Pentamerismus hicklingorum Seeman and Beard,

Beard, Jennifer J., Seeman, Owen D. & Bauchan, Gary R., 2014, Tenuipalpidae (Acari: Trombidiformes) from Casuarinaceae (Fagales), Zootaxa 3778 (1), pp. 1-157: 104-111

publication ID

http://dx.doi.org/10.11646/zootaxa.3778.1.1

publication LSID

lsid:zoobank.org:pub:20D5DCD9-17F5-4863-B627-42B7C349B9A7

persistent identifier

http://treatment.plazi.org/id/194C87D0-FF81-FFB4-F387-FD0FFD72F92A

treatment provided by

Plazi

scientific name

Pentamerismus hicklingorum Seeman and Beard
status

sp. nov.

Pentamerismus hicklingorum Seeman and Beard  sp. nov.

( Figs 88–94View FIGURE 88View FIGURE 89View FIGURE 90View FIGURE 91View FIGURE 92View FIGURE 93View FIGURE 94)

Type material examined. Holotype female ex. Coastal She-Oak, Casuarina equisetifolia  ( Casuarinaceae  ), AUSTRALIA: Southeast Queensland, Beachmere, Bayside Drive, 27 ° 05′ 52 ′′ S, 153 °05′ 21 ′′ E, 25 June 2010, coll. O.D. Seeman (QM). Paratypes. 8 females, 3 males, 2 deutonymphs, 1 protonymph, 4 larvae, same data as holotype (QM, ANIC).

Diagnosis. Dorsal opisthosomal setae f 2 present. Palp setal formula 0-0- 0-1 - 3 (1), with palp tibial setae l′′PTi absent, l’PTi present. Anterior margin of prodorsal shield notched, forming 1 pair of short rounded lobes. Dorsal shields coarsely rugose with broadly rounded folds and weak reticulation; dorsal setae broadly lanceolate, barbed; lateral margins of opisthosoma coarsely papillate. Setae ag lanceolate, barbed; setae g 1–2 fine, barbed; setae ps 1–3 fine, ps 1 barbed slightly thicker than ps 2–3, ps 2–3 fine, smooth. Seta 1 c absent. Setae d on femora and genua I –II lanceolate; seta ev ′ on femora III fine, smooth; setae v ′, v′′ on tibiae III fine, smooth.

