Onoba elegans

Onoba elegans is a species of marine gastropod mollusc in the family Rissoidae.^[1] First described by Winston Ponder in 1965, it is endemic to the waters of New Zealand.

Onoba elegans
Holotype of Onoba elegans from Auckland War Memorial Museum
Scientific classification
Kingdom:	Animalia
Phylum:	Mollusca
Class:	Gastropoda
Subclass:	Caenogastropoda
Order:	Littorinimorpha
Family:	Rissoidae
Genus:	Onoba
Species:	O. elegans
Binomial name
Onoba elegans (Ponder, 1965)
Synonyms[1]
Onoba (Ovirissoa) elegans Ponder, 1965 Rissopsis (Peringiella) elegans Ponder, 1965

Description

Onoba elegans has an ovate shell, with a tall spire and five whorls.^[2] The species measures 3.1mm by 2.15mm.^[3] The animal is yellowish-white in colour, with short cephalic tentacles.^[2]

Distribution

The species is endemic to New Zealand.^[1] The holotype was collected by K. Hipkins on 29 December 1953, from a depth of 40 metres, 0.8 km west of Stephenson Island in the Whangaroa Harbour, Northland Region.^[4] Specimens have been found on the east coast of the Northland Region, and the north-west and north of the Aupouri Peninsula.^[5][6][7][8]