Paradiplogynium nahmani Seeman

Seeman, Owen D., 2012, Diplogyniidae (Acari: Mesostigmata) associated with Panesthia cockroaches (Blattodea: Blaberidae), Zootaxa 3163, pp. 33-53 : 49-50

Paradiplogynium nahmani Seeman

Type specimens examined: Holotype female, Duck Ck, Lamington National Park, Qld, 15 Nov 1996, O.Seeman, ex Titanolabis colossea , QMS 73814. Paratype male, same data as holotype, QMS 73815.

Other specimens examined: Southeast Queensland: Ten males, six females, Hampton, 3 Oct 1956, G.F.B., ex Panesthia laevicollis (= Pan . cribrata ) from eucalypt log ( J12243 –51, J12253 –59); two males, one female, Dalby Banga, 25 Dec 1925, H. Geary, ex blattid (these misidentified by Womersley (1958) as Par. panesthia ); three males, one female, Fire Tower Rd, Jimna State Forest, 16 Feb 1999, O. Seeman, ex Pan . cribrata ; one male, five females, Plank Bridge, Jimna State Forest, 18 Feb 1999, O. Seeman, ex Pan . cribrata ; three males [Lamington] National Park, R. Illidge, ex pinned Pan . cribrata ; one female, Brisbane, 21 Aug 1918, H. Hacker, ex pinned Pan . cribrata ; one male, Brisbane, 20 Jul 1918, H. Hacker, ex pinned Pan . cribrata ; one female, same data except from different Pan . cribrata specimen. All in QM. Northeast Queensland: Three females, four males, Bluewater Range, 50 km WNW Townsville, 6–8 Dec 1986, 7– 800 m alt., RF, Monteith, Thompson & Hamlet coll., ex pinned Pan . sloanei ; one female, Curtain Fig, 2 km S Yungaburra, 8 Dec 1988, 700 m. alt, Monteith & Thompson, ex pinned Pan . ancaudellioides ; one male, Bloomfield Rd, via Helenvale, 20–27 July 1974, Monteith & Cook, ex pinned Pan . ancaudellioides . All in QM.

Description (based on Southeast Queensland specimens from P . cribrata)

Female

Dorsal idiosoma 715–790 long, 550–605 wide. Podosoma with 20 pairs of setae (j1, j3–6, z1, z3–6, s1–6, r3–6) and one unpaired seta (j2); opisthosoma with 14 pairs of setae (J1–5, others tentatively designated as Z1–5, R1–4). Setae j1 58–63, barbed, Z5 85–95, smooth, J5 25. Other setae in series jJ, zZ, and s 17–25 long (S3 absent), tending to be longest in s series. Setae r3 35–38, r4 45–50, r5 40–45, r6 40–50; R 1 25–34, R 2 25–30, R3 60–70, R4 155–185, all weakly barbed. Lyrifissures idz1 and idr3 present; dorsum with 13 pairs of glands. Dorsal shield covered with fine reticulation, weaker medially.

Ventral idiosoma. Sternal shield reticulate, concave posteriorly, 80–86 long in midline, 145–173 long from anterolateral to posterolateral corner, 209–231 wide at widest point; with three pairs of setae, two pairs of lyrifissures and one pair of pores. Setae st 1 31–35, curved, st2 33–36, st 3 29–31, smooth. Distance between setae st1–st1 98–105, st2–st2 94–100, st3–st3 adjacent, st1–st2 5–8, st1–st3 78–90. Setae st 4 18–20, on free paired metasternal shields, which have their anterior edges beneath the posterior margin of the sternal shield. Tritosternum 145–162 long, base 12 long, laciniae pilose, dividing 110 from base. Latigynal shields each 123–135 long, 83–89 wide, with one pair of pores and one pair of setae, 18–20 long, anterior and medial margins (to mesogynal shield) thickened, anterior margin strongly invaginated, shields reticulated. Mesogynal shield rectangular, 48–57 long, 18–21 wide, overlapped by latigynal shields in anterolateral region. Vaginal sclerites 95–101 long, meet medially at a small porose plate. Ventral shield fused with exopodal shield, with dense reticulation medially becoming sparser laterally; ventral shield embraces a membranous anal region; setae Jv1–3, Zv2 smooth, 20–28 long; 4–5 pairs of irregularly placed pores anterior to anus; two pairs of smooth setae (Jv4–5), one pair of lyrifissures and one pair of pores laterad and posterior to anus. Anal plates surrounded by membranous region 83–100 long, 90–113 wide. Marginal shield with 2–3 pairs of pores and one pair of setae (Zv4); shields just meeting behind ventral shield. Peritreme extending to coxa I. Body holding up to four eggs.

Gnathosoma . Hypostome with four pairs of weakly barbed setae, h1 33–40, h2 50–58, h 3 25–35, palpcoxal seta 25–30. Corniculi slender, 43–45 long. Gnathotectum triangular, with ventro-median keel, coming to a sharp point. Palps unspecialised, setal counts from trochanter 2-5-7-15 -16 setae; apotele 2-tined, but with tiny basal prong. Fixed digit of chelicerae with 11 teeth (anterior two tiny), minute pilus dentilis, cheliceral seta, and serrated process; moveable digit with 9–10 teeth (most anterior tiny), proximally with 7–8 minute teeth, and three excrescences: one short and brush like, one with minute papillae and only slightly longer than cheliceral digits, the other extending 30–42 past tip of moveable digit and covered with numerous papillae.

Leg s. Chaetotaxy typical for the genus. Femur I elongate, seta pd1 35–37, pd 2 30–36.

Male

Dorsal idiosoma 655–740 long, 490–570 wide. Dorsal setae as in female, R4 170–173, barbed, and Z5 83–100, smooth. Holoventral shield reticulate, with densest reticulation medially. Setae st 1 18–20, curved, flanking tritosternum base, st 2 22–25, st 3 22–25, weakly blade–like, adjacent and on bulbous projection 48–52 wide, also bearing a cluster of glands and their associated pore opening. Setae st4 20, well behind (108–130) st2 and st3. Setae st 5 13–17 long. Tritosternum bifurcate, laciniae barbed; base broad, 49–40 wide, plus a smaller basal plate and broader area of soft cuticle. Genital opening beneath anterior margin of holoventral shield. Holoventral shield fused with exopodal shield and embracing a membranous anal region; four pairs of setae and 3–4 pairs of irregularly placed pores between anterior margin of anal membrane and CxIV; one pair of pores and one pair of setae lateral to anal membrane; one pair of setae, lyrifissures and pores posterior to anal membrane. Anal membrane 85–94 long, 95–108 wide. Marginal shield with 4–5 pairs of pores and one pair of setae; shields just meeting behind ventral shield. Hypostome with four pairs of weakly barbed setae, h 1 25–31, h2 38–56, h 3 25–32, palpcoxal seta 23. Corniculi slender, 32–38 long. Gnathotectum with rounded tip. Chelicerae as in female, except the base of the moveable digit of the chelicera has two scoop-like lobes (one is 25 long), and a larger (40–45 long) somewhat sclerotised scoop-like excrescence; large papillate excrescence extends 45 past tip of moveable digit. Legs as for female.