886. TAXONOMY AND MORPHOLOGIC DIVERSITY OF MANDARINA (PULMONATA) IN THE BONIN ISLANDS

DOI Web Site 3 Citations

Bibliographic Information

Other Title
  • 886. 小笠原諸島における陸貝, Mandarina の分類と形態変異
  • 小笠原諸島における陸貝,Mandarinaの分類と形態変異〔英文〕
  • オガサワラ ショトウ ニ オケル リクカイ Mandarina ノ ブンルイ

Search this article

Abstract

Fifteen fossil and extant species including seven new species of the Pleistocene. Recent land snail genus Mandarina (Pulmonata ; Camaenidae) of the Bonin Islands are described, and their morphologic and possible interspecific relationships are considered. Mandarina has undergone remarkable adaptive radiation in this small, isolated archiperago. The diversified shell morphology of these snails is characterized by complex allometric trends generated by the interplay of juvenile shell form and later shell growth patterns. Morphologic features in the juvenile stage are little influenced by habitat conditions, and the classification of species based on juvenile shells matches well with that based on genitalia. In contrast, adult shell characters are strongly influenced by environmental conditions, suggesting that they are useful to consider habitats of fossil species. Phylogenetic relationships of these species were preliminarily reconstructed from quantitative analysis of juvenile shell and penial morphology. It is assumed that not only distinct diversification of shell morphology in the same stock but also convergence of adult shell features between the two species of different stocks has been occurred.

Journal

Citations (3)*help

See more

Keywords

Details 詳細情報について

Report a problem

Back to top