Eumarcia

Eumarcia fumigata, photographed by Denis Riek.

Belongs within: Veneridae.

Eumarcia is a genus of venerid bivalves found from the Oligocene to the present of Australia and New Zealand. The genus is divided into two subgenera, Eumarcia (Eumarcia) with a superficial lunule and escutcheon and no concentric grooves on the shell surface, and Atamarcia with a well-impressed lunule and escutcheon and generally strong concentric grooves on the shell surface (Marwick 1927).

Characters (from Marwick 1927): Shell moderate to large size, oval, margins smooth, pallial sinus ample.

<==Eumarcia Iredale 1925 M27
    |--E. (Eumarcia) M27
    |    |--*E. (E.) fumigata [=Venus fumigata; incl. V. nitida] M27
    |    |--E. (E.) altilunula Marwick 1927 M27
    |    |--E. (E.) kaawaensis Marwick 1927 M27
    |    |--E. (E.) pareoraensis (Suter 1917) [=Macrocallista pareoraensis] M27
    |    `--E. (E.) plana Marwick 1927 M27
    `--E. (Atamarcia Marwick 1927) M27
         |--E. (*A.) sulcifera Marwick 1927 M27
         |--E. (A.) benhami Marwick 1927 (see below for synonymy) M27
         |--E. (A.) crassa Marwick 1927 M27
         |--E. (A.) crassatelliformis Marwick 1927 M27
         |--E. (A.) curta (Hutton 1873) [=Tapes curta, Paphia (Ruditapes) curta] M27
         |--E. (A.) enysi (Hutton 1873) [=Cytherea enysi] M27
         |--E. (A.) thomsoni Marwick 1927 M27
         `--E. (A.) trigonalis Marwick 1927 M27

Eumarcia (Atamarcia) benhami Marwick 1927 [=Venus sulcata Hutton 1875 non Lamarck 1835, Cytherea (Circomphalus) sulcata] M27

*Type species of generic name indicated

REFERENCES

[M27] Marwick, J. 1927. The Veneridae of New Zealand. Transactions and Proceedings of the New Zealand Institute 57: 567-636.