Subonoba morioria
| Subonoba morioria | |
|---|---|
| Holotype from the Auckland War Memorial Museum | |
| Scientific classification | |
| Kingdom: | Animalia |
| Phylum: | Mollusca |
| Class: | Gastropoda |
| Subclass: | Caenogastropoda |
| Order: | Littorinimorpha |
| Superfamily: | Rissooidea |
| Family: | Rissoidae |
| Genus: | Subonoba |
| Species: | S. morioria
|
| Binomial name | |
| Subonoba morioria A. W. B. Powell, 1933
| |
| Synonyms[1][2] | |
| |
Subonoba morioria is a species of sea snail, a marine gastropod mollusc in the family Rissoidae.[1] It is endemic to the waters surrounding the Chatham Islands of New Zealand.
Description
In the original description, Powell described the species as follows:
Shell small, ovate, thin, fragile, white and translucent. Whorls 41⁄2, including a bluntly rounded protoconch of 11⁄2 smooth whorls. Spire tall, about l1⁄4 times height of aperture. The sculpture consists of numerous fine and closely spaced spiral lirae, 9 on the penultimate whorl, and 14 on the body-whorl and base. The interspaces are mostly about half the width of the lirae, but those near to the upper suture are wider and equal to the width of the lirae. Aperture ovate, peristome continuous. Outer-lip with a shallow sinus above and inclined forwards slightly below.[3]
The shells of the species measure 1.9 mm (0.075 in) in height and 1.0 mm (0.039 in) in diameter.[4] It differs from S. foveauxiana in shape, and from S. fumata by having stronger spirals, a shorter spire, and a more inflated body-whorl (nine on the penultimate and 14 across the body-whorl and base).[3][5]
Taxonomy
The species was first described by A. W. B. Powell in 1933.[3] In 1995, Hamish Spencer and Richard C. Willan recombined the species as Onoba morioria.[6][7] While this remains the preferred name by the New Zealand Organisms Register, the original combination, S. morioria, is the preferred name by the World Register of Marine Species and The Marine Biota of Aotearoa New Zealand (2023).[1][8]
The holotype was collected by Powell himself in February 1933, from shell sand at Waitangi in the Chatham Islands. The holotype is held by the Auckland War Memorial Museum.[9][10]
Distribution and habitat
S. morioria is endemic to New Zealand,[8] found only in the waters of the Chatham Islands.[11][12]
References
- ^ a b c Subonoba morioria A. W. B. Powell, 1933. Retrieved through: World Register of Marine Species on 23 February 2026.
- ^ Spencer, H. G.; Marshall, B. A.; Willan, R. C. (June 2009). "Checklist of New Zealand living Mollusca". New Zealand Inventory of Biodiversity. Volume 1. Kingdom Animalia Radiata, Lopotrochozoa, Deuteromstomia. 1: 196–219. Wikidata Q125720861.
- ^ a b c Powell, A. W. B. (1933). "The Marine Mollusca of the Chatham Islands". Records of the Auckland Institute and Museum. 1: 181–208. ISSN 0067-0464. JSTOR 42905950. Wikidata Q58676558. This article incorporates text from this source, which is under a CC BY 4.0 license.
- ^ "Subonoba morioria Powell, 1933". New Zealand Mollusca. Retrieved 23 February 2026.
- ^ Powell, A.W.B. (1979). New Zealand Mollusca: Marine, Land and Freshwater Shells. Auckland: Collins. p. 112. ISBN 0002169061.
- ^ Spencer, H. G.; Willan, R. C. (1995). "The marine fauna of New Zealand: Index to the fauna. 3. Mollusca" (PDF). New Zealand Oceanographic Institute Memoir. 105: 1–125. ISSN 0083-7903. Wikidata Q66411987.
- ^ Morley, Margaret S. (April 1997). "New Zealand Mollusc Name Changes from Powell (1979) to Spencer & Willan (1996)". Poirieria. 20: 13–22.
- ^ a b Walton, K.; Marshall, B. A.; Spencer, H. G. (2023). "Chapter 14: Kingdom Animalia, phylum Mollusca (clams, slugs, snails, cephalopods, & kin)". In Kelly, M.; Mills, S.; Terezow, M.; Sim-Smith, C.; Nelson, W. (eds.). The Marine Biota of Aotearoa New Zealand. Updating our marine biodiversity inventory. NIWA Biodiversity Memoir. Vol. 136. p. 226.
- ^ Blom, Wilma M. (2025). "Annotated Catalogue of Fossil and Extant Molluscan Types in the Auckland War Memorial Museum". Bulletin of the Auckland Museum. 22. doi:10.32912/BULLETIN/22. ISSN 1176-3213. OCLC 1550165130. Wikidata Q135397912.
- ^ "Subonoba morioria". Collections Online. Auckland War Memorial Museum. Retrieved 23 February 2026.
- ^ Dell, R. K.; Edmonds, S. J. (1961). "Biological results of the Chatham Islands 1954 Expedition. Part 4. Marine Mollusca; Sipunculoidea" (PDF). New Zealand Oceanographic Institute Memoir. 7: 1–27. ISSN 0083-7903. Wikidata Q66412133.
- ^ "Subonoba morioria Powell, 1933 (Species)". Collections Online. Te Papa. Retrieved 23 February 2026.