A revision of the genus Ancilla Lamarck, 1799 (Mollusca : Olividae : Ancillinae)
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Date
1982
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Abstract
The genus Ancilla Lamarck, 1799, contains 34 valid species and
subspecies; 41 names previously applied to the group are reduced to
23, and 11 new species described (Kilburn, 1977, 1980, 1981). A
provisional subgeneric classification is proposed. Subgenus
Hesperancilla Kilburn, 1981, is established for the Brazilian A.
matthewsi Burch & Burch, 1967, and Javancilla Kilburn, 1981, for the
Eocene A. boettgeri Martin, 1914. Inadequate data on its type species
prevents definition of subgenus. Ancilla s.s. at this stage, but Recent
Indo-Pacific taxa are provisionally divided into (a) subgenus
Sparellina P. Fischer, 1883, with an autapomorphic pectinate rachidian
and (b) subgenera sparella Gray, 1857, and Chilotygma H. &. A. , Adams,
1853, with synplesiomorphic tricuspidate rachidians. The phylogeny
and biogeography of the genus are discussed.
The subfamily Ancillinae is reclassified, and a tentative
cladogram proposed.
Description
Thesis (Ph.D.)-University of Natal, Pietermaritzburg, 1981.
Keywords
Gastropoda., Mollusks., Olividae., Theses--Zoology.