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Recent Extinct Land Snails (Euconulidae) from the Gambier Islands with Remarkable Apertural Barriers

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Title:Recent Extinct Land Snails (Euconulidae) from the Gambier Islands with Remarkable Apertural Barriers
Authors:Bouchet, Philippe
Abdou, Ahmed
Date Issued:Apr 2001
Publisher:University of Hawai'i Press
Citation:Bouchet P, Abdou A. 2001. Recent extinct Land Snails (Euconulidae) from the Gambier Islands with remarkable apertural barriers. Pac Sci 55(2): 121-127.
Abstract:Based on study of material collected in the Gambier Islands (eastern
Polynesia) by the 1934 Mangarevan Expedition and in 1997, two endemic species
of Euconulidae are shown to exhibit apertural barriers unlike those of any
other Pacific island limacoids, both in their ontogeny and development. The
barriers are fully developed only in juveniles and subadults and are resorbed in
full-grown individuals. Aukena, hitherto considered a subgenus of the Hawaiian-Polynesian
genus Hiona, is elevated to genus rank. Aukena endodonta, n. sp., with
six apertural barriers (one columellar, three parietal, two palatal), is described,
and A. tridentata (Baker, 1940) is redescribed. The natural environment of the
Gambier Islands had already been severely altered by 1934, and the two endemic
species of Aukena are considered extinct. One other endemic euconulid
without apertural barriers, Philonesia mangarevae Baker, 1940, survives in a small
patch of native forest at the base of Mount Mokoto.
Appears in Collections: Pacific Science Volume 55, Number 2, 2001

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