Australian Museum Journal The Namanereidinae (Polychaeta: Nereididae). Part 2. Cladistic biogeography

Shortform:
Glasby, 1999, Rec. Aust. Mus., Suppl. 25: 131–144
Author(s):
Glasby, Christopher J.
Year published:
1999
Title:
The Namanereidinae (Polychaeta: Nereididae). Part 2. Cladistic biogeography
Serial title:
Records of the Australian Museum, Supplement
Volume:
25
Start page:
131
End page:
144
DOI:
10.3853/j.0812-7387.25.1999.1355
Language:
English
Date published:
12 May 1999
Cover date:
12 May 1999
ISBN:
ISBN 0-7313-8856-9
ISSN:
0812-7387
CODEN:
RAMSEZ
Publisher:
The Australian Museum
Place published:
Sydney, Australia
Subjects:
POLYCHAETA; TAXONOMY; BIOGEOGRAPHY
Digitized:
12 May 1999
Available online:
14 January 2009
Reference number:
1355
EndNote package:
EndNote file
Title page:
Title page (17kb PDF)
Complete work:
Complete work (417kb PDF)

Abstract

A cladistic biogeographic study of the Namanereidinae was under taken to test whether the biogeographic patterns shown by the species can be explained by vicariance, and whether they support the conventional view of Pangaean break-up and a hypothetical Tethys Sea. The Namanereidinae consists of two monophyletic clades, Namalycastis and Namanereis, members of which exhibit similar distribution patterns. If species of Namalycastis and Namanereis share a common history of fragmentation and diversification then their area cladograms should be congruent and congruent with the postulated sequence of geological fragmentation. Congruence between area cladograms and between taxon and area cladograms was assessed using the COMPONENT program (Page, 1993). Results indicate that the biogeographic patterns shown by species of both genera may be explained largely by vicariance. Rather than supporting the conventional view of Pangaean break-up and a hypothetical Tethys Sea, the results are better explained by the expanding earth model (sensu Shields, 1976, 1979) which predicts that during the Jurassic Period the earth was substantially smaller, the Tethys Sea was much reduced (or absent) and the Pacific was essentially closed. The minimum age of the subfamily is thought to be about 200 My.

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