Family ARCTURIDIDAE Poore, 2001

Arcturides cornutus

© Copyright from Studer 1884.

Museums

Regional Maps

• Arcturididae Poore, G.C.B. 2001. Isopoda Valvifera: diagnoses and relationships of the families. Journal of Crustacean Biology 21: 205-230 [226].

Introduction

The cylindrical body, paired horns on the head, and essentially similar ambulatory pereopods characterise the family and its only species, Arcturides cornutus Studer, 1882. The species is often associated with erect hydroids (Hale, 1946; Poore, 2001) and can be abundant.

Diagnosis

Body more or less cylindrical, without coxal dorsal plates or pleonal epimera, straight, without flexion. Pereopod 1 gnathopod-like; pereopods 2–4 stout, with 2 rows of 5–6 well spaced setae, scarcely differentiated from ambulatory pereopods 5–7; with prominent dactyli, unguis short. Uropodal exopod (smaller ramus) tapering (with terminal seta or setae only). Pleopod 1 peduncle more elongate than rami, longer than on other pleopods; exopod of male thickened and with groove on posterior face, ending on tapering distolateral apical extension.

General References

Hale, H.M. 1946. Isopoda-Valvifera. Report of the British, Australian and New Zealand Antarctic Research Expedition B 5: 163-212

Poore, G.C.B. 2001. Isopoda Valvifera: diagnoses and relationships of the families. Journal of Crustacean Biology 21: 205-230

History of changes