Diagnosis. Gills biserial, 11 pairs. Rostrum as weakly and obtusely subtriangular, broadly rounded or obsolete lobe. Ocular acicles simple. Crista dentata with 1 accessory tooth. Chelipeds moderately long and slender; subequal, with right generally slightly longer and/or more robust. Sternite of somite XII (thoracomere 6, pereopods 3) with subsemiovate to roundly rectangular anterior lobe. Pereopod 4 semichelate; propodal rasp with 1 row of scales; no preungual process. Male with moderate to long, often distally filamentous, sexual tube on coxa of right pereopod 5, orientated from right to left across ventral body surface; coxa of left with papilla, very short or short sexual tube; pleopods 3–5. Females with pleopod 1 paired, modified; pleopods 2–5. Telson with terminal margins straight, rounded, somewhat oblique, or prominently oblique. Type species: Nematopagurus longicornis A. Milne-Edwards and Bouvier, 1892.