Opetiopoda bulweriae, Stefan, Laura M., Gómez-Díaz, Elena & Mironov, Sergey, 2013

Stefan, Laura M., Gómez-Díaz, Elena & Mironov, Sergey, 2013, Three new species of the feather mite subfamily Ingrassiinae (Acariformes: Xolalgidae) from shearwaters and petrels (Procellariiformes: Procellariidae), Zootaxa 3682 (1), pp. 105-120 : 114-119

Opetiopoda bulweriae sp. n.

( Figs. 7–10 )

Type material. Male holotype ( ZISP 5030) from B. bulwerii (Jardine and Selby) (Procellariidae) , SPAIN, Canary Islands, Lanzarote, Montaña Clara, 19 April 2007, col. J. González-Solís and 4 female paratypes ( ZISP 5031) from same host, CAPE VERDE, Cape Verde Archipelago, Raso Island, 5 July 2006, col. J. González-Solís and E. Gómez-Díaz.

Description. MALE (holotype): Length of idiosoma from anterior end to bases of setae h3 308, greatest width 162, length of hysterosoma 175. Prodorsal shield fused with scapular shields forming entire dorsal shield covering prodorsum; borders between these shields marked by longitudinal furrows; greatest length of prodorsal shield 133, width at posterior margin 119 ( Fig. 7 A). Anterior part of prodorsal shield with a pair of longitudinal crests diverging posteriorly. Setae c1 situated on prodorsal shield near its posterior margins. Scapular setae se separated by 77, setae si situated slightly posterior to level of setae se. Hysteronotal shield: anterior angles fused with humeral shields, length of shield from anterior end to bases of setae h3 170, width at anterior margin about 90, lateral parts with longitudinal furrows stretching from anterior margin to bases of setae f2. Opisthosomal lobes narrow, attenuate apically, with seta h3 on lobar apices. Supranal concavity a narrow median groove. Terminal cleft angular, narrow; length from anterior end to lobar apices 57. Interlobar membrane narrow, occupying entire margin of terminal cleft and forming acute terminal extensions 15 long on lobar apices. Distance between dorsal setae: c2: d2 15, d2: e2 84, e2: h3 35, h3: h3 33, h2:h2 49, ps2:ps2 55.

Sternum about 3/4th of total length of epimerites I. Inner ends of epimerites IIIa free, widely separated, bearing setae 4b on their inner ends. Genital apparatus small, 7.5 × 10, with pair of ovate paragenital sclerites. Setae 4a and g arranged in transverse row posterior to base of genital arch. Adanal shield present, represented by roughly rectangular plate situated anterior to anal opening and anal suckers and bearing setae ps3. Adanal apodemes present, represented by uneven longitudinal sclerites stretching from base of genital apparatus to lateral margins of anal area. Epimerites IVa absent. Anal suckers ovate, corolla with indentations, diameter along long axis 18. Distance between ventral setae: 4b:4b 28, 4b:4a 66, 4b:ps3 55.

Tarsus I with paraxial apical hook, tarsus II without apical spine ( Figs. 8 A, B, E, F). Tibia I, II without ventral processes. Tibia III with small distal spine-like extension at base of solenidion φ; tarsus III with small apical spinelike extension, length of tarsus III 62 ( Fig. 8 C). Tarsus IV 49 long, setae e situated apically, seta d situated at midlevel of segment ( Fig. 8 D). Legs IV, excluding pretarsus, 148 long, extending beyond lobar apices by full tarsus IV.

FEMALE (range for 4 paratypes): Length of idiosoma 345–365, greatest width 160–170, length of hysterosoma 230–250. Prodorsal shield fused laterally with scapular shields forming integral shield completely covering prodorsum and encompassing bases of setae se, si, and c1; length of prodorsal shield along midline 123– 133 ( Fig. 9 A). Scapular setae se 38–48 long, not exceeding half-wide of idiosoma, their bases separated by 98–105. Hysteronotal shield represented by three separate pieces, median piece and a pair of lateral ones. Anterior end of median piece fused with the prodorsal shield with the border between them marked by narrow longitudinally striated furrow; length of median piece along midline 165–185, width at anterior margin 75–83, width at posterior margin 50–53. Setae d1, e1, h1 situated on median piece of hysteronotal shield. Setae d2, e2 situated on striated tegument. Setae h1 situated anterior to level of setae e2. Lateral pieces of hysteronotal shield represented by narrow longitudinal bands, their anterior ends fused with corresponding humeral shields, posterior ends extend beyond level of trochanters IV. Hysteronotal gland openings gl situated on lateral pieces of hysteronotal shield at level of trochanters IV. Distance between dorsal setae: c2: d2 50–53, d2: e2 100–103, e2: h3 60–73, h3: h 3 30–38. Setae h3 and h2 approximately subequal in length.

Sternum formed by fused epimerites I approximately half as long as total length of these epimerites. Epimerites I surrounded by narrow sclerotized areas. Epigynum semicircular, thin, 25–28 long, 43–45 wide, tips not reaching level of genital papillae ( Fig. 9 B). Apodemes of oviporus short, slightly extending beyond inner tips of epimerites IIIa. Setae 4b long, extending slightly beyond posterior ends of oviporus apodemes.

Tarsi I, II without paraxial apical spine ( Figs. 10 A, B). Tibiae I, II without ventral processes. Tarsi III, IV with small apico-dorsal and apico-ventral spines (Figs. C, D). Legs IV extend beyond posterior end of opisthosoma by full tarsus and distal part of tibia.

Differential diagnosis. The new species Opetiopoda bulweriae sp. n. clearly differs from O. anadermura Gaud and Atyeo, 1981 by the following features. In males, the entire shield covering the prodorsum is separated from the hysteronotal shield by a band of striated tegument, legs IV extend beyond the opisthosomal lobe apices by the full tarsus IV, the adanal shield is present, and setae 4a are situated posterior to the level of the genital apparatus; in females, the hysteronotal shield is split into the median part fused with hysteronotal shield and a pair of narrow lateral parts, of which the anterior ends are fused with the corresponding humeral shields, setae d2 and e2 are situated on striated tegument, setae h1 are situated anterior to e2, macrosetae h2 and h3 are subequal in length, the epigynum is semicircular and does not extend to the level of the genital papillae, and setae 4a are long and extend beyond the posterior ends of folds of oviporus. In males of O. anadermura , the shield covering the prodorsum is fused with the hysteronotal shield, legs IV extend beyond the lobar apices by only the pretarsus, the adanal shield is absent, and setae 4a are situated at the level of the genital apparatus; in females, the hysteronotal shield is entire and encompasses bases of setae d2 and e2, setae h1 and e2 are situated at the same transverse level, setae h3 are approximately half as long as setae h2, the epigynum is represented by a high and narrow arch extending by its tips to the genital papillae, and setae 4a are extremely short and do not extend even to the midlevel of the epigynum.

Etymology. The specific epithet derives from the generic name of the type host and is a noun in the genitive case.

Figures

FIGURE 7. Opetiopoda bulweriae sp. n., male. A—dorsal view, B—ventral view.

FIGURE 8. Opetiopoda bulweriae sp. n., legs of male. A – D—dorsal view of legs I – IV, respectively, E—tarsus I, ventral view, F—tarsus II, ventral view.

FIGURE 9. Opetiopoda bulweriae sp. n., female. A—dorsal view, B—ventral view. lp—lateral piece of hysteronotal shield, mp—median piece of hysteronotal shield.

FIGURE 10. Opetiopoda bulweriae sp. n., legs of female. A—tibia and tarsus I, B—tibia and tarsus II, C—tarsus III, Dtarsus IV.