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Title
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A systematic revision of the electric ray genus Narcine Henle, 1834 (Chondrichthyes: Torpediniformes: Narcinidae), and the higher-level phylogenetic relationships of the orders of elasmobranch fishes (Chondrichthyes).
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Identifier
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AAI9946149
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identifier
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9946149
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Creator
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Carvalho, Marcelo Rodrigues de.
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Contributor
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Adviser: John G. Maisey
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Date
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1999
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Language
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English
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Publisher
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City University of New York.
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Subject
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Biology, Zoology
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Abstract
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The electric my genus Narcine Henle, 1834 is taxonomically reviewed and found to contain 20 species (11 previously described and nine new species). Twenty-six nominal species can be applied to Narcine (15 are placed in synonymy). Valid species are: Narcine brasiliensis (von Olfers, 1831; the type-species) and N. bancroftii Griffith, 1834 (western Atlantic); Narcine entemedor Jordan and Starks, 1895, Narcine vermiculatus Breder, 1928 and Narcine sp. nov. F (eastern Pacific); N. timlei (Bloch and Schneider, 1801), N. maculata (Shaw, 1804), N. lingula Richardson, 1846, N. brevilabiata . Bessednov, 1966, N. sp. nov. G, N. sp. nov. H and N. sp. nov. I (northern Indian and western Pacific oceans); N. rierai (Lloris and Rucabado, 1991), N. sp. nov. D and N. sp. nov. E (western Indian Ocean); N. tasmaniensis, N. westraliensis, N. sp. nov. A, N. sp. nov. B and N. sp. nov. C (Australia). Species placed in synonymy are (valid species in parenthesis): Narcine schmitti Hildebrand, 1948 (N. vermiculatus); Narcine brachypleura Miranda Ribeiro, 1923 and Torpedo ocellata Quoy and Gaimard, 1824 (N. brasiliensis); Torpedo pictus Gray, 1854, Narcine corallina Garman, 1881, Narcine punctata Garman, 1881 and Narcine umbrosa Jordan, 1884 (N. bancroftii); Narcine indica Henle, 1834, Narcine macrura Valenciennes, 1852, Narcine microphthalma Valenciennes, 1852 and Narcine brunnea Annandale, 1909 (N. timlei); Raja bicolor Shaw, 1804, Narcine maculata Dumeril, 1852, Narcine firma Garman, 1913 and Narcine prodorsalis Bessednov, 1966 (N. maculata Shaw, 1804). Lectotypes are designated for T. ocellata. T. brasiliensis, N. corallina, N. umbrosa, R. timlei and N. brunnea. A neotype is chosen for N. brevilabiata. Fossil narcinids from the Eocene Monte Bolca formation (Italy) are reviewed. Characters supporting the monophyly of Narcine are presented.;Recent higher-level elasmobranch taxa are subjected to a cladistic analysis to clarify the interrelationships of Compagno's superorders, and test the monophyly of the Squalea, Squaliformes and Hexanchiformes. A matrix containing 20 terminal taxa and 67 morphological characters was analyzed using computer-based parsimony procedures. The resulting single most parsimonious tree (L = 132 steps, Ci = 0.67, Ri = 0.80) divides Recent elasmobranchs into two higher divisions, the Galeomorphii and Squalea, with 10 included monophyletic orders.
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Type
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dissertation
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Source
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PQT Legacy CUNY.xlsx
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degree
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Ph.D.
