Eucytherura indianensis Michael 1995, n.sp.
Creators: name: Ayress, M. A.
name: Whatley, R.
name: Downing, S. E.
name: Millson, K. J.
Publisher: name: Zenodo
Year: 1995
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Ostracoda
Podocopida
Cytheruridae
Eucytherura
Eucytherura indianensis

description: <i>Eucytherura indianensis</i> n.sp. <i>"</i> <i>Eucytherura indianensis"</i> Ayress, 1988 *: 611; pI. 21, figs 12 -17. Etymology. From its occurrence in the Indian Ocean. Type material and dimensions. Holotype, OS 14068, adult left valve, length 0.35 mm, height 0.23 mm. Paratypes: OS 14069, adult right valve, length 0.37 mm, height 0.23 mm, Site 254, core 1, section 2, interval 20- 26 cm, Pleistocene; OS 14070, adult right valve, length 0.37, height 0.23 mm, Site 254, core 1, section 3, interval 50- 56 cm, Pleistocene. Type locality and horizon. East Indian Ocean, southern limit of Ninetyeast Ridge, present day water depth 1253 m, DSDP Site 254, core 1, section 2, interval 20-26 cm, Pleistocene. Diagnosis. A species of <i>Eucytherura</i> with a very bluntly convex anterior margin and very short sub-dorsal caudal process. Coarsely reticulate with polygonal fossae; muri bear short conjunctive and disjunctive lateral spines and inwardly directed spines. Anterior half of ventral surface microreticulate. Low mid-anterior ridge extends onto posteroventral tumidity. Description. Small, sub-quadrate in lateral view. Anterior margin bluntly convex; posterior margin with short caudal process just above mid-height. Dorsal margin straight to slightly undulating with distinct anterior cardinal angle. Ventral margin tapers upwards posteriorly, interrupted by posteroventral tumidity which overhangs and overreaches ventral margin. Lateral surface coarsely reticulate: fossae deep and polygonal, muri bear short, blunt conjunctive and disjunctive spines and fine inwardly directed spines. Low ridge extends longitudinally through mid-anterior and obliquely across ventral tumidity, interrupted medianly by thickened mural strut associated with adductor muscle scars. A second low arcuate ventro-lateral ridge borders a sub-ovate microreticulate region in anterior half of ventral surface. Internal surface with clusters of 6-7 perforations. Other internal features as for genus. <b>Comparisons.</b> The species is similar to <i>E. calabra</i> (Colalongo &amp; Pasini), but differs from that species in having much shorter spines and a microreticulate anteroventral surface. In this latter respect it is similar to <i>E. tumida</i> n.sp., however, that species lacks spines or ridges and the cells of the microreticulation are more ordered. <b>Distribution.</b> Found only in the Late Pliocene to Pleistocene ofDSDP Site 254 on the Ninetyeast Ridge, eastern Indian Ocean.
description: Published as part of <i>Ayress, M. A., Whatley, R., Downing, S. E. &amp; Millson, K. J., 1995, Cainozoic and from Recent Deep Sea Cytherurid Ostracoda the South Western Pacific and Eastern Indian Oceans, Part Cytherurinae, pp. 203-223 in Records of the Australian Museum 47 (2)</i> on pages 212-213, DOI: 10.3853/j.0067-1975.47.1995.237, http://zenodo.org/record/4660625
description: {"references": ["Ayress, M., 1988. Late Pliocene to Quaternary deep-sea Ostracoda from the eastern Indian and Southwestern Pacific Oceans. Unpublished Ph. D. thesis, University College of Wales, Aberystwyth, 1203 pp."]}