Australian Museum Journal New information on the head and shoulder girdle of Canowindra grossi Thomson, from the Late Devonian Mandagery Sandstone, New South Wales

Shortform:
Long, 1985, Rec. Aust. Mus. 37(2): 91–99
Author(s):
Long, John A.
Year published:
1985
Title:
New information on the head and shoulder girdle of Canowindra grossi Thomson, from the Late Devonian Mandagery Sandstone, New South Wales
Serial title:
Records of the Australian Museum
Volume:
37
Issue:
2
Start page:
91
End page:
99
DOI:
10.3853/j.0067-1975.37.1985.338
Language:
English
Date published:
01 August 1985
Cover date:
01 August 1985
ISSN:
0067-1975
CODEN:
RAUMAJ
Publisher:
The Australian Museum
Place published:
Sydney, Australia
Subjects:
DEVONIAN; FOSSIL
Digitized:
09 January 2009
Available online:
03 March 2009
Reference number:
338
EndNote package:
EndNote file
Title page:
Title page (153kb PDF)
Complete work:
Complete work (1618kb PDF)

Abstract

The head of Canowindra grossi is redescribed from newly prepared casts of the holotype. The cheek has a fractionated postorbital series consisting of one large and two small postorbital bones; the lachrymal is small relative to the postorbitals and jugal, and the jugal is elongate. The opercular is deep, and higher than long. The skull table features a parietal shield without differentiated intertemporal, supratemporal or parietal bones. Canowindra shares with osteolepids plus eusthenopterids (Osteolepiformes) a large, externally ornamented anocleithrum, and a cheek with bar-like, vertical preopercular and single, large squamosal bone. It differs from these groups in the structure of the postorbital series and skull roof table. Canowindra represents an endemic genus which should be regarded as the only member of a taxon equivalent to osteolepids plus eusthenopterids. An amended diagnosis of the genus is given.