Pentamerismus wardo 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: 97-104

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-FF86-FFBD-F387-FA32FE66FDCF

treatment provided by

Plazi

scientific name

Pentamerismus wardo Seeman and Beard
status

sp. nov.

Pentamerismus wardo Seeman and Beard  sp. nov.

( Figs 82–87View FIGURE 82View FIGURE 83View FIGURE 84View FIGURE 85View FIGURE 86View FIGURE 87)

Type material examined. Holotype female ex. Allocasuarina scleroclada  ( Casuarinaceae  ), AUSTRALIA: Western Australia, approx. 3 km N Coomberdale, along Moora-Watheroo Road, 30 ° 24 ’ 17 ” S 116 °02’ 29 ” E, 15 April 2009, coll. J.J. Beard ( WAM) ( BRI voucher, BRI [ AQ 814925View Materials]). Paratypes. 6 females, 3 pharate females, 2 males, 2 pharate males, 4 larvae, same data as holotype ( WAM, QM, ANIC, USNM).

Diagnosis. Dorsal opisthosomal setae f 2 present. Palp setal formula 0-0- 0-2 - 3 (1), with palp tibial setae l’PTi and l′′PTi both present. Anterior margin of prodorsal shield with short notch. Dorsal shields with irregular weakly reticulate to rugose mosaic sculpturing; dorsal setae broadly lanceolate, barbed; lateral margins of opisthosoma with transverse to oblique folds or striae. Posterior ventral setae ag fine, barbed; setae g 1–2 fine, barbed; setae ps 1– 3 fine, ps 1 slightly thicker than ps 2–3, ps 1–2 barbed, ps 3 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 to weakly barbed.

FEMALE (n = 7). Dorsum. ( Fig. 82View FIGURE 82 a) Body measurements: distance between setae v 2 -h 1 220–260 [260], sc 2 - sc 2 105–120 [110]; other measurements: v 2 -v 2 40 –46 [45], sc 1 -sc 1 77–86 [86], c 1 -c 1 49–72 [51], c 2 -c 2 110–135 [110], c 3 -c 3 160–180 [160], d 1 -d 1 33–38 [38], d 2 -d 2 90–115 [98], d 3 -d 3 130–150 [135], e 1 - e 1 36–43 [41], e 2 -e 2 120–140 [130], e 3 -e 3 110–125 [115], f 2 -f 2 96–110 [100], f 3 -f 3 77–89 [80], h 1 -h 1 24–29 [24], h 2 -h 2 54–63 [54].

Anterior margin of prodorsal shield with 1 pair of small lobes forming short medial notch (internal depth 9–12). Prodorsal shield with irregular weakly reticulate to rugose mosaic of polygonal cells medially, with cells elongate anteriorly and laterally. Opisthosomal shield with similar pattern to prodorsal shield, except pattern less complete, especially laterally. Lateral cuticle surrounding prodorsal shield smooth to weakly rugose medially, with some weak folds posteriorly; lateral cuticle surrounding opisthosoma with transverse to oblique folds and striae. All dorsal setae barbed, lanceolate, becoming broader posteriorly. Setal lengths: v 2 22–27 [22], sc 1 24–27 [24], sc 2 26–31 [26], c 1 22–26 [22], c 2 25–26 [25], c 3 20–23 [20], d 1 16–17 [not measurable], d 2 16–20 [16], d 3 18–20 [18], e 1 15 –17 [not measurable], e 2 17 –19 [17], e 3 19 –21 [19], f 2 17–19 [17], f 3 17–19 [17], h 1 17–18 [17], h 2 18– 20 [18]. Palps. ( Fig. 82View FIGURE 82 b) Setal formula 0, 0, 0, 2, 3 (1 s+ 2 e). Tibial setae, dorsal 5–6 [6] long, ventral 7–9 [7] long; tarsal eupathidia 3–4 [3] long, 5 [5] long; solenidion 5–6 [5] long. Venter. ( Fig. 83View FIGURE 83) 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, rugose. Setae g 1 inserted in more-or-less transverse line with g 2, g 2 slightly anterior to g 1. Genital shield punctate, margins irregular, 30–32 [32] long, 40–45 [43] wide; anal setae ps 1–3 inserted in longitudinal row on anal plates. Coxal setae fine, except 2 c thickened, barbed; setae ag 1 fine, barbed; g 1–2, ps 1–2 fine, barbed; ps 3 fine, smooth. Setal lengths: 1a 47 – 52 [47], 1 b 18–31 [17], 2 b 20–25 [20], 2 c 16–20 [17], 3a 49 – 58 [49], 3 b 15–19 [19], 4a 46 – 55 [46], 4 b 11–17 [15], ag 1 12–20 [19], g 1 18–24 [20], g 2 15–22 [15], ps 1 13–15 [13], ps 2 13–14 [13], ps 3 7–8 [17]. Spermatheca. Spermathecal tube long, narrow, convoluted, <1 wide,> 70 long. Spermatheca vesicle obscured in all specimens. Genital opening between anal valves and posterior margin of genital shield. Legs. ( Fig. 84View FIGURE 84) 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" (9–10 [9] long) and 2 eupathidia pζ'-pζ" (6–7 [7] long). Leg setation as in Table 1 except coxae I without 1 c.

