miked's picture

_MG_6608 fossil shells

Observed: 10th February 2012 By: miked
iSpot team
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_MG_6608
Description:

Can't remember where we got to with geology and ispot or indeed what constitutes a fossil. These shells are about 1-2cm across and in a shell sand dune that has been buried for about 100000 years (according to book), on top of dune is thick layer of larva.

Identifications
Species interactions

No interactions present.

Comments

martinjohnbishop's picture

J. Conch 40, 31 Hemicycla

A starting point might be to look at

Rediscovery and redescription of an almost unknown Hemicycla species (Gastropoda, Pulmonata, Helicidae): H. eurythyra O. Boettger 1908 from Tenerife, Canary Islands
YURENA YANES, JAVIER MARTÍN, MIGUEL ARTILES, LEOPOLDO MORO, MARÍA R. ALONSO and MIGUEL IBÁÑEZ,
(2009)
Abstract

Hemicycla eurythyra O. Boettger 1908, endemic to Tenerife, was rediscovered near its type locality. It is redescribed and compared with two conchologically similar taxa: H. pouchet (A. Férussac 1821) and H. pouchadan Ibáñez & Alonso 2007. H. eurythyra is grouped in the subgenus Hemicycla s. str. by the presence of a diverticulum in the bursa copulatrix complex.
Keywords
Gastropoda, Hemicycla eurythyra, Tenerife, Canary Islands.

miked's picture

Thanks, these shells are

Thanks, these shells are likely 100,000 years old although i suppose they may not have changed over this period as its still short in geological terms and quite possibly in snail species terms.
There are large numbers of fossils in this area although it may be dangerous (given the overhanging cliff) and against local nature conservation policy to get them out.

martinjohnbishop's picture

The report relates to a fossil

Boettger (1908) made a brief conchological description
of a Quaternary fossil taxon from the
Tejina Ravine, Tenerife Island, Canary Archipelago
(Fig. 1), with the name Hemicycla puchet var.
eurythyra,