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.