Bradyagaue Newell, 1971

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 : 213

Bradyagaue Newell, 1971 Fig.

( Figs 28–31 )

Type species. Halacarus drygalskii Lohmann, 1907 .

Adults. In female and male GP and AP fused. Female GA with 5–15 pairs of slender pgs, zero to one pair of sgs and three pairs of large, tube-like gac ( Fig. 28 ; Newell 1984: fig. 201). Ovipositor at rest extending beyond GO. Genital spines slender, number not known. Male GA with more than 100 pgs densely arranged on slightly raised area around GO. Male GO somewhat smaller than that of female; GO in both male and female in ventral position. Each genital sclerite with five short sgs, often two anterior pairs slightly separated from three posterior ones, fourth pair (sgs-4) stump-like ( Newell 1984: fig. 184). Male with three pairs of large internal gac ( Fig. 29 ). AE of adults without epimeral pores.

Juveniles. One larval and two nymphal stages known. In nymphs GP separated from AP. Deutonymphal GP with two pairs of large internal gac, one pair of pgs and two pairs minute sgs ( Fig. 30 ; Bartsch 1992d: fig. 9). Protonymphal GP very small; with one pair of large gac ( Fig. 31 ); pgs and sgs not developed. AE of nymphs without, of larvae with pair of epimeral pores ( Bartsch 2004a: fig. 14).

Remarks. Almost 20 species are known, often they are found associated with hydrozoans in polar waters but are present also in warm-temperate areas. Records are from shallow water to the deep sea ( Bartsch 2009a).

Figures

FIGURES 28 – 31. Bradyagaue drygalskii (Lohmann, 1907), 28. genital opening, female; 29. genital opening, male (subgenital setae omitted); 30. genital plate, deutonymph; 31. genital plate, protonymph. FIGURES 32 – 33. Camactognathus tesselatus (Morselli & Mari, 1982), 32. genital opening, female; 33. genitoanal plate, deutonymph. FIGURES 34 – 35. Coloboceras longiusculus Trouessart, 1889, 34. genital opening, female; 35. genital plate, deutonymph. FIGURE 36. Copidognathides ampliatus Bartsch, 1999, genital opening, male. FIGURE 37. Copidognathus magniporus Bartsch, 1973, genital opening, female. FIGURE 38. Copidognathus magnipalpus (Police, 1909), genital opening, female. FIGURE 39. Copidognathus caelatus Bartsch, 1994, genital opening and everted ovipositor, ventral aspect. FIGURE 40. Copidognathus wadjemupis Bartsch, 1999, everted ovipositor, ventral aspect. (agsp, apical genital spines; bgsp, basal genital spine; gac, genital acetabula; pgs, perigenital setae; sgs, subgenital seta) Scale = 50 µm.