Ascid mites (Acari: Mesostigmata: Ascidae) from Costa Rican hummingbirds (Aves: Trochilidae), with description of three new species and a key to the Proctolaelaps belemensis species group Dusbabek, Frantisek Literak, Ivan Capek, Miroslav Havlicek, Martin Zootaxa 2007 1484 51 67 Dusbabek & Literak Dusbabek & Literak [151,701,855,881] Arachnida Ascidae Proctolaelaps Animalia Mesostigmata 2 53 Arthropoda species threnetes sp. nov.    Typematerial:Female holotype, male paratypeand five female paratypesex  Threnetesruckeri(Bourcier, 1847), Costa Rica, Barbilla NP, 570 melevation, September 2004, coll. I. Literak. Female holotype, male paratypeon one slide deposited at the typecollection of the Biology Centre of the ASCR, Institute of Parasitology, Ceske Budejovice, Czech Republic, under the accession number CSAV2005. Paratypesare deposited in the collection of the British Museum (Natural History), London, UK, in the Museum of Biological Diversity, the Ohio State University, 1315 Kinnear Road, Columbus, OH 43212, USA, and in the Instituto Nacional de Biodiversidad, P.O.Box 22-3100, Santo Domingode Heredia, Costa Rica.  Material examined.Two males and 25 femalesex 6 specimensof the same host, locality and data as the holotype; 2 malesand 26 femalesex 7 specimensof  Eutoxeres aquila(Bourcier, 1847), 3 femalesex  Phaethornis superciliosus(L., 1766) and 2 femalesex one specimen of  Chalybura urochrysia(Gould, 1861)of the same data and locality; 2 femalesex  Threnetesruckeri, Hitoy Cerere BR, August 2004; 3 femalesex 3 specimensof  Phaethornis superciliosusand 3 femalesex 2 specimensof  Phaethornis longuemareus(Lesson, 1832)of the same data and locality; all coll. I. Literak.   Diagnosis.Species of the  P. belemensisgroup with setae j1and r3with lateral bulbous swelling. Relatively large species, with female body length frequently exceeding 600 μm. Dorsal plate with 43 pairs of setae, setae r2–r6on the plate. Setae j5short (15–22) setae z5long (32–39), setae S5 long (42-54). Spermatodactyl of male very long (250–332), strong ventral spine on femur IV absent.   Female( Holotype). Dorsum: Unfed specimen with body length 564 ( 614–620 infive paratypes), width 385 (401–420). Dorsal plate 552 (539–570) long, 376 (351–401) wide, finely structured, with row of small denticles on its anterior margin. There are 43 pairs of setae on the plate, series j, zand seach with 6 pairs of seta, series rwith 5 pairs. Series J, Zand Seach with 5 pairs of setae. Setae j1and r3with lateral bulbous swelling, setae Z5setiform. Setae j1measuring 44 (40–44), j517 (15–22), z532 (32–39), r232 (30–36), r342 (40–47), J512 (12–15), S551 (42-51), Z593 (88–95). Peritreme reaching setae z1, peritremal plate narrow.  Ve n te r: Sternal plate 137 (135–164) long (presternum included), 137 (133–147) wide, finely structured, with 3 pairs of sternal setae and 2 pairs of lyriform pores. Setae St1length 38 (37–42), St2and St344 (41–44), Mst44 (42–49). Distance St1–St256 (54–61), St2–St337 (34–39). Genital plate broad and rounded at the end, slightly enlarged posterior to coxa IV, finely structured. Genital setae 39 (37–44) long. Anal plate egg-shaped, anal setae situated at posterior margin of anal pore, 113 (103–115) long, 78 (74–87) wide. Adanal setae 22 (22–27), post-anal seta 74 (69–95) long. Unsclerotised integument with 15 pairs of setae, some of them with lateral bulbous swelling. Setae Jvl37 (39–44) long, Jv249 (41–54), Jv587 (74–88). Endopodal platelets present, metapodal platelets small and narrow ( 32x8), situated posterior to coxa IV.   FIGURES 1–4.  Proctolaelaps threnetesDusbabek & Literak,  sp. nov.Fig. 1. Female dorsum. Fig. 2. Female venter. Fig. 3. Male dorsum. Fig. 4. Male venter.   FIGURES 5–9.  Proctolaelaps threnetesDusbabek & Literak,  sp. nov.Fig. 5. Chelicera and spermatodactyl of male. Fig. 6. Leg II of male, ventrally. Fig. 7. Leg IV of male, ventrally. Fig. 8. Epistome of female. Fig. 9. Chelicera of female.   Gnathosoma: Deutosternumwith 7 rows of denticles, 5th and 6th rows widened and curved. Corniculi pointed and curved inward. Epistome rounded and strongly toothed. Fixed chela with three fine subapical teeth, movable chela with three lateral teeth and membranous lobe. Inner seta on palpfemur and palpgenu flattened at the tip.  Legs: Tibia III with 8–9 setae, tibia IV with 10 setae.  Male. Dorsum: Body oval, 483 long ( 478–489 infive paratypes), 326 (282–314) wide. Dorsal plate 458 (464–480) long, 307 (280–310) wide, with fine scale-like structure as shown on figures, covered with 43 pairs of setae. All setal series complete, except rseries lacking setae r1. Setae r2–r6and R1–R5situated on the plate. Setae j1and r3strong, with lateral bulbous swelling. Setae j1spine-like, 37 (32–37) long, setae j5short, measuring 27 (17–23) only, setae z5longer, measuring 32 (30–34). Setae J5minute, 12 (11–12) long, setae Z5stout, spine-like, 78 (74–83) long. Setae r2fine, 27 (24–27) long, setae r340 (34–39) long. Anterior margin of dorsal plate finely denticulate. Peritreme reaching setae z1. Peritremal shield narrow.  Ve nt e r: Genitoventral plate triangular, 233 (228–236) long (including genital pore), 130 (120–127) wide, finely structured, with 5 pairs of setae 38–42 (30–44) long. Two pairs of lyriform pores close to Gv1and Gv2, and a pair of small circular pores between Gv3and Gv4. Ventri-anal plate broadly triangular, finely structured, with 6 pairs of setae anterior to anal pore, a pair of adanal setae and unpaired post-anal seta. The length of these setae is as follows: Jv139 (32–38), Jv249 (42–47), Jv565 (60–74), Zv130 (25–32).   Gnathosoma: Deutosternumwith 7 rows of denticles, 5th and 6th rows widened and bent. Spermatodactyl extremely long, measuring 275 (250–332).  Legs: Legs II slightly thickened. Strong ventral spine on femur IV absent. All setae on legs setiform and smooth. Tibia III with 9 setae, tibia IV with 10 setae.  Notes.This new species belongs to the  P. belemensisspecies group. The new species differs from other species of this group, i.e.  P. belemensis Fain et al., 1977,  P. contumex OConnor et al., 1991,  P. certator OConnor et al., 1991and  P. contentiosus OConnor et al., 1991mainly in the short j5and long z5 setae, strong r3and S5setae and the lateral bulbous swelling on j1, r3and some ventral setae. The male of the new species is characterized by an extremely long spermatodactyl and the absence of ventral spine on femur IV.   Etymology.The name of the new species is derived from the generic name of its typehost,  Threnetesruckeri.