FEMALE (n = 9). Dorsum. ( Figs 88View FIGURE 88 a, 94) Body measurements: distance between setae v 2 -h 1 230–270 [240], sc 2 -sc 2 105–110 [105]; other measurements: v 2 -v 2 46 –51 [51], sc 1 -sc 1 79–87 [83], c 1 -c 1 51–55 [54], c 2 -c 2 115– 120 [115], c 3 -c 3 155–160 [155], d 1 -d 1 37–44 [37], d 2 -d 2 97–100 [98], d 3 -d 3 140–145 [140], e 1 - e 1 35–41 [36], e 2 -e 2 135–140 [135], e 3 -e 3 120–130 [125], f 2 -f 2 105–120 [110], f 3 -f 3 85–100 [87], h 1 -h 1 23–31 [24], h 2 -h 2 47– 60 [56]. Anterior margin of prodorsal shield with 1 pair of small rounded lobes, forming short medial notch (internal depth 6–8). Dorsal shields coarsely rugose with broadly rounded folds and weak reticulation ( Fig. 94View FIGURE 94). Lateral cuticle surrounding shields coarsely papillate; cuticle between shields rugose. All dorsal setae barbed, lanceolate. Setal lengths: v 2 24–30 [25], sc 1 25–28 [25], sc 2 28–31 [31], c 1 25–31 [28], c 2 20–29 [25], c 3 22–26 [26], d 1 19–26 [24], d 2 22–24 [23], d 3 25–27 [27], e 1 18 –22 [18], e 2 20 –25 [23], e 3 18 –21 [20], f 2 18–20 [20], f 3 17–22 [18], h 1 17–19 [19], h 2 17–19 [19]. Palps. ( Fig. 88View FIGURE 88 b) Setal formula 0, 0, 0, 1, 3 (1 s+ 2 e). Tibial setae, dorsal 9–10 [10] long; tarsal eupathidia 5–6 [6], 6–8 [7] long; solenidion 6 [6] long. Venter. ( Fig. 89View FIGURE 89 a) Cuticle with transverse striae, becoming longitudinal just anterior to setae ag, becoming coarse around genital area. Circular thickening present in metapodal region, ca. 25 diameter, weakly rugose. Setae g 1 inserted in more-or-less transverse line with g 2, g 2 slightly anterior to g 1. Genital shield mostly smooth, margins irregular, 30–33 [33] long, 41–44 [42] wide; anal setae ps 1–3 inserted in longitudinal row on anal plates. Coxal setae fine, except 2 c barbed; setae ag 1 lanceolate, barbed; g 1–2 fine, barbed; setae ps 1–3 fine; ps 1 barbed slightly thicker than ps 2–3; ps 2–3 smooth. Setal lengths: 1a 51 – 58 [54], 1 b 25–30 [26], 2 b 21–23 [21], 2 c 17–18 [18], 3a 40 – 58 [45], 3 b 13–15 [15], 4a 40 – 45 [45], 4 b 11–15 [11], ag 1 16–21 [21], g 1 22–24 [22], g 2 19–22 [19], ps 1 13–15 [15], ps 2 13–14 [14], ps 3 7–8 [7]. Spermatheca. ( Fig. 89View FIGURE 89 b) Spermathecal tube long, narrow, convoluted, <1 wide, ca. 130 long, terminating in membranous sac. Spermatheca vesicle visible in 2 specimens: 1 specimen with round spermatheca, ca. 3 diameter; second specimen with elongate spermatheca 6 long, 1–2 wide. Genital opening between anal valves and posterior margin of genital shield. Legs. ( Fig. 90View FIGURE 90) Setal formula for legs I –IV (coxae to tarsi) 1 - 1-3 - 3-4 - 9 (1), 2 - 1-3 - 3-4 - 9 (1), 1-2 - 2 - 1-3 - 5, 1 - 1 - 1 - 0-3 - 5. Tarsi I and II each with 1 antiaxial solenidion ω" (ta I 13–14 [14] long, ta II 13 [13] long) and 2 eupathidia pζ'-pζ" (6–7 [6–7] long). Leg setation as in Table 1 except coxae I without 1 c. Setae v' added to tr IV.

MALE (n = 3). Dorsum. ( Fig. 91View FIGURE 91) Body measurements: distance between setae v 2 -h 1 190–200, sc 2 -sc 2 86–91; other measurements: v 2 -v 2 34 –35, sc 1 -sc 1 68–69, c 1 -c 1 32–33, c 2 -c 2 90–92, c 3 -c 3 115–125, d 1 -d 1 22–28, d 2 -d 2 73–81, d 3 -d 3 100–105, e 1 - e 1 34–40, e 2 - e 2 90–92, e 3 - e 3 91–96, f 2 -f 2 80–83, f 3 -f 3 63–65, h 1 -h 1 16–20, h 2 -h 2 41– 45. Anterior margin of prodorsum with pair of small lobes forming a short medial notch (internal depth 5–6). Prodorsal, mesonotal and pygidial shields with sculpture and dorsal setae similar to female. Medial soft cuticle striated, lateral cuticle reticulated to striated. Setal lengths: v 2 21–22, sc 1 17, sc 2 21, c 1 18–20, c 2 17–22, c 3 16– 17, d 1 13–15, d 2 13–15, d 3 14–16, e 1 13 –15, e 2 15 –16, e 3 15 –16, f 2 15, f 3 14–16, h 1 13–15, h 2 15–16. Palps. Palps similar to female. Tibial seta 8–10 long; tarsal eupathidia 5–6, 7 long; solenidion 7 long. Venter. ( Fig. 92View FIGURE 92 a) Striae entirely transverse, becoming coarse behind cx IV. Posterior opisthosoma with 2 irregular, poorly defined, striated subcircular plates, ca. 25–35 in diameter; g 1–2, ps 1–3 on weakly sclerotised anal valves. Coxal setae fine, except 2 c barbed. Seta ag 1 lanceolate, barbed; g 1 barbed; g 2, ps 2, ps 3 smooth; ps 1 spine-like, thickened. Setal lengths: 1a 38 – 50, 1 b 22–26, 2 b 15, 2 c 15–17, 3 a 37–45, 3 b 11–15, 4 a 40–45, 4 b 15–25, ag 1 13–16, g 1 6–7, g 2 14–15, ps 1 8–14, ps 2 7–10, ps 3 6–8. Aedeagus. ( Fig. 92View FIGURE 92 b) Narrow, sclerotised, tapering to a point, 65–68 long; curved in 2 preparations. Membranous duct runs from inside aedeagus. Legs. Setal formula same as female. Tarsi I and II each with 1 antiaxial solenidion ω" (15–17 long) and 2 eupathidia pζ'-pζ" (6–7 long). Solenidia slightly thicker and longer than in female.

