Peramphithoe baegryeongensis Kim & Kim, 1988

Kim, Young-Hyo, Hong, Soon-Sang, Conlan, Kathleen E. & Lee, Kyung-Sook, 2012, The genus Peramphithoe Conlan & Bousfield, 1982 from Korean waters (Crustacea: Amphipoda: Ampithoidae), Zootaxa 3400, pp. 1-19 : 4-5

Peramphithoe baegryeongensis Kim & Kim, 1988

( Fig. 2 )

Peramphithoe baegryeongensis Kim & Kim, 1988: 121 , fig. 10. — Kim, 1991: 73.

Material examined. 1 3, Eodal-ri, Donghae-si, 11 August 2006 (K.S. Lee), by fishing net; 2 3, 10 Ƥ, Sageunjin, Gangreung-si, 11 July 2008 (S.S. Hong), by D-frame net; 1 3, Seodo-ri, Geomundo Is., 16 April 2009 (Y.H. Kim), by light trap.

Previous Korean records. Baekryeongdo Is., Imwon ( Kim & Kim 1988), Dumujin, Baekryeongdo Is. ( Kim 1991).

Type locality. Baekryeongdo Is., Yellow Sea, Korea.

Diagnosis. Head longer than wide. Eye circular and small. Lateral cephalic lobes truncate. Epimeral plates 2–3 subquadrate posteroventrally. Antenna 1 weakly setose, peduncular article 1 slightly longer than article 2, with 1 posterodistal spine. Antenna 2 about half length of antenna 1, peduncular article 4 as long as article 5; flagellum setose, about half length of peduncle. Gnathopod 1 propodus subrectangular, palm transverse, limited by 1 spine. Gnathopod 2, male, propodus massive, narrowing distally, slightly concave ventrally, palm corresponding to ventral margin; dactylus falcate, strongly curved. Pereopod 3 basis elongate ovate, expanded anteriorly. Pereopod 5 basis subcircular, slightly wider than long. Uropod 3 peduncle stubby, more than twice the length of rami.

Molecular data. CO1 gene sequences (GenBank accession numbers JN575611 – JN575613 ) were obtained from three specimens. Sequence alignment was straightforward without any insertion or deletion. Intra-specific variation of the CO1 gene sequence of the species ranges between 0.1 and 0.2%, while inter-specific variation ranges from a low of 9.9% ( P. baegryeongensis and P. namhaensis , P. baegryeongensis and P. chujaensis sp. nov.) to a high of 12.0% ( P. baegryeongensis and P. e o a) ( Figure 12 , Table 2 ).

Distribution. Korea.

Peramphithoe P. baegryeongensis P. namhaensis P. chujaensis P. eoa (%) Ampithoe

tea (%) (%) (%) sp. nov. (%) valida (%)

Figures

FIGURE 2. Peramphithoe baegryeongensis Kim & Kim, 1988, male, 7.2 mm, Sageunjin, Gangreung-si, Korea: A, antenna 2; B, carpus, propodus and dactylus of gnathopod 1; C, propodus and dactylus of gnathopod 2; D, coxa and basis of pereopod 6; E, propodus and dactylus of pereopod 6; F, uropod 1; G, uropod 3; H, telson. Scale bars = 0.2 mm (A – G), 0.1 mm (H).

FIGURE 12. Neighbor-joining tree of the five Korean species of peramphithoids with Ampithoe valida the outgroup, based on 657 base pairs of mtCO 1 gene. Values at nodes indicate bootstrap values above 50 %.