Tyroborus ueckermanni, Fan, Qing-Hai & Zhang, Zhi-Qiang, 2006

Fan, Qing-Hai & Zhang, Zhi-Qiang, 2006, Revision of Tyroborus Oudemans, 1924 (Acari: Astigmata: Acaridae), Zootaxa 1152, pp. 1-43 : 27-41

publication ID	https://doi.org/ 10.5281/zenodo.172161
DOI	https://doi.org/10.5281/zenodo.5618022
persistent identifier	https://treatment.plazi.org/id/D93A87B1-FFA4-FFAB-FEED-FAEBFC24FA10
treatment provided by	Plazi
scientific name	Tyroborus ueckermanni
status	sp. nov.

Treatment

Tyroborus ueckermanni sp. nov.

( Figs. 16–25 View FIGURE 16 View FIGURE 17 View FIGURE 19 View FIGURE 20 View FIGURE 21 View FIGURE 22 View FIGURE 23 View FIGURE 24 View FIGURE 25 , Plates 5–6)

Material examined

Holotype: 1/ 1 male, SOUTH AFRICA: Dalton, New Avenue Piggery, 18 Jan 1994, J.J. de Wet, feed of pigs (ARCPPRI 94/06841319, X94/24). Paratypes: 2/ 2 females, same data as holotype.

Diagnosis

MALE. Supracoxal seta scx broadly widened at bases of pectinations, bearing 16–22 pectinations; d1 about 12.8× length of c1 and 20.1× length of d2; d2 about 0.6× length of c1; aedeagus tapering from base to tip, with one major curve, apical end almost straight and moderately long, internal diameter uniform throughout its apical part; solenidion I 1 stout, obviously widened at apex, II slightly widened at apex; ratio (a+b): c = 3.5.

FEMALE. Supracoxal seta scx bearing 16 (16–24) pectinations; spermathecal duct narrowing rapidly from copulatory opening for a distance about 0.7 (0.7–0.9)× distance between sclerites of oviducts, forming a neck and then gradually widening to base of spermathecal sac over a distance about 2.2 (2.2–2.4)× distance between sclerites of oviducts, base of spermathecal sac nearly flat; solenidia I 1 and II stout, cylindrical, not obviouly widened at apex.

Description

MALE ( Fig. 16–20 View FIGURE 16 View FIGURE 17 View FIGURE 19 View FIGURE 20 , Plate 5)

Idiosoma. 318 long, 208 wide. Chelicera 81 long, cheliceral seta cha appically branched, 5 long, subcapitular setae m 33, palpal supracoxal seta elcp apically bifurcate, 18 long, dorsal palptibial seta 21, lateral palptibial seta 15, dorsal palptarsal seta 12, palptarsal solenidion 4.

Dorsum. Prodorsal shield nearly pentagonal in shape and obviously punctate, 71 long, 88 wide between veve. Eyespots not observed. Grandjean’s organ fingerlike, 10 long, its basal lobe with 4–6 obvious spiniform teeth; supracoxal seta scx broadly widened at bases of pectinations, 36 long, bearing 16–22 pectinations. Dorsal idiosomal setae sparsely pectinated. Ratios: vi: ve = 1.8, sci: sce = 1.2, scisci: scisce = 1.3. Lengths of setae: vi 67, ve 38, sci 133, sce 110; distances: vivi 8, vive 37, scisci 32, scisce 25. Hysterosomal setae d1 about 12.8× length of c1 and 20.1× length of d2; d2 about 0.6× length of c1; lengths of setae: c1 11, c2 209, c p 163, c3 18, d1 positioned close to c1, 141 long, d2 7, e1 251, e2 201, f2 313, h1 278, h2 292, h3 288; distances: c1c1 81, c1d1 25, d1d1 12, d2gla 42, d1 e 1 85, e1 e 1 53.

Venter. Coxal plates I not reaching posterior extremity of prosternal apodeme; coxal plates II very narrow, about 1/3 length of lateral sclerite. Setae 1a 25; 3a 18; 3b 27; g 22, 4a 27. Aedeagus tapering from base to tip, with one major curve, 31 long, apical end almost straight and moderately long, internal diameter uniform throughout its apical part; lateral arms supporting aedeagus turning inward (?). Anal slit 55 long, distance between anterior rim of anal slit and posterior margin of aedeagus 20. Anal suckers about 26 in diameter; anal discs 4 in diameter, distance between right and left discs 30. Pseudanal setae ps1 about 119, ps2 37, ps3 15; ps1ps1 20, ps2ps2 40.

