Enterohalacarus Viets, 1938

Bartsch, Ilse, 2015, The genital area of Halacaridae (Acari), life stages and development of morphological characters and implication on the classification, Zootaxa 3919 (2), pp. 201-259 : 216-217

Enterohalacarus Viets, 1938

( Figs 41–43 )

Type species. Enterohalacarus minutipalpus Viets, 1938 .

Female. Genital and anal plate fused. About 160 slender pgs around GO. GO with three pairs of internal gac ( Figs 41, 42 ). Genital sclerites with two pairs of short, setiform sgs. Ovipositor at rest short. None of individuals examined with ovipositor everted, but genital spines visible through genital sclerites, i.e. three pairs of slender spines in anterior half of GO and several slender spines in posterior part ( Fig. 41 ). Epimeral pores lacking.

Male. Not known.

Juveniles. In a juvenile stage (deutonymph?) GP and AP separated. GP with about 15 pairs of pgs, two pairs of large internal gac and one (?) pair of sgs (no high magnification possible due to thick layer of mounting medium) ( Fig. 43 ). Larva and protonymph not known.

Remarks. The single species described was found on and in a sea urchin (Echinoidea) that lived in the Halmahera Sea, Moluccas, at a depth of 430 m ( Viets 1938).

Figures

FIGURES 41 – 43. Enterohalacarus minutipalpus Viets, 1938, 41. anterior part of genital plate, female; 42. genital opening, lateral aspect, female; 43. genital plate, nymph. FIGURE 44. Halacarellus capuzinus (Lohmann, 1893), genital region, female. FIGURES 45 – 46. Halacarellus balticus (Lohmann, 1889), female, 45. everted ovipositor, lateral aspect; 46. apex of ovipositor, posteroapical part, lateral aspect. FIGURE 47. Halacaropsis hirsuta (Trouessart, 1889), genital opening, female. FIGURES 48 – 49. Halacarus bisulcus Viets, 1927, 48. genital opening, female; 49. genital opening, male. FIGURES 50 – 52. Halixodes novaezelandiae Bartsch, 1986, male, 50. genitoanal plate; 51. genital sclerites with stump-like, spinose subgenital setae; 52. genital opening (subgenital setae omitted). (aagsp, anteroapical genital spines; bgsp, basal genital spine; gac, genital acetabulum; gsp, genital spines; ov, ovipositor (at rest); pagsp, posteroapical genital spines; sgs, subgenital seta) Scale = 50 µm.