Eucytherura Muller 1894
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

description: <i>Eucytherura</i> Muller, 1894 Type species. <i>Cythere complexa</i> Brady, 1867. Emended Diagnosis. A genus of the subfamily Cytherurinae with a small carapace of subrectangular, quadrate or subtriangular lateral outline. Ventral margin gently sinuous, often obscured by posteroventral tumidity or tubercle. Eye tubercle present or absent. Surface very ornate with reticulation, tubercles and ridges. Normal pore canals usually of two types: those emergent through mural pore conuli; and those arranged in groups through the solum of the reticulation. Muscle scars consist of four subovate adductor scars in a vertical row and a subreniform frontal scar ahead of the row. Hinge, in right valve, consists of a small but prominent circular or ovate tooth on anterior and posterior ends, with a finely locellate median groove very narrow at midlength and often flexured or sinuous. Comparisons. Our concept of <i>Eucytherura</i> indicated in the above emended diagnosis allows us to synonymise <i>Typhlocythere</i> Bonaduce, Ciampo &amp; Masoli, 1975, <i>Typhloeucytherura</i> Colalongo &amp; Pasini, 1980 and <i>Parahemingwayella</i> Dingle, 1984. These three genera were proposed mainly to accommodate the fact that they differ from <i>Eucytherura</i> (as presently diagnosed by Weingeist, 1949) in lacking eyes. Deep sea taxa always lack eyes as a result of living in an aphotic environment. Consequently, this feature cannot be used to recognise genera in the deep sea. It may well be that blindness of these genera in shallow environments had preadapted them for deeper water existence, but we can find no consistent features which might reveal their separate generic identity. Previous workers have stressed the importance of certain features for generic identification such as inflation and outline, absence of dorsal ridges or tubercles and nature of ornament. We recognise these features as being variable in number or nature, and moreover, as occurring in variable combination in different species. For this reason, we prefer to retain species previously assigned to <i>Parahemingwayella, Typhlocythere</i> and <i>Typhloeucytherura</i> within <i>Eucytherura.</i> The latter genus can be separated from <i>Hemiparacytheridea</i> by virtue of its hingement, having a distinct ovate posterior terminal element, and its solum pore clusters. Key to Deep-sea Species of <i>Eucytherura</i> 1. --Normal pores large and regularly distributed, valve size small.................................................2 2. Weakly inflated; ornament predominantly reticulation.............................................. <i>anoda</i> --Moderately well inflated; ornament of ridges and reticulation.................................................3 3. Alate; subcentral tubercle present; surface ridges distinct............................. E. <i>polydictyota</i> --Not alate; subcentral tubercle absent; surface ridges diffuse............................... <i>E.</i> <i>boomeri</i> 4. --Lateral outline subrhomboidal, subquadrate or subrectangular................................................. 8 5. --Singleposteroventral swelling;surface stronglyspinose spinose...................................E. TODO <i>elegantula</i> 6. Subcentral tubercle high on lateral surface; deep concavity indorsalmargin.............................................................................................. <i>Eucytherurasp.3</i> -- Posterodorsal tubercle or ridge present; strong anterior marginal rim.................................. . --Posterodorsaltubercle orridge absent; weak anteriormarginal marginal TODO TODO TODO <i>batalaria</i> 7. Dorsal margin sinuous; reticulation well developed with extensive ventral microreticulation................................................................... <i>E. parabatalaria</i> --Dorsal margin gently convex; reticulation relatively irregular with only poorly developed ventral microreticulation.......................................E. <i>downingae</i> 8. <i>multituberculate</i> --Tubercles not well developed or absent....................................................................................9 9. I 10. --Carapace moderately inflated, may have intrafossal spines.................................................l3 1 l. Reticulation spinose; short horizontal median ridge present............................................... 12 --Reticulation lacks spines; median ridge absent <i>tumida</i> 12. Lateral spines weakly developed; microreticulation present on anteroventralsurface <i>E.</i> <i>indianensis</i> --Strongly spinose; ventral microreticulation absent.................................................. <i>E.</i> <i>calabra</i> 13. 14. Large bulbous posteroventral swelling; lacks a median ridge................... <i>Eucytherura</i> sp. 2 15......Fossal spincs abscnt................................................................. Eucytherura sp. aff. <i>antipodum</i>
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 205-206, DOI: 10.3853/j.0067-1975.47.1995.237, http://zenodo.org/record/4660625
description: {"references": ["Muller, G. w., 1894. Die Ostracoden des Golfes von Neapel und der Angrenzenden Meeres-Abschnitte. Fauna und Flora des Golfes von Neapel und der Angrenzenden Meeres-Abschnitte, Herausgegeben von der Zoologischen Station zu Neapel 21: I-VIII, 1 - 404.", "Brady, G. S., 1867. Report on the Ostracoda dredged amongst the Hebrides. Reports of the British Association fro the Advancement of Science 36: 208 - 211.", "Bonaduce, G., G. Ciampo &amp; M. Masoli, 1975. Distribution of Ostracoda in the Adriatic Sea. Pubblicazioni della Stazione Zoologica di Napoli 40: 1 - 154.", "Colalongo, M. L. &amp; G. Pasini, 1980. Plio-Pleistocene Ostracoda of the Vrica Section in Calabria, with remarks on the Neogene / Quaternary Boundary. Bollettino della Societa Paleontologica Italiana 19: 44 - 126.", "Dingle, R., 1984. Mid-Cretaceous Ostracoda from Southern Africa and the Falkland Plateau. Annals of the South African Museum 93 (3): 97 - 211.", "Weingeist, L. 1949. The ostracode genus Eucytherura and its species from the Cretaceous and Tertiary of the Gulf Coast. Journal of Palaeontology 23: 364 - 379."]}