Haurakia Iredale, 1915
publication ID |
https://doi.org/ 10.5252/zoosystema2023v45a25 |
publication LSID |
lsid:zoobank.org:pub:054D312B-C54B-459D-8A47-AC9CB681D7D4 |
DOI |
https://doi.org/10.5281/zenodo.10427269 |
persistent identifier |
https://treatment.plazi.org/id/03E387F1-0B49-752D-FE90-4BB3EEF6F904 |
treatment provided by |
Plazi |
scientific name |
Haurakia Iredale, 1915 |
status |
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Genus Haurakia Iredale, 1915 View in CoL
Haurakia Iredale, 1915: 449 View in CoL .
Haurakiopsis Powell, 1937: 192 View in CoL .
Vitricithna Laseron, 1956: 452 View in CoL .
TYPE SPECIES. — Rissoia hamiltoni Suter, 1898: 2 , 3, 5; fig. IV (by original designation) accepted as Haurakia hamiltoni ( Suter, 1898) . Haurakiopsis : Haurakiopsis pellucida Powell, 1937 (by original designation) accepted as Haurakia pellucida ( Powell, 1937) . Vitricithna : Cithna marmorata Hedley, 1907 (by original designation) accepted as Haurakia marmorata ( Hedley, 1907) .
DIAGNOSIS. — Shell ovate-conical, with weak or moderately strong axial or smooth ribs; in some species the ribs are interrupted at the periphery due to the presence of a spiral cordlets. Anterior edge of the aperture with shallow, wide excavation, posterior sinus wide, distinct. Protoconch apparently smooth or with one or more spiral threads or rows of minute granules; about 1.5 whorls with large nucleus (when paucispiral) or small nucleus and about 2.5 whorls (when multispiral). Colouration of teleoconch variable with several patterns. Head-foot: long ciliated cephalic tentacles; foot constricted in middle, with posterior mucous gland; anterior and posterior pallial tentacles; a single, slender metapodial tentacle (see Ponder 1985: 29; Kay 1979). Operculum simple, thin, nucleus eccentric, last whorl large ( Ponder 1985: 131, fig. 82C).
REMARKS
Previously considered as a subgenus of Pusillina Monterosato, 1884 ( Ponder 1985: 29), it is now ranked as a full genus ( Criscione et al. 2016). Rissoia hamiltoni (type species of Haurakia ) and Cithna marmorata (type species of Vitricithna ) share some general teleoconch, head-foot, radular and anatomical features (including male and female genital ones), and their closer affinity with respect to a distinct clade of Pusillina species is supported by molecular data ( Criscione et al. 2016). However, Criscione et al. (2016: 14) also treated Haurakia and Vitricithna as distinct genera, scoring a large genetic divergence between the two type species (larger than that scored between widely recognised genera); the issue should be assessed by a denser sampling in a molecular phylogenetic framework. We keep here Cithna marmorata in the genus Haurakia following current treatment [ Ponder 1985: 29-30, fig. 82A-E; Hasegawa 2000: 149, pl. 74, fig. Rissoidae-1; both as Pusillina (Haurakia) ]. Haurakia , as currently conceived, includes c. 35 species, of which seven fossil, and dates back to the Miocene-Pleistocene of New Zealand and the Oligocene-Miocene of Tasmania ( Ponder 1985: 30).
No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.
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Haurakia Iredale, 1915
Amati, Bruno, Giulio, Andrea Di & Oliverio, Marco 2023 |
Vitricithna
LASERON C. F. 1956: 452 |
Haurakiopsis
POWELL A. W. B. 1937: 192 |
Haurakia
IREDALE T. 1915: 449 |