Leg I. 163 long; femur I 46, vF simple, 33 long; genu I 32, ' 23, " 18, I ': " = 1.3, cG 32, mG 27; tibia I 18, 91, gT 24, hT 20; length of tarsus I (excluding claw) about 2.0× width, 41 long, 21 wide, 1 stout, obviously widened at apex, 14 long, 3, 2 6.5, 3 22, distance between aa and 1 about 5, aa 17 long, ba 23, wa 33, ra 25, la 16, d 36, e moderately thick, 8, f 16, s stout, 7, u and v stout, 7, p and q thin, 8, claw 16.

Leg II. 152 long; femur II 45, vF 43; genu II 30, 14, cG pectinate, 29, mG pectinate, 28; tibia II 22, 89, gT pectinate, 20, hT pectinate, 24; length of tarsus II (excluding claw) about 2.0× width, 36 long, 18 wide, stout, slightly widened at apex, 16 long, ba 17, wa 23, ra 28, la 14, d 30, e 8, f 15, s stout, 7, u and v stout, 7, p and q thin, 8, claw 14.

Leg III. 143 long; femur III 37; genu III 24, 9, nG 32; tibia III 22, 99, kT 26; length of tarsus III (excluding claw) about 2.6× width, tarsus III 41 long, 16 wide, w 28, r 25, d 25, e 7, f 23, s stout, 6, u and v stout, 6, p and q thin, 6, claw 15.

Leg IV. 161 long; femur 38, wF 30; genu IV 32; tibia IV 27, 63, kT 24; length of tarsus IV (excluding claw) about 2.8× width, tarsus IV 44 long, 16 wide, w and r situated at level between suckers, w 32 long, r 21 long, distance between basal rim of tarsus IV and proximal sucker d 15, between d and e 20, between e and f 10, ratio (a+b): c = 3.5, f 23, s stout, 6, u and v stout, 6, p and q thin, 6, claw 14.

FEMALE ( Fig. 21–25 View FIGURE 21 View FIGURE 22 View FIGURE 23 View FIGURE 24 View FIGURE 25 , Plate 6)

Idiosoma. 427 (427–446) long, 303 (303–318) wide. Chelicera 116 (111–116) long, cheliceral seta cha apically branched, 8 long, subcapitular setae m 47 (47–50), palpal supracoxal seta elcp apically bifurcate, 27 long, dorsal palptibial seta 28 (28–29), lateral palptibial seta 24 (24–26), dorsal palptarsal seta 19 (17–19), palptarsal solenidion 5.

Dorsum. Prodorsal shield nearly pentagonal in shape and obviously punctate, 100 (100–101) long, 134 (130–134) wide between veve. Eyespots not observed. Grandjean’s organ fingershaped, 14 long, basally with 3–6 long branches; supracoxal seta scx medially expanded at bases of pectinations, tapered from base to tip, 47 (47–48) long, with Tyroborus ueckermanni (male). A, ventral view of chelicera; B, ventral view

of subcapitulum; C, supracoxal seta; D, prodorsal shield; E, lateral view of aedeagus.

16–24 spiniform pectinations. Dorsal idiosomal setae sparsely pectinated; ratios: vi: ve = 1.8 (1.8–2.4), sci: sce = 1.4 (1.3–1.4), scisci: scisce = 1.4 (1.3–1.4). Lengths of setae: vi 100 (100–106), ve 55 (44–55), sci 193 (183–193), sce 138 (138–143); distances: vivi 13 (12–13), vive 62 (61–62), scisci 53 (51–53), scisce 37 (37–38). Hysterosomal setae d1 about 9.6 (9.5–9.6)× length of c1 and 9.6 (9.5–11.0)× length of d2; d2 about 1.0 (0.9–1.0)× length of c1; lengths of setae: c1 17 (17–20), c2 174 (174–208), c p 153 (153–154), c3 24 (24–30), d1 positioned close to c1, 163 (163–189) long, d2 17, e1 239 (239–272), e2 224 (224–232), f2 324 (324–334), h1 302 (302–316), h2 325 (311–325), h3 244 (244–247); distances: c1c1 138 (138–146), c1d1 46 (46–51), d1d1 45 (45–55), d2gla 45 (45–46), d1e1 125 (120–125), e1e1 117 (117–121).

PLATE 5. Tyroborus ueckermanni sp. nov. (male). A, supracoxal seta; B, aedeagus; C, tarsus I; D, tarsus II.

