Stenothoe dentirama Hirayama & Takeuchi, 1993

Krapp-Schickel, Traudl, 2015, Minute but constant morphological differences within members of Stenothoidae: the Stenothoe gallensis group with four new members, keys to Stenothoe worldwide, a new species of Parametopa and Sudanea n. gen. (Crustacea: Amphipoda), Journal of Natural History 49 (37), pp. 2309-2377 : 2324-2326

Stenothoe dentirama Hirayama & Takeuchi, 1993

( Figure 5 ; Table 1)

Stenothoe dentirama Hirayama & Takeuchi 1993: 170–175 fig. 22–24.

Type locality

Fukushima, Japan .

Material examined

One juv. male 33°N, 129°4 ʹ E, coll. Schönau 2/1895, one fem. ov. Nagasaki Svenson leg., 20/XI/1897, both deposited at SNM .

Three fem. Tagurazaki, Gulf of Osaka, Japan, 30/6/2009 leg. Arimoto, deposited at MVRCr .

One male Curaçao 1462: water-pipe, iron supports in tidal flow, with dense Pennaria , Didemnum , Styela and Microcosmus , 0–1 m depth, 02/01/1964, NBCL ( PWH).

One male Curaçao 1469: Candelchi, W-side, scanty Rhizophora on rocky shore, many oysters with Microcosmus , Styela and Didemnum , 0–1 m, 18/12/1963 depth, NBCL ( PWH).

One?female Klein Bonaire 1049B: reef debris on sandy beach, 0–1.5 m depth, 13/09/ 1948, NBCL ( PWH).

Diagnosis

Length 2.5–3.2 mm. Gn 2 sexually little dimorphic: Gn 2 palm with many short setae and few long ones; dactylus few short setae or naked. U 3 last article scarcely curved, in male strongly sculptured, in female smooth; length of peduncle subequal ramus article 1 subequal article 2.

Remarks

This species clearly belongs to the ‘ Stenothoe gallensis group’ as it has a strongly sculptured last article in the male U 3, although the authors did not discuss the other members at all when comparing it with other Stenothoe . An important and easily differentiating character is the Gn 2 in males which is not or scarcely sexually different from the female.

Distribution

Japan, Caribbean.

Figures

Figure 5. Stenothoe dentirama Hirayama & Takeuchi, 1993: female, Nagasaki: A 1, 2 = antenna 1, 2; Md = mandible; Cx 3, 4 = coxa 3, 4; Gn 1, 2 = first and second gnathopod; P 5, 6 = peraeopod 5, 6; U 1, 2, 3 = uropod 1, 2, 3; T = telson.