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Danielopolina kornickeri sp. n . (Ostracoda, Thaumatocypridoidea) from a western Australian anchialine cave: morphology and evolution
Author(s) -
Danielopol Dan L.,
Baltanás Angel,
Humphreys William F.
Publication year - 2000
Publication title -
zoologica scripta
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.204
H-Index - 64
eISSN - 1463-6409
pISSN - 0300-3256
DOI - 10.1046/j.1463-6409.2000.00027.x
Subject(s) - biology , cave , cladistics , taxon , paleontology , clade , paleozoic , taxonomy (biology) , ecology , phylogenetics , zoology , biochemistry , gene
Danielopolina kornickeri sp. n . is described from an anchialine cave in Western Australia. This is the first Danielopolina species occurring outside of the Western Hemisphere (Atlantic and Eastern Pacific Oceans and Islands). A cladistic analysis indicates that this species is a primitive taxon of the anchialine cavernicolous clade; the deep‐sea dwelling species Danielopolina carolynae appears more primitive and does not cluster with the other Danielopolina species. The ecological environment of D. kornickeri is described. Detailed discussions consider: (1) the shell ornamentation and its relevance to the phylogeny of the Thaumatocyprididae; (2) the antero‐dorsal node of the Permian Thaumatomma (hypothesized here to be an ocular lens which regressed in the post‐Palaeozoic thaumatocypridids); (3) the distal chaetotaxy of the antennae (hypothesized to perform the chemosensorial function known in the aesthetascs of other myodocopids or podocopids); (4) palaeobiogeographical arguments for a shallow marine origin of cavernicolous species Danielopolina .