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Notes on two sympatric species of deep-water Vesicomyidae (Mollusca, Bivalvia) from the central Gulf of California, western Mexico
Hendrickx, M.E.; Valentich-Scott, P. (2018). Notes on two sympatric species of deep-water Vesicomyidae (Mollusca, Bivalvia) from the central Gulf of California, western Mexico. Pan-American Journal of Aquatic Sciences 13(3): 216-225
In: Pan-American Journal of Aquatic Sciences. PanamJAS: Montevideo. ISSN 1809-9009
Peer reviewed article  

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Trefwoorden
    Deep sea
    Calyptogena Dall, 1891 [WoRMS]; Pliocardia Woodring, 1925 [WoRMS]; Vesicomyidae Dall & Simpson, 1901 [WoRMS]; Wareniconcha Cosel & Olu, 2009 [WoRMS]
Author keywords
    Western Mexico; Calyptogena; Wareniconcha; Oxygen Minimum Zone;

Auteurs  Top 
  • Hendrickx, M.E.
  • Valentich-Scott, P.

Abstract
    Two sympatric species of deep-water Bivalvia are reported from the Gulf of California, below the Oxygen Minimum Zone. The most abundant species was Calyptogena lepta (385 living specimens, 102 dead shells). The second species, "Pliocardia" stearnsii, was much less abundant (5 living specimens, 6 dead shells). Environmental data indicates that both species can tolerate mild hypoxic conditions. Size distribution of C. lepta indicates that most specimens (75%) were in the intermediate size range (shell length: 13.50 to 23.49 mm). No difference in the length-height relationship (R2, 0.9803) was observed between smaller (minimum length, 8.56 mm) and larger (maximum length, 33.39 mm) specimens of this species.

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