日本産普通多足類の後胚発生XVI. : ハガヤスデ亜科の2新種

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All members of the subfamily Pyrgodesminae that are known in Japan can be separated by the use of following key: 1. Anterior margin of the collum divided into 2 large, strongly incised lobes Each of them with several and shallow incisions..........Pseudocataphyrgodesmus glaucus MIYOSI Anterior margin of the collum divided into 12 equal, deeply incised lobes. Coxa of the gonopod large, not conchoidal..........Rhipidopeltis sinuata MIYOSI Anterior margin of the collum divided into 10 equal, deeply incised lobes. Coxa of the gonopod large and conchoidal..........2 2. Between dorsal crests of large tubercles on each medial metatergite are arranged small tubercles completely in 2 rows. Telopodite of the gonopod without free solenomerite, and spermal chanal runs in a short branch near the base of telopodite..........Ampelodesmus granulosus MIYOSI Between dorsal crests of large tubercles on each medial metatergite are arranged small tubercles in 2 rows on the anterior half, but in one row on the posterior half. Telopodite of the gonopod with free solenomerite..........3 3. Dome of collum with 10 large tubercles, of which the central 4 are conspicuously large. Distal portion of the solenomerite horn-shaped..........Ampelodesmus corniger sp. nov. Dome of collum with 12 large, nomal tubercles. Distal portion of the solenomerite wingshaped..........Ampelodesmus iyonis sp. nov. Ampelodesmus iyonis sp. nov. Body composed of 20 segments in both sexes. Length 6.0-6.5mm in male and 6.5-7.0mm in female. Color dark green or greyish green. Collum large and dome-shaped, completely covering the head. Its anterior margin is horizontal and divided into 10 equal, deeply incised lobes (Fig. 1, B and C). Dome of collum with 12 large, rounded tubercles arranged in 2 series of 4 and 8. Metatergites 2 through 19 with 4 longitudinal crests composed of large tubercles, and between the 2 dorsal rows of the crests are arranged small tubercles (See Fig.3, Q and R). Anal segment with 6 large tubercles. Repugnatorial pores present on segments 5, 7, 9, 10, 12, 13, and 15-19, the pores 17-19 being placed on the dorsal surface of keels, and they are very small. Lateral margin of all non-poriferous segments except segment 2 are divided into 2 lobes. The gonopods are shown in Figures 1 and 2. The Coxa is very large and conchoidal, broadly extending thin and transparent board at dorsal side (cp). Prefemur moderately long and normally setiferous. Femur is rather long, strongly bent, and with femoral process (fp) and a accessory blade (ab). The distal portion of the telopodite essentially divided into a solenomerite and tibiotarsus. The solenomerite projecting apparently spoirally, and distal portion wing-shaped (sl). Tibiotarsus show in Figure (tt). Holotype: A male 6.5mm in length, Allotype: A temale 6.8mm in length, Paratypes: Both sexes many specimens. All types are collected by the author. Locality; Oshima, Niihama, Ehime Pref. March through October 1961. Types are preserved in the author's collection. Amplodesmus corniger sp. nov. Resembles A. iyonis, but distinguished by the characteristics of the telopodite of the gonopod and large tubercles on the collum. Length about 6.0mm in male and 7.0mm in female. Color dark green. Collum large and dome-shaped, the incision of the anterior margin is 10 equal lobes. Dome of collum with 10 large tubercles arranged in 2 series of 4 and 6, of which 4 central tubercles are conspicuously large (Fig. 3, L). It may be a specific character. The gonopods are given in Figure 3. Coxa and prefemur as in A. iyonis. Femur very well developed, broad, and the ventral side of median region is ringed (fr). Femoral process is simple (fp). Distal portion of the solenomerite is horn-shaped. (sl). Holotype: A male 6.0mm in length, Allotype: A female 7.0mm in length. Other specimens 2 males and 3 females. Types are collected by the author. Locality: Mt. Irazu (Near Mt. Higashi-Akaishi) Umagun, Ehime Pref. April 2, 1963. Types are preserved in the
社団法人日本動物学会の論文
1964-03-15

日本産普通多足類の後胚発生XVI. : ハガヤスデ亜科の2新種

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