Picalgoides arbenzi Constantinescu,

Constantinescu, Ioana Cristina, Chişamera, Gabriel, Mukhim, D. Khlur B. & Adam, Costică, 2014, Two new species of feather mites (Acarina: Psoroptidia) from the Great Barbet, Psilopogon virens (Piciformes: Megalaimidae), Zootaxa 3893 (1), pp. 127-142: 133-140

publication ID

http://dx.doi.org/10.11646/zootaxa.3893.1.6

publication LSID

lsid:zoobank.org:pub:DBDEB1C8-6782-479B-B22D-B4B68F779951

persistent identifier

http://treatment.plazi.org/id/03EE87BA-FF93-D658-FF51-61549F7E6132

treatment provided by

Plazi

scientific name

Picalgoides arbenzi Constantinescu
status

sp. nov.

Picalgoides arbenzi Constantinescu  sp. nov.

( Figs. 5–10View FIGURE 5View FIGURE 6View FIGURE 7View FIGURE 8View FIGURE 9View FIGURE 10)

Description. MALE ( Fig. 5View FIGURE 5, Fig. 6View FIGURE 6; Fig. 7View FIGURE 7 A –D, ranges for 3 paratypes). Idiosoma 355 long (330–355), 230 wide (270–295); length of hysterosoma 240 (230–245). Prodorsal shield: length along midline 100 (100–105), width at posterior margin 100 (92–100), posterior margin straight, longitudinal crests divergent posteriorly and extend almost to posterior margin of the shield. Setae si and se on striated tegument, setae se separated by 90 (84–90). Length of hysterosoma 240 (230–245). Hysteronotal shield with its anterior angles rounded, length from anterior margin to bases of setae h 3 225 (210–230), width at anterior margin 145 (135–145). Setae d 2 slightly posterior to level of setae d 1, setae e 1 slightly posterior to level of hysteronotal gland openings gl. Supranal concavity present. Postero-lateral angles of opisthosoma pronounced, bearing setae f 2. Opisthosomal lobes short, with reduced anterior and posterior incision of lobe, lateral lobar digit bearing setae ps 2 short, terminal lobar digit bearing setae h 3 short triangular, ledge of terminal cleft bearing setae ps 1 well developed, distal margin of lobe between bases of setae h 3 and ps 1 concave ( Fig. 5View FIGURE 5). Terminal cleft like as inverted V. Terminal lamellae occupying lobar apices between bases of setae h 3 and ps 1 well developed, with free margin widely rounded. Measurements of opisthosomal lobes: length of anterior part of terminal cleft 24 (20–24), total length of terminal cleft 28 (26–28), length of posterior incision of lobe 20 (19–20), length of terminal lamellae 8 (8–10). Distance between idiosomal setae: c 2 –d 2 74 (64–74), d 2 – e 2 66 (64–74), e 2 –h 2 64 (54–64), h 2 –h 3 36 (32–36), f 2 –f 2 105 (92–105), h 3 –h 3 62 (52–62), ps 1 –ps 1 26 (24–26), ps 2 –ps 2 82 (72–84).

Epimerites I fused as a V, with 1 pair of short extensions at basis, epimerites II connected to epimerites III, coxal fields II closed, coxal fields III opened. Epimerites IV with large, sclerotized areas along outer and inner margins and at base of trochanters IV. Genital apparatus well developed, genital arch length 24 (24–26), width 23 (20–24), length of aedeagus 38 (30–46) ( Fig. 6View FIGURE 6). Paragenital apodemes fused like an inverted U, their posterior ends enlarged and extended to mid-level of trochanters IV. Setae 4 a at level of genital apparatus base, setae g slightly posterior to this level. Adanal apodemes fused at anterior ends into large arch encircling anal field, their inner margin with two rounded sclerotized areas. Diameter of anal suckers 21 (18–21). Distance between ventral setae: 3 a – 4 b 54 (46–54), 4 a –g 32 (28–34), g –ps 3 76 (70–78).

Tibiae I and II with pair of well-developed acute ventral spines ( Fig. 7View FIGURE 7 A, B). Tibia III with long paraxial spur 16 (14–16) at base of solenidion φ, and with poorly developed antiaxial spine ( Fig. 7View FIGURE 7 C). Tarsus IV 17 (14–17) long, with finger-like and claw-like apical processes, seta d barrel-shaped, with cap, situated between apical processes, setae e strongly reduced, situated on blunt apex of finger-like process ( Fig. 7View FIGURE 7 D).

