日本産普通多足類の後胚発生 XIV : フルイシムカデの1新種

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Subgenus Archlithobius is the most primitive Lithobius-group. The subgenus shows various degrees of differentiation in number of articles of antennae and prosternal teeth. Accrding to the degrees of differentiation, the subgenus may be divided into the four following groups: Group I…Articles of antennae 25 or more, prosternal teeth 3+3 or more. (distributed in Europe) Group II…Articles of antennae 25 or more, prosternal teeth 2+2. (distributed in Europe) Group III…Articles of antennae 19 to 23, prosternal teeth 3+3 or more. (distributed in Asia) Group IV…Articles of antennae 19 to 23, prosternal teeth 2+2. (distributed in Asia) Both groups III and IV are found in Asia, being equivalent to the "vosseleri-group" named by Verhoeff. So far as the author is concerned, 26 species belonging to these groups are recorded as shown in the list. The north American genere, Paobius and Arebius seem to be very closely related the subgenus Archlithobius. However, as shown in Table 1, certain Japanese species belonging to the subgenus, are given generic names other than Lithobius by several authors. This point is a future problem. The present new species to group IV, and is distinguished from the other species of the group chiefly by the modification on the penult and anal legs of the male, Lithobius (Archlithobius) takashimai sp. nov. Body length: 12-14mm. Color: Penult and anal legs are yellowish brown; the other parts are dark brown. Antennae: Mostly with 19 (18-22) articles, about 4mm. All articles were longer than width. Cephalic Plate: Head length as large as its width. Ocelli: 6 in two series. Position of the organ of Tomosvary is shown in Fig. 1 H. Prosternal teeth: 2+2, small, a line of outside is shown in Fig. 1 E. Tergites: All the tergites are without posterior angles. The 8th, 10th, 14th, and 15th posterior margin of tergites are incurved. Legs: All tarsi are divided into two parts. Penult and anal legs of male have a shallow and wide hollow on the dorsal surface of the femur and tibia (Fig. 1 A, D, and J). Such special modification is not found in the female. Spinulation of the last four legs are shown in Table 2, and plectrotaxy of the male holotype is shown in Table 3. Coxal pores: Present on the 12th-15th legs, consisting of mostly 2-3 small circular pores (Fig. 1 B). Gonopods: Basal spurs of female 3+3, claw with a lateral tooth (Fig. 1 F and G). An appearance of gonopods of male is shown in Fig. 1 C. Holotype: 1♂; Allotype: 1♀; Paratypes: 10 specimens. All the types were collected by the author on April 2, 1960. Locality: Oshima, Niihama, Ehime Pref. Types are preserved in the author's collection.
社団法人日本動物学会の論文
1963-07-15

日本産普通多足類の後胚発生 XIV : フルイシムカデの1新種

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