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Redescription and morphological variability of Darwinula stevensoni (Brady & Robertson, 1870) (Crustacea, Ostracoda)
Rossetti, G.; Martens, K. (1996). Redescription and morphological variability of Darwinula stevensoni (Brady & Robertson, 1870) (Crustacea, Ostracoda). Bull. K. Belg. Inst. Nat. Wet. 66: 73-92
In: Bulletin. Institut Royal des Sciences Naturelles de Belgique. Mededelingen. Koninklijk Belgisch Instituut voor Natuurwetenschappen. KBIN: Brussel. ISSN 0368-0177, more
Peer reviewed article  

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Keywords
    Animal morphology; Taxonomy; Darwinula stevensoni (Brady & Robertson, 1870) [WoRMS]; Ostracoda [WoRMS]; Marine

Authors  Top 
  • Rossetti, G.
  • Martens, K., more

Abstract
    The species Darwinula stevensoni is extensively redescribed. Morphological variability of both valves and soft parts is assessed in several geographical and climatically distant populations and is found to be minimal or non-existant. Only size significantly varies between populations and this can be attributed to the differences in ambient temperatures during the larval development. Number and shape of muscle scars also vary, but this both within and between populations. Valve shape and chaetotaxy of limbs are remarkably constant. One female from an Italian population has aberrant Mx2-palps, but this specimen is considered a teratological case. Earlier records of males of D. stevensoni and the taxonomic position of the infraorder Darwinulocopina within the suborder Podocopina are briefly rediscussed. A hypothesis on biological strategy of darwinulids is tested using data on morphological variability and taxonomic diversity.

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