FEMALE ( Fig. 8View FIGURE 8, Fig. 9View FIGURE 9; Fig. 10View FIGURE 10 A –D, ranges for 4 paratypes) Idiosoma 300–315 long, 185–200 wide, length of hysterosoma 200–215. Prodorsal shield: length along midline 100–105, width 92–100, general form as male except for posterior margin that has acute extension in median part and longitudinal crests reaching only to midlevel of this shield. Setae si and se on striated tegument, setae se separated by 86–88. Length of hysterosoma 200–215. Hysteronotal shield with anterior margin concave, posterior margin convex, lateral margins at level of trochanters IV concave, anterior angles rounded, posterior angles acute, greatest length 125–135, width at anterior margin 80–84, width at posterior margin 92–96 ( Fig. 8View FIGURE 8). Setae cp three times longer than setae c 3. Setae d 1 and d 2 at same transverse level, setae e 1 at level of openings gl, setae d 2 on lateral margins of hysteronotal shield, setae e 2 near posterior angles of this shield. Distance between dorsal setae: c 2 –d 2 64–74, d 2 – e 2 73–78, e 2 –h 2 54–58, d 2 –d 2 78–84, e 2 – e 2 82–90, h 2 –h 2 80–90, h 3 –h 3 60–66.

Epimerites I fused into a narrow U-shape, with pair of short posterior extensions ( Fig. 9View FIGURE 9). Epigynum semiovate, 46–52 long, 62–76 wide, lateral margins with acute extensions directed towards inner tips of epimerites III. Setae g situated at short distance from tips of epigynum. Setae h 2 and h 3 long, their bases conical, setae ps 1, ps 2 and f 2 minute, 8–12 in length. Legs I and II as in male, setae d of tarsi III and IV very long, length of tarsi III 38 –41, length of tarsi IV 40 –45.

Type Material. Male holotype (ANA 310), 3 male (ANA 312, ANA 313, ANA 314) and 4 female paratypes (ANA 311, ANA 315, ANA 316, ANA 317) from Psilopogon virens (Boddaert)  ( Piciformes  : Megalaimidae  ) [large feathers of the tail], INDIA: Meghalaya, Jaintia Hills, Shnongrim village, 25 ° 21 '12.36"N, 92 ° 31 '3.06"E; 1151 m alt; subtropical forest, 25 January 2014, coll. D.K.B. Mukhim.

Etymology. This species is named in honor of speleologist Thomas Arbenz (Matzendorf, Switzerland), one of the main organizers of the expeditions “Caving in the Abode of the Clouds - Meghalaya, India ”, for his support of our first studies on ectoparasites of birds from Jaintia Hills (Meghalaya, Northeastern India).

Differential diagnosis. Picalgoides arbenzi  sp. nov. is closest to P. capitonis Černý, 1974  from Capito niger (Müller)  ( Piciformes  : Capitonidae  ). Males of both species have epimerites I fused as a V, with a pair of short extensions at the basis, the opisthosomal lobes are short, with reduced anterior and posterior incisions, the lateral and the terminal lobar digits are short, the terminal lamellae on the inner and outer margins of the terminal lobar digit is well developed, the paragenital apodemes are fused like an inverted U, tibia III has a long paraxial spur at the base of solenidion φ, and a poorly developed antaxial spine. Picalgoides arbenzi  sp. nov. can be readily differentiated from P. capitonis  by the following features of males: the adanal apodemes are fused at the anterior ends into a large arch encircling the anal field and the terminal cleft is like an inverted V. In males of P. capitonis  the adanal apodemes are separated and the terminal cleft is like an inverted U. In females of both species, epimerites I are fused into a narrow U with a pair of the short posterior extensions, the hysteronotal shield has the anterior and lateral margins concave, the posterior margin of this shield is convex and the anterior angles rounded, setae g are situated at a short distance from the tips of epigynum, and, setae d 2 are situated on the hysteronotal shield. Picalgoides arbenzi  sp. nov. can be readily differentiated from P. capitonis  by the following female features: the hysteronotal shield has acute posterior angles, and setae d 2 are on the lateral margins of the hysteronotal shield. In females of P. c ap i t o ni s, the hysteronotal shield has the posterior angles rounded, and setae d 2 are situated at a short distance from the lateral margins of the hysteronotal shield.