New Zealand Journal of Geology and Geophysics abstracts

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Brachiopod fauna of the Kokoamu Greensand (Oligocene), New Zealand

DAVID I. MacKINNON

Department of Geology
University of Canterbury
Christchurch, New Zealand

STANLEY S. BEUS

Department of Geology
Northern Arizona University
P.O. Box 6030
Flagstaff, Arizona 86011, U.S.A.

DAPHNE E. LEE

Department of Geology
University of Otago
P.O. Box 56
Dunedin, New Zealand

Abstract Fourteen species of articulate brachiopods (the so-called Liothyrella landonensis fauna of Thomson 1926) are recorded from the late Oligocene (Duntroonian) Kokoamu Greensand, an extensive and generally thin blanket of highly glauconitic, fine to medium-grained sandstone covering some 3000 km2 of the North Otago - South Canterbury region of the eastern South Island, New Zealand. Two new genera, Landonella and Praemagadina, and three new species, Landonella laqueiforrnis, Praemagadina campbelli, and Magadina squiresi, are described. Liothyrella landonensis Thomson, 1918 is reassigned to the genus Acrobrochus Cooper, 1983.
The diagnostic criteria and taxonomic composition of the Family Terebratellidae King, 1850 as defined by Elliott & Hatai (1965) are re-evaluated. The diagnostic criteria of the Subfamily Anakineticinae Richardson, 1991 are critically appraised; a revised diagnosis for the Subfamily Anakineticinae is introduced. The Subfamily Terebratellinae King, 1850 is retained; the Subfamily Neothyridinae Allan, 1940 is abandoned as taxonomically unsound. The new Subfamily Stethothyridinae is introduced.
The distribution and relative abundance of the more commonly occurring brachiopods in the Kokoamu Greensand at five localities are quantified.

Keywords Brachiopoda; Rhynchonellida; Basiolidae; Aetheinae; Hemithyrididae; Terebratulida; Terebratuloidea; Terebratulidae; Terebratulinae; Squires Greensand; Cancellothyroidea; Cancellothyrididae; Cancellothyridinae; Dallinoidea; Dallinidae; Terebratelloidea; Terebratellidae; Magadinae; Anakineticinae; Bouchardiinae; Stethothyridinae; Terebratellinae; Kokoamu Greensand; Duntroonian; late Oligocene; Cenozoic; New Zealand; paleoecology; taxonomy

Received 21 October 1992; published 14 September 1993
New Zealand Journal of Geology & Geophysics, 1991, Vol. 36: 327—347
0028Ð8306/06/3603—0327 ©The Royal Society of New Zealand 1991

PDF file of entire paper: medium quality (3721K); (scanned from paper original: notes about this process). Digitisation of this article from the printed journal was kindly facilitated by the Geological Society of New Zealand

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