Journal
MOLECULAR PHYLOGENETICS AND EVOLUTION
Volume 46, Issue 1, Pages 215-223Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.ympev.2007.08.002
Keywords
Conus textile; coxI-coxII intergenic sequence; evolution; superfamily Conoidea; Conasprella
Funding
- NATIONAL CANCER INSTITUTE [P30CA042014] Funding Source: NIH RePORTER
- NATIONAL INSTITUTE OF GENERAL MEDICAL SCIENCES [P01GM048677] Funding Source: NIH RePORTER
- NCI NIH HHS [P30 CA042014, CA42014] Funding Source: Medline
- NIGMS NIH HHS [GM48677, P01 GM048677, P01 GM048677-16] Funding Source: Medline
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The cone snails belong to the superfamily Conoidea, comprising similar to 10,000 venomous marine gastropods. We determined the complete mitochondrial DNA sequence of Conus textile. The gene order is identical in Conus textile, Lophiotoma cerithformis (another Conoidean gastropod), and the neogastropod Ilyanassa obsoleta, (not in the superfamily Conoidea). However, the intergenic interval between the coxI and coxII genes was much longer in C. textile (165 bp) than in any other previously analyzed gastropod. We used the intergenic region to evaluate evolutionary patterns. In most neogastropods and three conidean families the intergenic interval is small (<30 nucleotides). Within Conus, the variation is from 130 to 170 bp, and each different clade within Conus has a narrower size distribution. In Conasprella, a subgenus traditionally assigned to Conus, the intergenic regions vary between 200 and 500 bp, Suggesting that the species in Conasprella are not congeneric with Conus. The intergenic region was used for phylogenetic analysis of a group of fish-hunting Conus, despite the short length resolution was better than using standard markers. Thus, the coxI-coxII intergenic region can be used both to define evolutionary relationships between species in a clade, and to understand broad evolutionary patterns across the large superfamily Conoidea. (C) 2007 Elsevier Inc. All rights reserved.
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