Allokepon hendersoni ( Giard & Bonnier, 1887 )

Duan, Jiangyan, An, Jianmei & Yu, Haiyan, 2008, A new species and two new record species of genus Allokepon Markham, 1982 (Isopoda: Epicaridea: Bopyridae) from China, Zootaxa 1682, pp. 62-68 : 63

Allokepon hendersoni ( Giard & Bonnier, 1887)

( Fig. 1 )

Portunicepon hendersoni Giard & Bonnier, 1887: 186 –188. Allokepon hendersoni ( Markham, 1982: 357) .

Material examined. Infesting Charybdis bimaculata (Miers) . East China Sea, stn. 4055, 29° 30ˏ N, 124° 0 0ˏ E, 70 m, 24 October 1959, Yuhang Cui, coll., CIEP 405501, Ψ, CIEP 405502, ɗ. East China Sea, stn. 4112, 31° 0 0ˏ N, 123° 0 0ˏ E, 51.6 m, 25 October 1959, Yuhang Cui, coll., CIEP 411201, 2Ψ, CIEP 411202, 2ɗ. East China Sea, stn. 4051, 30° 0 0ˏ N, 124° 0 0ˏ E, 63m. 24 October 1959, Yuhang Cui, coll., CIEP 405101, Ψ, ɗ. East China Sea, stn. 4084, 28° 0 0ˏ N, 124° 0 0ˏ E, 98m. 4 July 1959, Yuhang Cui, coll., CIEP 408401, Ψ, ɗ. The East China Sea, stn. 7v- 4, 31° 45ˏ N, 128° 30ˏ E, 104 m, 21 September 1976, Zhican Tang and Zhongyan Qi, coll., CIEP 750401, Ψ, ɗ. East China Sea, stn. 4106, 31° 30ˏ N, 123° 0 0ˏ E, 33.6 m, 7 December 1959, Guangyu Lin and Mingshou Li, coll., CIEP 410601, Ψ, ɗ. East China Sea, stn. 4064, 29° 0 0ˏ N, 123° 0 0ˏ E, 68 m, 4 July 1959, Liren Chen, coll., CIEP 406401, Ψ, ɗ. East China Sea, stn. 4127, 30° 0 0ˏ N, 122° 45ˏ E, 40 m, 12 July 1959, CIEP 412701, Ψ. East China Sea, stn. 4134, 29° 30ˏ N, 123° 0 0ˏ E, 53 m, 20 January 1959, Guangyu Lin and Jinzhao Zhu, coll., CIEP 413401, Ψ, ɗ. East China Sea, stn. 4054, 29° 30ˏ N, 123° 30ˏ E, 69 m, 8 December 1959, Yongliang Wang and Jinzhao Zhu, coll., CIEP 405401, Ψ, ɗ. East China Sea, stn. 4134, 29° 30ˏ N, 123° 0 0ˏ E, 60 m, 25 October 1959, Yuhang Cui, coll., CIEP 413402, 3Ψ, 3ɗ. East China Sea, stn. 4128, 30° 0 0ˏ N, 123° 0 0ˏ E, 53 m, 25 October 1959, Yuhang Cui, coll., CIEP 412801, 2Ψ, 2 ɗ. East China Sea, stn. 4083, 28° 0 0ˏ N, 123° 30ˏ E, 88 m, 4 July 1959, Liren Chen, coll., CIEP 408301, Ψ. Yellow Sea, stn. 0 304, 32° 20ˏ N, 128° 0 0ˏ E, 61 m, 24 August 1964, CIEP 030401, Ψ.

Remarks. Allokepon hendersoni was recorded on Thalamita callianassa from India. The present specimens, especially the females, are very similar to the type specimens ( Giard & Bonnier, 1887). The females have a bilobate head, no coxal plates and a posteriorly directed posterolateral projection on the first oostegite ( Fig. 1 G, H), while the males have midventral tubercles not only on the seven pereomeres but on the pleomeres ( Fig. 1 M). The males differ slightly from the allotype male, in having midventral tubercles on the first two pleomeres. This is the second time the species is found and the first record of Charybdis bimaculata as hosts for a bopyrid isopod.

Distribution and hosts. India, on Thalamita callianassa ; China, on Charybdis bimaculata .

Figures

FIGURE 1. Allokepon hendersoni (Giard & Bonnier, 1887). Female (A – K). A, dorsal view. B, ventral view. C, right antennae. D, barbula, left side. E, right maxilliped, external view. F, palp of right maxilliped. G, right oostegite 1, external view. H, right oostegite 1, internal view. I, right pereopods 5. J, last three pereomeres, showing middorsal projections. K, right pleopod 1 (endopodite 1 in grey). Male (L, M). L, dorsal view. M, ventral view. Scale 1.00 mm for A, B; 0.16 mm for C, F; 0.50 mm for D, E, G, H, I, J, K; 0.22 mm for L, M.