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Please use this identifier to cite or link to this item: http://hdl.handle.net/1942/3438

Title: A reappraisal of the systematics of the Monocelididae (Platyhelminthes, Proseriata): Inferences from rDNA sequences
Authors: Litvaitis, MK
Curini-Galletti, MC
Martens, Paul M.
Kocher, TD
Issue Date: 1996
Publisher: ACADEMIC PRESS INC JNL-COMP SUBSCRIPTIONS
Citation: MOLECULAR PHYLOGENETICS AND EVOLUTION, 6(1). p. 150-156
Abstract: The current classification system for the Monocelididae which is based on the character ''presence or absence of an accessory prostatoid organ'' divides the family into two subfamilies, namely the Minoninae and the Monocelidinae. However, other characters relating to the structure of the male copulatory bulb and to karyotypes do not support this division. Monocelidid male copulatory bulbs can be either of the simplex or the duplex-type, and if this character is mapped onto the current classification, then both subfamilies contain species with either type of copulatory bulb. We therefore decided to construct an independent phylogeny for the Monocelididae using nucleotide-sequence data of the gene coding for the 26/28S rDNA. Distance- and parsimony-based analyses resulted in phylogenetic trees that strongly supported a division of the Monocelididae based on characters of the male copulatory bulb and not on the accessory prostatoid organ. Thus, all species possessing a simplex-type copulatory bulb cluster together into one monophyletic group, the Monocelidinae (sensu Midelburg), whereas species characterized by a duplex-type copulatory bulb constitute a paraphyletic assemblage. (C) 1996 Academic Press, Inc.
Notes: UNIV NEW HAMPSHIRE,DEPT ZOOL,DURHAM,NH 03824. UNIV SASSARI,IST ZOOL,I-07100 SASSARI,ITALY. LIMBURGS UNIV CENTRUM,DEPT SBM,B-3590 DIEPENBEEK,BELGIUM.
URI: http://hdl.handle.net/1942/3438
DOI: 10.1006/mpev.1996.0067
ISI #: A1996UY28100015
ISSN: 1055-7903
Type: Journal Contribution
Appears in Collections: Research publications

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