Australian Museum Journal The Sinolepidae, a family of antiarchs (placoderm fishes) from the Devonian of South China and eastern Australia

Shortform:
Ritchie et al., 1992, Rec. Aust. Mus. 44(3): 319–370
Author(s):
Ritchie, A.; Wang, S.; Young, Gavin C.; Zhang, G.
Year published:
1992
Title:
The Sinolepidae, a family of antiarchs (placoderm fishes) from the Devonian of South China and eastern Australia
Serial title:
Records of the Australian Museum
Volume:
44
Issue:
3
Start page:
319
End page:
370
DOI:
10.3853/j.0067-1975.44.1992.38
Language:
English
Date published:
05 December 1992
Cover date:
05 December 1992
ISSN:
0067-1975
CODEN:
RAUMAJ
Publisher:
The Australian Museum
Place published:
Sydney, Australia
Subjects:
FISHES; PALAEONTOLOGY
Digitized:
25 February 2009
Available online:
09 March 2009
Reference number:
38
EndNote package:
EndNote file
Title page:
Title page (230kb PDF)
Complete work:
Complete work (16463kb PDF)

Abstract

Two new antiarchs are described, from the Late Devonian Hunter Siltstone near Grenfell in south-eastern Australia (Grenfellaspis branagani n.gen., n.sp.), and from the Early-Middle Devonian Dayaoshan Group in Guangxi, south-eastern China (Dayaoshania youngi n.gen., n.sp.). New material is described of Xichonolepis qujingensis Pan & Wang, 1978 from the Middle Devonian of Yunnan, and new interpretations are presented for Sinolepis Liu & Pan, 1958 from the Late Devonian of Jiangsu. All four genera are placed in the family Sinolepidae Liu & Pan, of which the most obvious defining character is the much reduced ventral laminae of the anterior and posterior ventrolateral plates of the trunk armour, and the presumed absence of a median ventral plate. Emended diagnoses are presented for the family Sinolepidae and the genera Xichonolepis and Sinolepis. It is suggested that Grenfellaspis and Sinolepis are immediately related, and the biostratigraphic, biogeographic, and palaeogeographic implications of this relationship are discussed. The vertebrate fauna from the Hunter Siltstone is regarded as the youngest nonmarine vertebrate horizon known from the Devonian of south-eastern Australia. A close palaeogeographic connection between south-eastern Australia and South and North China is indicated for the latest Devonian and earliest Carboniferous (late Famennian-early Tournaisian), which contrasts with the distinctive Devonian vertebrate faunas from the two regions in earlier strata. Other Devonian fossil groups showing a similar biogeographic pattern are considered in the context of competing hypotheses concerning the palaeogeographic relationships of Gondwana and Asia during the Middle Palaeozoic.