多足類の分類学的並びに形態学的研究 : 8.ヤスデの2新種

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概要

• 論文の詳細を見る

• Nedyopus venustus sp. nov. Body Iength about 18mm, width about 1.3mm in the male. General colour is brown with a wide light longitudinal stripe extending on the middorsal surface the collum to the tail excluding the head. The keels, sternites and legs are yellow but tibia and tarsus of legs have a brown tinge. The dorsal surface is glabrous, and many conspicuous furrows are present on lateral and upper surfaces of the keel. The lateral carinae extend from the first to the sixth dorsal segment, the seventh and posterior segments having none. The fifth sternite of the male possesses a hairly flat lamina, the anterior margin of which curved in slightly. Gonopod of male : Hairly prefemur has a small process on the inner surface of its distal end. the base of femur is not retrograde as is that of N. tambanus, but expands markedly in a proximal direction as shown in the figure. The seminal groove branch runs forward or downward. Ratio of length to width of the male gonopod excluding the prefemur is about 2 : 1. Holotype : One male, Mt. Kirishima of Pref. Kagoshima, April 22, 1956 collected by Mr. S. Koshiyama, and preserved in the auther's collection. Kopidoiulus longus sp. nov. Body length is about 38mm in the male. The general colour is darkish brown, but metazonite possessas brown spots, and the dorsum seems to have many lateral stripes on account of the light stripes on the posterior of each segment. The sternites and the legs are yellow. The anal segment is deep brown. The number of segments is 49. The crypeus is hairly, but setigerous foveolae possess 2 + 2. Ocelli number about thirty. Few transverse furrows are present on the prezonites, and the striate portions of metazonites exist below the level of the repugnatorial pores, the dorsal surface being smooth. The first legs are transformed into long, stiff and stick-like five articles curved deeply as a whole. At the distal end of the fifth article is situated a very small process which is probably a degenerate claw. Gonopod : The anterior gonopod consists of a telopodite and a coxal process. Telopodite is spindle shaped having a seta on the inner surface of the distal end. The coxal process is long, with a small blade situated on one side of the distal half, and a few short seta-like processes on the basal half. Posterior gonopod is a long, slightly bent slender blade, with a ciliated end. The gonopods of the male are represented in the figure. Holotype : One male, Mt. Daisetsu, Hokkaido, July 24, 1957, collected by Dr. H. Kobayashi, and preserved in the auther's collection.

• 社団法人日本動物学会の論文
• 1963-10-15

著者

• 篠原 圭三郎

  東京都立小岩高等学校

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• 多足類の分類学的並びに形態学的研究 : 8.ヤスデの2新種

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