Australian Museum Journal Morphological and ecological disparity in naraoiids (Arthropoda) from the Early Cambrian Chengjiang Fauna, China

Shortform:
Chen et al., 1997, Rec. Aust. Mus. 49(1): 1–24
Author(s):
Chen, Jun-Yuan; Edgecombe, Gregory D.; Ramsköld, Lars
Year published:
1997
Title:
Morphological and ecological disparity in naraoiids (Arthropoda) from the Early Cambrian Chengjiang Fauna, China
Serial title:
Records of the Australian Museum
Volume:
49
Issue:
1
Start page:
1
End page:
24
DOI:
10.3853/j.0067-1975.49.1997.249
Language:
English
Date published:
04 July 1997
Cover date:
04 July 1997
ISSN:
0067-1975
CODEN:
RAUMAJ
Publisher:
The Australian Museum
Place published:
Sydney, Australia
Subjects:
CAMBRIAN, EARLY; TRILOBITA; PALAEONTOLOGY
Digitized:
17 February 2009
Available online:
04 March 2009
Reference number:
249
EndNote package:
EndNote file
Title page:
Title page (96kb PDF)
Complete work:
Complete work (10901kb PDF)

Abstract

Misszhouia longicaudata (Zhang and Hou) from the Chengjiang lagerstätte is separated from Naraoia Walcott by its antennular orientation, its smaller cephalic caeca and gut, lanceolate distal exopod lobe, and partial fusion of the exopod and first endopodal podomere. Naraoia spinosa Zhang and Hou (also from Chengjiang) shares derived characters with the type species, N. compacta. Deposit feeding is suggested for Naraoia spinosa by both morphology and preservational circumstances. New material shows previously unknown features in Misszhouia longicaudata, including frontal organs anterior to a sclerotised lobe of the hypostomal complex, the position of the mouth opening, details of antennule and biramous limb attachments, morphology of the sternites and limb rami, and the structure of the ventral cuticle in the cephalon and pleural areas.

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