日本産普通多足類の後胚発生XXII. : ヤスデの3新種

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1. Fusiulus kurirai sp. nov. Closely resembles F. longus, from which it can be distinguished by the shape of the gonopods. Adult male specimens: length 24-28 mm, width about 1.7 mm, number of segments 50 to 59. A female of 55 segments: length 30 mm, width 2.3 mm. The anterior gonoplds are broader than those of F. longus, and streaked on the ventral surface. The posterior gonopod id slender, with a lamina along the inside, and the distal portion is broadend and brush-shaped. Holotype: 1♀ (Length 28 mm, 59 segments). About 20 additional specimens. Type locality: Sasagamine, Ehime Pref. Aug. 1962 and July 1965. All specimens collected and preserved by the author. 2. Polydesmus miyosii sp. nov. Only other known species of the group in Japan is P. japonicus, from which it can be distinguished by the male gonopods. Length about 9 mm, width about 1.5 mm in both sexes. Color muddy violescent brown, head and proximal half of antennae pale brown. Keels are well developed, and from the 14th segment the posterior angle is produced. Tibia of all legs with a bristle above. Male gonopods are characteristic in the following particulars: coxa with 4 to 5 long setae on the distal end. Canal branch is very well developed, triangular, bended at the end, and tufted bristles are maldistributively on the rear surface. Tibiotarsus is slender dickle, semispirally bended at the distal end, with a subapical tooth, and with a strong basal branch. Holotype: 1♂ (Length 9 mm). Other specimens 1 ♂and 1 ♀. Type locality: Sakuragi, Tanbara-cho, Ehime Pref. Nov. 23, 1965. All specimens collected and preserved by the author. 3. Epanerchodus sasagaminensis sp. nov. Gonopods closely resemble those of E. orientaris, but differ in that the tibiotarsus is more triangulated, the pectimate seta absent on the ventral side, and in having a triangular prosess on the clivus of the femur. Length of male about 19 mm, width about 2.7 mm, and somewhat larger in female. General color is dark reddish brown. The keels are well developed, lateral margin convex, and the posterior angle from the 6th becomes more and more produced on the later ones. The sternites of male between the 3rd to 9th pair of legs with processes. The structure of gonopods of male is shown in figure 3. Holotype: 1♂ (Length 19 mm). Other 1♂and 1 ♀. Type locality: Sasagamine, Ehime Pref., July 30, 1964. All specimens collected and preserved by the author.
社団法人日本動物学会の論文
1966-04-15

日本産普通多足類の後胚発生XXII. : ヤスデの3新種

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