DEUTONYMPH (n = 2). Dorsum. Body measurements: distance between setae v 2 -h 1 185–195, sc 2 -sc 2 90– 91; other measurements: v 2 -v 2 30, sc 1 -sc 1 73–75, c 1 -c 1 28–30, c 2 -c 2 88–96, c 3 -c 3 122–131, d 1 -d 1 23–25, d 2 -d 2 81, d 3 -d 3 110–114, e 1 - e 1 27–28, e 2 -e 2 103–105, e 3 - e 3 95–102, f 2 -f 2 79–90, f 3 -f 3 70–75, h 1 -h 1 21–22, h 2 -h 2 43– 48. Anterior margin of prodorsum without medial lobes or notch. Prodorsal shield poorly defined, with fine oblique-longitudinal striations. Transverse striae between setal row C to midway between rows D and E; then opisthosomal shield region with irregular polygons arranged in oblique to longitudinal pattern. Setae v 2, sc 1 thickened slightly, barbed; setae sc 2 narrowly lanceolate; opisthosomal setae lanceolate. Setal lengths: v 2 10–16, sc 1 15–16, sc 2 15–18, c 1 16–17, c 2 16–21, c 3 21–23, d 1 13–17, d 2 19–20, d 3 27, e 1 16 –19, e 2 23 –27, e 3 20 –22, f 2 21–25, f 3 21–22, h 1 16–19, h 2 16–21. Palps. Palps similar to adult. Tibial seta 7 long; tarsal eupathidia 3, 5 long; solenidion 3 long. Venter. Striation similar to female; anal setae ps 1–3 on weakly defined anal plates. Coxal setae fine, except 2 c barbed; setae ag 1 and ps 1 with few or no barbs; other setae smooth. Setal lengths: 1a 33 – 35, 1 b 14– 15, 2 b 10–11, 2 c 13–14, 3 a 25–40, 3 b 8–12, 4 a 19–29, 4 b 7–10, ag 1 13–14, g 1 11–12, ps 1 6, ps 2 6, ps 3 6. Legs. Setal formula for legs I –IV (coxae to tarsi) 1 - 1-3 - 3-4 - 9 (1), 2 - 1-3 - 3-4 - 9 (1), 1-2 - 2 - 1-3 - 5, 1 - 0-1 - 0-3 - 5. Tarsi I and II each with 1 antiaxial solenidion ω" (ta I 6–8 long, ta II 6–7 long) and 2 eupathidia pζ'-pζ" (about 5 long). Leg setation as in adult except: tr IV without seta v ′. Setae v' added to tr I –III.