Venter. Coxal plates I not reaching posterior extremity of prosternal apodeme; coxal plates II narrow, about 1/3 length of lateral sclerite. Setae 1a 40 (40–51); 3a 24 (24–27); 3b 37 (37–38); g 32 (32–33), 4a 33 (33–35). Adanal setae ad1 20 (20–22), ad2 23 (19–23), ad3 19 (19–20); pseudanal setae ps1 208 (147–208), ps2 128 (128–146), ps1 32 (32–39); spermathecal duct narrowing rapidly from copulatory opening for a distance about 0.7 (0.7–0.9)× distance between sclerites of oviducts, forming a neck and then gradually widening to base of spermathecal sac over a distance about 2.2 (2.2–2.4)× distance between sclerites of oviducts, base of spermathecal sac nearly flat; spermathecal duct 40 (40–42) long, distance between sclerites of oviducts 15 (15–17).

Leg I. 188 (188–204) long; femur I 51 (51–58), vF simple, 48 (48–53) long; genu I 35 (35–38), ' 26 (25–26), " 23, I ': " = 1.1, cG 41 (41–42), mG 35 (35–30); tibia I 30 (30–33), 91 (89–90), gT 24 (24–29), hT 30; length of tarsus I (excluding claw) about 1.7 (1.7–2.1)× width, 46 (46–53) long, 27 (25–27) wide, 1 stout, cylindrical, not obviously widened at apex, 17 long, 3 (3–4), 2 8, 3 25 (25–27), distance between aa and 1 about 5 (5–6), aa 22 (22–25) long, ba 26 (26–29), wa 41 (41–42), ra 30 (30–33), la 21 (20–21), d 41 (38–41), e 11, f 19 (19–24), s stout, 9, u and v stout, 9, p and q thin, 12 (11–12), claw 22 (20–22).

PLATE 6. Tyroborus ueckermanni sp. nov. (female). A, supracoxal seta; B, anus, copulatory opening and spermatheca; C, tarsus I; D, tarsus II.

Leg II. 170 (170–200 long; femur II 51 (51–60), vF 52 (52–61); genu II 32 (32–38),

18 (18–21), cG pectinate, 36 (36–39), mG pectinate, 31 (31–33); tibia II 26 (26–30), 104 (104–105), gT pectinate, 22 (22–25), hT pectinate, 29 (29–31); length of tarsus II (excluding claw) about 1.6 (1.6–2.0)× width, 40 (40–49) long, 25 wide, stout, cylindrical, not widened at apex, 17 (17–18) long, ba 22 (22–23), wa 33 (32–33), ra 30 (30–36), la 21 (21–24), d 36 (36–42), e 8 (8–12), f 17 (17–19), s stout, 10, u and v stout, 10, p and q thin, 7 (7–8), claw 18 (18–19).

Leg III. 157 (157–168) long; femur III 41 (41–43); genu III 28 (28–30), 13, nG 42 (42–44); tibia III 28 (28–30), 95 (93–95), kT pectinate, 28 (28–33); length of tarsus III (excluding claw) about 2.4 (2.4–2.8)× width, tarsus III 43 (43–51) long, 18 wide, w 32 (32–40), r 23 (23–32), d 23 (22–23), e 8 (7–8), f 21 (10–21), s stout, 8, u and v stout, 8, p and q thin, 8, claw 18 (18–19).

Leg IV. 185 (185–220) long; femur 43 (43–50), wF 33 (33–43); genu IV 33 (33–42); tibia IV 31 (31–35), 78 (78–88), kT 25 (21–25); length of tarsus IV (excluding claw) about 2.9 (2.9–3.6)× width, tarsus IV 53 (53–65) long, 16 (16–18) wide, w 36 (33–36) long, r 31 (28–31) long, d 28 (27–28), e 7 (7–9), f 24 (24–25), s stout, 8 (7–8), u and v stout, 8 (7–8), p and q thin, 8 (7–8), claw 18.

Habitats and distribution

This species was found in feed of pigs in a piggery at Dalton in South Africa.

Remarks

Tyroborus ueckermanni sp. nov. is similar to T. miripes (AthiasHenriot) in having the proral setae on tarsi and ' longer than ", but can be distinguished from the latter by scx having fewer pectinations in both sexes and 1 on tarsus I being obviously widened at the apex in male.

Etymology

This species is named in honor of Dr. Eddie A. Ueckermann of the ARCPlant Protection Research Institute of South Africa, who has contributed a great deal to our knowledge of acarology, and sent us African specimens.