日本産スナモグリ上科の巣孔形態
スポンサーリンク
概要
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Burrows of the marine decapod are important structures in substrata of tidal flats along the Japanese coast. Most of the "sand-pipe" closely resemble to the burrows are commonly found in certain Tertiary and Quaternary shallow neritic sediments. The writer believes that observations on recent burrows of different animals may aid in solving the origin and paleoecological significances of " sand-pipes " in Tertiary and Quaternary strata. In this report, the writer deals with the shape of burrows and. phylogeny of Japanese Thalassinidea ; Axiidae, Thalassinidae, Laomediidae, Callianassidea and Upogebiidae. After each burrowing shrimp habits were observed on tidal flats, he made plaster moulds of each ones burrows. Following morphological descriptions of burrows based on these plaster moulds. 1. Thalassinidae and Laomediidae live in the same habitat and their food habits the same. Their shape of burrows are resemble with each other (P1. I, fig. 1, 2). 2. Upogebiidae (blue mud shrimps) and Callianassidae (ghost shrimps) live in the same habitat on the tidal zone, but their food habits and bodies style are very different from each other. The one feeds on detritus that it strains from tne current of water fanned through the burrow, the other feeds on organic detritus in substrata. The chelae of blue mud shrimps are equal in size but the ghost shrimps have a large chelate in right or left. In this case, the burrows of blue mud shrimps (P1. II, fig. 1, 2, 3, 4, 5) have thick muddy lining and small resistance to water current, the other ghost shrimps have thin film like wall and dendritic structures to substrate (P1. I, fig. 3, 4). Especially the globular parts of ghost shrimps burrows are most important feature, because such globular parts are necessary for their food habits. 3. The writer considered the phylogeny of Thalassionidea based on the habits, shape of burrows and geological occurrences. The phylogeny of Thalassionidea shown in figure 3.
- 地学団体研究会の論文
- 1967-01-30