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Please use this identifier to cite or link to this item: http://ntour.ntou.edu.tw:8080/ir/handle/987654321/29380

Title: MORPHOLOGY BASED CLADISTIC ANALYSIS OF METANEPHROPS: THE MOST DIVERSE EXTANT GENUS OF CLAWED LOBSTER (NEPHROPIDAE)
Authors: Dale Tshudy;Tin-Yam Chan;Ulf Sorhannus
Contributors: NTOU:Institute of Marine Biology
國立臺灣海洋大學:海洋生物研究所
Date: 2007-08
Issue Date: 2011-10-21T03:05:34Z
Publisher: Journal of Crustacean Biology
Abstract: Abstract:We performed the first cladistic analysis of Metanephrops, the most diverse extant genus of clawed lobster, using a morphology-based data matrix of all 20 species of Metanephrops and 35 cladistically informative characters, all external hard parts. Unweighted cladistic analysis corroborates previous studies that indicated that homoplasy is rampant in the evolution of clawed lobsters. Only 5 of the 68 synapomorphies identified by the analysis are unambiguous, unreversed synapomorphies. Recent species of Metanephrops have traditionally been divided (non-cladistically) into four morphology-based groups. Cladistic analyses support the traditional, arafurensis, Atlantic/binghami, and japonicus groupings; these groups are monophyletic. The thomsoni group is not supported by the cladogram. The (two) oldest known fossil Metanephrops species occur in Late Cretaceous, shallow marine rocks of the eastern/Atlantic side of the Antarctic Peninsula. The stratigraphic and geographic occurrences of these fossil species are the basis for the previously hypothesized, Late Cretaceous, southern high latitude origin of Metanephrops. Cladistic results corroborate that Metanephrops originated in the southern high latitudes. The cladistically most plesiomorphic single species, the recent M. challengeri, and the next most plesiomorphic species, the Late Cretaceous M. rossensis, are both known from the high southern latitudes. Likewise, the most plesiomorphic species group, the binghami group, is best known from the high southern latitudes.
Relation: 27(3), pp.463-476
URI: http://ntour.ntou.edu.tw/handle/987654321/29380
Appears in Collections:[海洋生物研究所] 期刊論文

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