXX. Podocopida 1 (Ostracoda). Mikrofauna des Meeresbodens 90: 1–187.

Hartmann, G. 1959. Zur Kenntnis der lotischen Lebensbereiche der pazifischen K├╝ste von El Salvador unter besonderer Ber├╝cksichtigung seiner Ostracodenfauna. Kieler Meeresforschungen 76 (2): 187–241.

No comments:

Post a Comment

Markup Key:
- <b>bold</b> = bold
- <i>italic</i> = italic
- <a href="http://www.fieldofscience.com/">FoS</a> = FoS