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.