Spiropagurus Stimpson, 1858

McLaughlin, P. A., 2003, Illustrated keys to families and genera of the superfamily Paguroidea (Crustacea: Decapoda: Anomura), with diagnoses of genera of Paguridae, Memoirs of Museum Victoria 60 (1), pp. 111-144 : 127

Spiropagurus Stimpson, 1858

Diagnosis. Gills biserial, 11 pairs. Rostrum as broadly rounded lobe. Ocular acicles simple. Crista dentata with 1 accessory tooth. Chelipeds subequal, right usually slightly stronger, but not necessarily longer. Sternite of somite XII (thoracomere 6, pereopods 3) with anterior lobe narrowly subrectangular, occasionally obsolete. Pereopod 4 semichelate; propodal rasp with 1 row of corneous scales; no preungual process. Male with long, usually coiled, terminally blunt sexual tube on coxa of left pereopod 5, right without sexual tube but sometimes with small papilla; pleopods 3–5. Female with pleopods 2–5. Telson with characteristic, acutely triangular posterior lobes ( Fig. 3c ), terminal margins very oblique. Type species: Pagurus spiriger De Haan, 1849 .

Figures

Figure 3. Basic morphology: a, diagrammatic pagurid (whole animal, dorsal view); b, diagrammatic lithodid (whole animal, dorsal view). Cephalothorax or shield, with or without cephalic appendages: c–h Pylochelidae; i, Diogenidae; j, Pylojacquesidae; k–m Paguridae. c, Pylocheles; d, Trizocheles; e, Cheiroplatea; f, Pomatocheles; g, Parapylocheles; h, Cancellocheles; i, Diogenes; j, Pylojacquesia; k, Porcellanopagurus; l, Solitariopagurus; m, Hemipagurus. Abbreviations: aa = antennal acicle; ant. = antenna; antu = antennule; c, cornea; car = carpus; cg = cervical groove; dac = dactyl; ff = fixed finger; irp = intercalary rostral process; la = linea anomurica; lf ch = left cheliped; lf ur = left uropod; lp = lateral projection; lt = linea transversalis; mer = merus; oa = ocular acicle; op = ocular peduncle; P2–5 = pereopods 2–5; pcl = posterior carapace lobe; pcme = posterior carapace median element; pl3–5 = pleopods 3–5; plm = palm; pmp = posterior median plate; pop = postocular projection; pro = propodus; r = rostrum or rostral lobe; rt ch = right cheliped; s = shield; sl1–3 = shield lobes 1–3; t6 = abdominal tergite 6; tel = telson. [a, b, adapted from Sandberg and McLaughlin, 1998; c, d from Forest et al. 2000; e–h, from Forest, 1987; i, from McLaughlin and Clark, 1997; j, from McLaughlin and Lemaitre, 2001c; k, l, from McLaughlin, 2000; m, from McLaughlin, 1997 (as Catapagurus); not to scale.]