Redescription Based on Chevreux’ s original description, completing it: Length 3 mm. Head scarcely produced, with minute rostrum. Ocular lobe truncate. Eyes rounded, rather small. Antenna 1 longer than head and peraeonites 1 – 4, subequal to antenna 2; peduncle length of art 1> art 2; flagellum with about 17 – 22 articles; accessory flagellum absent. A 2 peduncle length of art 4> art 5, flagellum <peduncle, about 16 – 18 arts. Mouthparts: mandible palp absent, with conical hump where insertion would normally occur. Maxilla 1 palp 2 - articulate. Maxilla 2 outer plate sitting upon inner one one. Maxilliped inner plate linguiform, with two distal setae; outer plate lacking. Peraeon. Peraeonite 4 not elongate, wider than peraeonite 3. Gnathopods 1 – 2 dissimilar in shape. Gn 1 subchelate; length of propodus> merus + ischium together; length of propodus = 2 × length of carpus; merus enlarged, produced distally, the tip reaching end of carpus; carpus triangular, l ≥ b; propodus 2 × as long as broad, palm equal to remaining hind margin, group of defining setae small and not strong; palm rounded, oblique, propodus on palmar corner widest. Coxa 2 anterior margin rounded, posterior margin excavate, distally narrowing or rectangular. Gnathopod 2 male basis anteriorly widened, sometimes with crenulate margin; merus posterior margin rounded, crenate, with a setule in each notch; propodus posterior margin straight, palm reaching proximal end of propodus, thus no posterior margin remaining, palmar corner lacking, with two posterodistal humps, the proximal higher; propodus about 2.5 – 3 × as long as broad, palm with dense row of fine short setae; dactylus reaching end of propodus, inner margin beset with setae of the similar length as on propodus. Peraeopods: Coxa 3 distally somewhat widening. P 3, 4: similar to each other. Pleon. Uropods: U 1 reaching end of U 3; with prominent peduncular spur; peduncle> rami, rami subequal, spinose. U 2 shorter than U 1 or U 3, rami subequal. U 3 peduncle equal to ramus, ramus art 1 ≥ art 2, art 1 beset with 2 – 3 spines along the upper margin, with pair of distal spines, ramus art 2 upwards bent in the middle and regularly sculptured on the upper surface. Telson concave on the upper side, oblong, with three spines on the proximal half of each side. Female: Gn 2 propodus palm convex, without palmar corner, but four nearly equidistant spines. U 3 last article straight and not rugose.
Sumber: 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)