PROTONYMPH (n = 1). Dorsum. Body measurements: distance between setae v 2 -h 1 145, sc 2 -sc 2 80; other measurements: v 2 -v 2 27, sc 1 -sc 1 66, c 1 -c 1 20, c 2 -c 2 83, c 3 -c 3 110, d 1 -d 1 19, d 2 -d 2 71, d 3 -d 3 92, e 1 - e 1 18, e 2 - e 2 78, e 3 - e 3 70, f 2 -f 2 48, f 3 -f 3 45, h 1 missing on left hand side, h 2 -h 2 23. Anterior margin of prodorsum without medial notch. Dorsal cuticle similar to deutonymph, except opisthosoma with coarse irregular striae only. Setae similar in length to those of adult; narrowly lanceolate, barbed. Setal lengths: v 2 19, sc 1 14, sc 2 15, c 1 19, c 2 19, c 3 20, d 1 17, d 2 23, d 3 23, e 1 23, e 2 25, e 3 20, f 2 24, f 3 23, h 1 23, h 2 18. Palps. Palps similar to adult. Tibial seta 6 long; tarsal eupathidia 3, 5 long; solenidion 3 long. Venter. Cuticle same as deutonymph. Anal setae ps 1–3 on weakly defined anal plates. Coxal and anal setae fine, except 2 a with few barbs. Setal lengths: 1a 33, 1 b 8, 2 b 10, 3a 35, 3 b 10, ag 1 9, ps 1 5, ps 2 5, ps 3 5. Legs. Setal formula for legs I –IV (coxae to tarsi) 1 - 0-3 - 1-4 - 9 (1), 1 - 0-3 - 1- 4 - 9 (1), 1 - 1-2 - 1-3 - 5, 0- 0-1 - 0-3 - 3. Tarsi I and II each with 1 antiaxial solenidion ω" (4 long) and 2 eupathidia pζ'-pζ" (3-4 long). Leg setation as in deutonymph except: seta 2 c absent; seta 4 b absent; tr I –III without seta v ′; ge I –II without seta d, l′′; ta IV without setae tc ′, tc′′. Setae l' added to tr III.

LARVA (n = 4). Dorsum. ( Fig. 93View FIGURE 93) Body measurements: distance between setae v 2 -h 1 110–125, sc 2 -sc 2 56– 59; other measurements: v 2 -v 2 23–27, sc 1 -sc 1 48–51, c 1 -c 1 14–17, c 2 -c 2 57–63, c 3 -c 3 81–87, d 1 -d 1 9–11, d 2 -d 2 51–58, d 3 -d 3 68–74, e 1 - e 1 7, e 2 - e 2 52–57, e 3 - e 3 41–46, f 2 -f 2 30–35, f 3 -f 3 22–28, h 1 -h 1 9–10, h 2 -h 2 13–14.

Anterior margin of prodorsum without medial notch. Prodorsal shield absent, with longitudinal striations. Opisthosomal shield absent; coarse, irregular transverse striae, becoming oblique posteriorly. Setae similar in length to those of adult; setae narrowly lanceolate to thickened, barbed; setae d 1 and e 1 broadest; setae h 2 narrowest. Setal lengths: v 2 14–18, sc 1 12–15, sc 2 14–16, c 1 15–19, c 2 15, c 3 11–14, d 1 20, d 2 14–16, d 3 13–16, e 1 18 –22, e 2 14 –17, e 3 15 –16, f 2 15, f 3 15–16, h 1 14–16, h 2 16–18. Palps. ( Fig. 93View FIGURE 93) Palps similar to adult. Tibial seta 6–7 long; tarsal eupathidia both 5 long; solenidion 3 long. Venter. Cuticle with transverse striae to setae 3 a, longitudinal to anal area, slightly coarser around anal area. Anal setae ps 1–3 on weakly defined anal plates. Coxal setae fine. Setal lengths: 1a 28 – 37, 1 b 13–19, 3 a 32–40, ps 1 4–5, ps 2 4–5, ps 3 4–5. Legs. ( Fig. 93View FIGURE 93) Setal formula for legs I –III (coxae to tarsi) 1 - 0-3 - 1-4 - 7 (1), 0- 0-3 - 1-4 - 7 (1), 0- 0-2 - 1-3 - 3. Tarsi I and II each with 1 antiaxial solenidion ω" (4 long) and 2 eupathidia pζ'-pζ" (4–5 long). Leg setation as in protonymph except: seta 2 b absent; seta 3 b absent; tr I –III nude; ta I –III without seta tc ′, tc′′.

Etymology. It is with great pleasure that the manuscript’s second author names this species for his mother’s family, the Hicklings.

Remarks. Pentamerismus hicklingorum  is similar to P. w a rd o, but can be separated by having one seta on the palp tibia (two setae on the palp tibia of P. w a rd o) and the dorsal cuticle having broadly rounded folds (weakly reticulate on P. w a rd o).

Individual adults were found in close association with their cast nymphal skins ( Fig. 94View FIGURE 94), and often still within the deutonymphal and/or protonymphal skins.

ANIC

Australian National Insect Collection