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Omphalotropis variabilis

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General Information

GLOBAL DISTRIBUTION: NATIVE ? - Cooks - ?

COOK ISLANDS STATUS: Native; Land, coastal to Cloud Zone, forests; on tree trunks and under debris

KEY FEATURES: Very small, ~5mmL and nearly as wide. Pyramid-like, rapidly tapering spire, apex sharp. Dull grey-brown. Animal mainly hidden; tentacles 2, short, eye at base.

Enlarged Image of 'Omphalotropis variabilis'

Cook Islands Distribution

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Southern Group: Present Makatea:
RR	MG	AT	MK	MT	AK	PL	TK	MN
+++

Northern Group:
TN	MH	RK	PK	NS	SW

Key to Symbols

blank	no data
-	absent	L	localised
X	extinct 'naturally'	W	widespread
XQi	quarantine intercepted	R	recent
XQe	eradicated	?	query preceding category
P	present	T?	taxonomic query
S	seasonal	nn	present, said to have no name
O	occasional	?1	present, name not investigated
++++	very common	?2	presence not verified, no name recorded
+++	common	N/A	absent, name not expected
++	uncommon
+	rare
Cook Islands islands: RR =Rarotonga, MG = Mangaia, AT =‘Ātiu, MK=Ma‘uke, MT=Miti‘āro, AK=Aitutaki, PL=Palmerston, PN=Penrhyn, MN=Manuae, TK=Takūtea, TN=Tongareva (TS=Tongaleva Spoken, TW=Tongareva Written, they say "el" but write "r"), MH=Manihiki, RK=Rakahanga, PK=Pukapuka, NS=Nassau, SW=Suwarrow. After a Polynesian name: ^=orthography query. Countries and other: FIJ=Fiji, WT=Wallis & Futuna, SAM=Samoa, TON=Tonga, NIU=Niue, CK=Cook Islands, CKM=Cook Islands Māori, FP=French Polynesia, AUS=Australs, SOC=Societies, TAH=Tahiti, TUA=Tuamotus, MQS=Marquesas, MNG=Mangareva, PIT=Pitcain group, EAS=Easter Island, HAW=Hawai‘i, NZ=New Zealand, NZM=New Zealand Māori

Scientific Taxonomy

Omphalotropis variabilis
TAXONOMY: ANIMALIA; MOLLUSCA; GASTROPODA; PROSOBRANCHIA; Mesogastropoda; Rissoacea; ASSIMINEIDAE

More Information

IDENTIFICATION: Very small, to 5mmL x 4mmØ. Pyramid-like, dull grey-brown. SPIRE moderate, tapering rapidly, apex sharp; SUTURE narrow, w lip on lower edge. MAIN WHORL with low central spiral ridge, and low inner spiral ridge from umbilicus rim. MOUTH lip not curled, without any teeth, without inner ridges. ridges. LIVE ANIMAL mainly hidden, short sensory tentacles with eye at each base.

Vouchers & References

Vouchers:
Rarotonga: report 1881 Garrett, with ID as Omphalotropis variabilis; specimens, 2005/10, abundant in inland forests but extirpated on coastal plain, Fred Brook rpt 2005/11 ID as Omphalotropis variabilis. Mangaia report 1881 Garrett, with ID as Omphalotropis variabilis. Atiu report 1881 Garrett, with ID as Omphalotropis variabilis. Aitutaki report 1881 Garrett, with ID as Omphalotropis variabilis.

References:
None recorded.

Data Update History (information):
zTX, zB02, zM04b, zD02

Web Resources

Citation Information

McCormack, Gerald (2007) Cook Islands Biodiversity Database, Version 2007.2. Cook Islands Natural Heritage Trust, Rarotonga. Online at http://cookislands.bishopmuseum.org.
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