Australian Museum Journal An unusual micromorphic brachiopod from the Middle Cambrian of north-eastern New South Wales, Australia

Shortform:
Brock, 1999, Rec. Aust. Mus. 51(3): 179–186
Author(s):
Brock, Glenn A.
Year published:
1999
Title:
An unusual micromorphic brachiopod from the Middle Cambrian of north-eastern New South Wales, Australia
Serial title:
Records of the Australian Museum
Volume:
51
Issue:
3
Start page:
179
End page:
186
DOI:
10.3853/j.0067-1975.51.1999.1305
Language:
English
Date published:
20 October 1999
Cover date:
20 October 1999
ISSN:
0067-1975
CODEN:
RAUMAJ
Publisher:
The Australian Museum
Place published:
Sydney, Australia
Subjects:
CAMBRIAN: MIDDLE; BRACHIOPODA
Digitized:
20 October 1999
Available online:
20 October 1999
Reference number:
1305
EndNote package:
EndNote file
Title page:
Title page (8kb PDF)
Complete work:
Complete work (363kb PDF)

Abstract

Anomalocalyx cawoodi new genus and new species, from Middle Cambrian (Floran-Undillan) allochthonous limestone clasts of the Murrawong Creek Formation, north eastern New South Wales, is characterised by a deep, tapering, conical ventral valve with a pair of simple teeth, an arched pseudodeltidium, well defined radial costae, crossed at more or less regular intervals by continuous concentric growth lamellae, and a presumed calcium carbonate shell composition, all suggesting an affinity with the Brachiopoda. Anomalocalyx cawoodi also possesses a number of unusual morphological features including an elongate, tapering interior tube extending along the inner posterior margin of the ventral valve, under the pseudodeltidium, that may be interpreted as a spondylium. Though possible cnidarian and molluscan affinities are fully explored, the weight of available evidence suggests the affinities of A. cawoodi are with the Brachiopoda.