Horseshoe crab phylogeny based on amino acid sequences of the fibrino-peptide-like peptide C
✍ Scribed by Shishikura, Fumio ;Nakamura, Shin ;Takahashi, Kenji ;Sekiguchi, Koichi
- Publisher
- John Wiley and Sons
- Year
- 1982
- Tongue
- English
- Weight
- 240 KB
- Volume
- 223
- Category
- Article
- ISSN
- 0022-104X
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✦ Synopsis
Abstract
Phylogenetic relationships of recent horseshoe crabs including two subfamilies, i.e., Limulinae (Limulus polyphemus), and Tachypleinae (Tachypleus tridentatus, Tachypleus gigas, and Carcinoscorpius rotundicauda), were investigated by amino acid sequence analysis of the 28 amino acid peptide C released from each coagulogen during gel formation. Our results support the phylogenetic separation of the two subfamilies, whereas the relations among Tachypleinae do not match the accepted generic classification. Thus, T. tridentatus appears to be more closely related to C. rotundicauda than it is to T. gigas. Divergence times among Tachypleinae are estimated to be 106 million years ago between T. gigas and two other species'and 53 million years ago between T. tridentatus and C. rotundicauda.