Anomura: Families

P. McLaughlin, S. Ahyong & J.K. Lowry

Chirostylidae Ortmann, 1892

Common name. Squat lobsters.

Description. Carapace dorsoventrally flattened, carapace longer than wide; carapace with linea anomurica; outer orbital spines present, or absent; rostrum overreaching distal corneal margin, or not overreaching bases of corneas, or reduced. Eye cornea well developed, or reduced; ocular acicles absent. Antenna 1 flagellum biramous. Maxilliped 3 bases close together, or bases widely separated; crista dentata present; accessory tooth absent; dactylus simple.

Pereopod 1 chelate; cheliped equal or subequal. Pereopods 2 to 4 pereopods 2 to 4 all of similar form; 2-4 with basis and ischium fused; dactyli of pereopods 2 to 3 simple. Pereopod 3 about the same length as pereopod 2, or shorter than pereopod 2; pereopods 3 dactyli and propodi of right and left similar. Pereopod 4 simple. Sternum partially divided; sternite of pereopod 5 reduced, contiguous with preceding sternite, or absent; somite of pereopod 5 not fused with first abdominal somite.

Abdomen well developed, carried posteriorly or well developed, carried under thorax, abdomen with distinct somites. Epimera (pleura) present. Male pleopods 3-5 paired; pleopods 1 and 2 modified as gonopods. Male with no other sexual modifications; female with no sexual modifications. Uropods present, uropods positioned ventrolaterally, forming tailfan; rami unmodified. Telson present, with transverse suture.

Larval development. Metamorphic.

Superfamily composition. Galatheoidea.

Generic composition. Chirostylus Ortmann; 1892; Eumunida Smith, 1883; Gastroptychus Caurelly, 1896; Pseudomunida; Uroptychus Baba, 1988.

Habitat. Marine.

Distribution. Worldwide except Arctic and Antarctic.

Cite this publication as: ' McLaughlin, P., S. Ahyong & J.K. Lowry (2002 onwards). 'Anomura: Families.' Version: 2 October 2002.'.