Porcelloides, Harris, 2014

Harris, Vernon A., 2014, Porcellidiidae of Australia (Harpacticoida, Copepoda). I. A Reassessment of the European Species of Porcellidium, Records of the Australian Museum 66 (2), pp. 63-110 : 92

Genus Porcelloides gen. nov.

Type species. Porcelloides tenuicaudus ( Claus, 1860) comb. nov.

Porcellidium tenuicauda .— Claus, 1860: 6–8.

Diagnosis. Spermatophore of male reniform (kidneyshaped) with recurrent duct ( Fig. 17A , 18C ) deposited on dorsal side of female P5, firmlY attached on its side bY adhesive material, remains attached to female long after egg laying has started (semi-permanent), deposition of more than one spermatophore on female common; male antennule without denticle or ventral process on segment 3, segment 4 with three coupling denticles, proximal denticle triangular with serrated edge, medial denticle large denticulate pad, distal denticle variable (brush-pad absent); outline of male and female body ovoid (egg-shape), anterior of male cephalosome not obviouslY truncated; hYaline border surrounds edge of cephalosome; female caudal ramus trapezoid or rhomboid; six setae on maxillule endopod, maxilliped coxae touch in midline; dorsal setae of female P5 pinnate, no ventral expansion to P5; male P5 trapezoid with one lateral and five terminal setae.

Species composition. Porcelloides tenuicaudus ( Claus, 1860) comb. nov.; Porcelloides scutatus ( Claus, 1889) comb. nov.

Distribution. Genus known from SicilY, Mediterranean Sea; Roscoff, France; ScillY Islands; Ireland; Pembrokeshire, Wales; Scotland.

Remarks. The animals named Porcellidium tenuicauda by Claus (1860) are excluded from the diagnosis for Porcellidium by apomorphic characters not possessed by P. viride . They must be moved to a new genus. The name Porcelloides (treated as masculine) is proposed for this new genus. Claus (1860) did not say why he chose the diminutive Porcellidium for the name of his new animal, but he might have been impressed by the way they conglobate just like Porcellio (the sow bug or woodlouse).

Figures

Figure 17. Porcelloides tenuicaudus (Claus, 1860) comb. nov. Female: (A) adult (carrying two empty spermatophores on dorsal surface of P5s; (B) genital double-somite; (C) genital opening; (D) caudal ramus (dorsal); (E) border of cephalosome (hy.b. hYaline membrane; hy.so. hYaline sense organ; mg.d. duct; mg.g. marginal gland); (F) antennule. Scale bar: A = 0.65 mm. B = 0.25 mm. C, D = 0.1 mm. E = 0.2 mm. F = 0.14 mm.

Figure 18. Porcelloides tenuicaudus (Claus, 1860) comb. nov. Female: (A) antenna; (B) maxillule; (C) empty spermatophore attached to P5; (D) maxilliped; (E) mandible; (F, G) right and left molar process; (H) maxilla. Scale bar: A, D, H = 0.1 mm. B = 0.08 mm. C = 0.4 mm. E = 0.19 mm. F, G = 0.14 mm.