Goreopagurus McLaughlin, 1988

Lemaitre, R., 2003, New species of Goreopagurus (Decapoda: Anomura: Paguridae) from Tasmania and reevaluation of sexual tubes in hermit crab systematics, Memoirs of Museum Victoria 60 (2), pp. 221-227 : 222

Goreopagurus McLaughlin, 1988

Emended diagnosis. Eleven pairs of biserial or distally quadriserial phyllobranchiate gills. Ocular acicles triangular, with prominent submarginal spine, separated basally by basal width or more of 1 acicle. Antennal peduncle with supernumerary segmentation. Maxillule with internal lobe moderately well developed and provided with 1 or 2 stiff distal bristles; external lobe produced, not recurved. Third maxilliped with well developed crista dentata and prominent accessory tooth; merus with or without dorsodistal and ventral marginal spines. Sternite of third maxillipeds with or without small spine on either side of midline.

Right cheliped with elongate, slender chela; propodal-carpal articulation generally perpendicular. Carpus tending to be strongly produced ventrally, at least in large males, dorsomesial margin slightly to prominently expanded. Left cheliped appreciably shorter than right; chela slender, triangular in crosssection; propodal-carpal articulation perpendicular. Sternite of third pereopods with anterior lobe variable in shape. Fourth pereopods with propodal rasp consisting of single row of corneous scales; dactyl with or without preungual process. Fifth pereopods chelate. Sternite of fifth pereopods consisting of 2 ovate or subcircular lobes.

Mature males with coxae of fifth pereopods generally symmetrical; gonopore of right without or with vas deferens produced as short sexual tube; gonopore of left without or with vas deferens produced as very short tube or papilla; 3 unpaired uniramous or weakly biramous pleopods developed on left side of abdominal somites 3–5, very rarely vestigial pleopod on somite 2. Females with paired gonopores; well developed, paired and modified first pleopods; 4 unpaired pleopods, second to fourth unequally biramous, fifth with endopod rudimentary or absent.

Abdomen flexed. Uropods asymmetrical. Telson with transverse indentations; posterior lobes symmetrical or slightly asymmetrical; separated by small median cleft; terminal margins oblique or straight, each armed with few to several small spines; lateral margins frequently delimited by narrow chitinous plate.