Dactylokepon caribaeus Markham, 1975

An, Jianmei, Yu, Haiyan & Williams, Jason D., 2007, Four new records and a new species of Dactylokepon Stebbing, 1910 (Epicaridea: Bopyridae: Ioninae) from Chinese waters, Journal of Natural History 41 (33 - 36), pp. 2063-2079 : 2072-2073

Dactylokepon caribaeus Markham, 1975

( Figure 5 )

Dactylokepon caribaeus Markham 1975, p 61 –66, Figures 4–6 [Type locality: SE coast of Dominican Republic; infesting Iliacantha subglobosa Stimpson and Iliacantha liodactyla Rathbun ]; Adkison 1982, p 702 –703, Figure 1 .

Material examined

Infesting Randallia trituberculata Sakai. South Sea, Stn 6094, 19 ° 009N, 112 ° 309E, 270 m, 19 April 1959, Fuzeng Sun coll., 1♀, CIEL609401 , 1 „, CIEL609402 , 1♀ (immature), CIEL609403 .

Remarks

Three species of the genus Dactylokepon are found on members of the Leucosiidae , D. caribaeus Markham, 1975 is found on Iliacantha subglobosa and I. liodactyla in the Caribbean, D. sulcipes Adkison, 1982 is found on Callidactylus asper Stimpson, 1871 in Mexico, while D. marchadi Bourdon, 1967 is found on Pseudomyra mbizi Capart, 1951 in Senegal. The present material agrees well with the original description ( Markham 1975) except for some minor points. This species was well described and illustrated by Markham (1975); Adkison (1982) then reported this species from the same locality and the same hosts, but provided a redescription with additional notes on its characteristics. In the present reference female ( Figure 5A ), the tergal projections are not as smooth as in the holotype; the frontal lamina edge is smooth and the barbula is slim and pointed ( Figure 5B ) rather than stout and blunt. The first oostegite ( Figure 5C ), all pleopods ( Figure 5D ), and the uropod ( Figure 5E ) are similar to those of the holotype. In addition, the immature female ( Figure 5F ) has small eyes, a short frontal lamina, without tergal projections or posterlateral bosses on all pereomeres. Margins of lateral plates and pleopods are simple. The present reference male ( Figure 5G ) is similar to the allotype of D. caribaeus : head pentagonal, eyes near posterior border, without midventral projections on pereon. This is the first record of a bopyrid infestation on the host Randallia trituberculata Sakai. Previously , D. caribaeus was known only from the Caribbean.

Distribution and hosts

SE coast of Dominican Republic, on Iliacantha subglobosai Stimpson and Iliacantha liodactyla Rathbun ; South Sea, China, on Randallia trituberculata Sakai.

Figures

Figure 1. Dactylokepon richardsonae Stebbing, 1910. (A–H) Reference female: (A) dorsal view; (B) left antennule; (C) left antenna; (D) right maxilliped, external view; (E) barbula (left side); (F) left oostegite 1, external view; (G) left oostegite 1, internal view; (H) right pleopod 1. (I–K) Reference male: (I) dorsal view; (J) ventral view; (K) ventral view of pleomeres of another male (no. CIEP3901). Scale bar: 1 mm (A); 0.28 mm (B, C); 0.62 mm (D, F, G, H); 0.36 mm (E); 0.33 mm (I, J, K).

Figure 4. Dactylokepon holthuisi Bourdon, 1967, reference male, SEM micrographs. (A) Ventral view; (B) right antennae; (C) pereopods 1–2, left side; (D) pereopods 3–4, left side; (E) ventral view of posterior pleomeres 5–6. Scale bars: 1 mm (A); 100 Mm (B–E).

Figure 5. Dactylokepon caribaeus Markham, 1975. (A–F) Reference female: (A) dorsal view, with male in situ; (B) barbula (right side); (C) right oostegite 1, external view; (D) right pleopod 5; (E) uropod; (F) immature female (no. CIEL609403). (G) Reference male (no.CIEL609402), dorsal view. Scale bar: 1 mm (A); 0.48 mm (B, C); 0.89 mm (D–F); 0.40 mm (G).

Figure 6. Dactylokepon barbuladigitus new species. (A–K) Holotype female: (A) dorsal view; (B) ventral view; (C) left antennae; (D) right maxilliped, external view; (E) barbula (right side); (F) right oostegite 1, external view; (G) right oostegite 1, internal view; (H) left pereopod 2; (I) right pleopod 3; (J) right pleopod 4; (K) right pleopod 5. (L) Allotype male (no.CIEX604502), dorsal view. Scale bar: 1 mm (A, B); 0.18 mm (C); 0.31 mm (D, E); 0.45 mm (F, G); 0.15 mm (H); 0.26 mm (I); 0.69 mm (J–L); 0.39 mm (M).