MALE (n = 2). Dorsum. ( Fig. 85View FIGURE 85) Body measurements: distance between setae v 2 -h 1 185–190, sc 2 -sc 2 85–88; other measurements: v 2 -v 2 26–30, sc 1 -sc 1 63–67, c 1 -c 1 39–41, c 2 -c 2 89–93, c 3 -c 3 120–125, d 1 -d 1 20–22, d 2 -d 2 70–74, d 3 -d 3 93–97, e 1 - e 1 29–34, e 2 - e 2 89–93, e 3 - e 3 17, f 2 -f 2 76–77, f 3 -f 3 61–63, h 1 -h 1 13–14, h 2 -h 2 15. Anterior margin of prodorsum with pair of small lobes forming a short medial notch (internal depth 3–4). Prodorsal, mesonotal and pygidial shields with sculpture and dorsal setae similar to female. Medial soft cuticle striated, lateral cuticle smooth, becoming festo 1 d posteriorly. Setal lengths: v 2 20–22, sc 1 21, sc 2 21–22, c 1 18, c 2 19–21, c 3 17, d 1 11–13, d 2 15, d 3 15–16, e 1 12, e 2 16, e 3 17, f 2 16, f 3 16–17, h 1 13–14, h 2 15. Palps. ( Fig. 85View FIGURE 85) Palps similar to female. Tibial setae, dorsal 6 long, ventral 7–8 long; tarsal eupathidia 3, 5–6 long; solenidion 4–5 long. Venter. ( Fig. 86View FIGURE 86) Striae entirely transverse, becoming coarse behind cx IV. Posterior opisthosoma with 2 irregular, poorly defined, striated subcircular plates, ca. 30 in diameter; g 1–2, ps 1–3 on weakly sclerotised anal valves; ps 1 modified, thickened. Coxal setae fine, except 2 c thickened, barbed. Seta ag 1 narrowly lanceolate, barbed; g 1 lanceolate; g 2, ps 2, ps 3 smooth; ps 1 spine-like, thickened. Setal lengths: 1a 38 – 48, 1 b 26, 2 b 26, 2 c 13, 3a 30 – 37, 3 b 18–19, 4 a 47, 4 b 20, ag 1 13, g 1 11, g 2 11–13, ps 1 11–14, ps 2 7, ps 3 6–7. Aedeagus. Narrow, sclerotised, tapering to a point, 66 long, curved. Membranous duct runs from inside aedeagus. Legs. ( Fig. 85View FIGURE 85) Setal formula same as female. Tarsi I and II each with 1 antiaxial solenidion ω" (9–10 long) and 2 eupathidia pζ'-pζ" (about 6 long).

LARVA (n = 2). Dorsum. ( Fig. 87View FIGURE 87) Body measurements: distance between setae v 2 -h 1 130–140, sc 2 -sc 2 54– 59; other measurements: v 2 -v 2 20–22, sc 1 -sc 1 44–48, c 1 -c 1 17–20, c 2 -c 2 61, c 3 -c 3 87–89, d 1 -d 1 13, d 2 -d 2 51–52, d 3 -d 3 72–76, e 1 - e 1 8–10, e 2 - e 2 56–61, e 3 - e 3 50–53, f 2 -f 2 36–38, f 3 -f 3 24–31, h 1 -h 1 4–6, h 2 -h 2 11–16. Anterior margin of prodorsum without medial notch. Prodorsal shield 54–57 long, 64 wide, defined by numerous longitudinal striations. Opisthosomal shield absent; coarse, irregular transverse striae, becoming obsolete between d 1 -e 1. Setae similar in length to those of adult; setae narrowly lanceolate to thickened, barbed; setae d 1 and e 1 broadest; setae v 2, sc 1, sc 2, h 2 narrowest. Setal lengths: v 2 14–19, sc 1 13–15, sc 2 14–17, c 1 19–20, c 2 14, c 3 14– 15, d 1 19–20, d 2 17–18, d 3 17–20, e 1 21 –22, e 2 20 –21, e 3 20 –23, f 2 20, f 3 24–26, h 1 24–25, h 2 20. Palps. ( Fig. 87View FIGURE 87) Palps similar to adult. Tibial setae, dorsal 4 long, ventral 5 long; tarsal eupathidia 3, 4 long; solenidion 3 long. Vent er. Cuticle with transverse striae to setae 3 a, oblique posterior to 3 a, transverse to midway between 3 a and ps 3, then longitudinal anal area, slightly coarser around anal area. Anal setae ps 1–3 on weakly defined anal plates. Coxal setae fine. Setal lengths: 1a 25 – 30, 1 b 15, 3a 35 – 38, ps 1 3–4, ps 2 4–5, ps 3 4–5. Legs. ( Fig. 87View FIGURE 87) 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" (ta I 5 long, ta II 4 long) and 2 eupathidia pζ'-pζ" (about 4 long). Leg setation as in Table 1.

Etymology. The specific name, wardo  , is an Australian indigenous word meaning “a little bird” referring specifically to the Willy Wagtail ( Rhipidura leucophrys Latham  ( Rhipiduridae  )), and is the source of the town name Watheroo, near which this mite was collected.

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

Individuals were found buried in the thick pubescence present on the tips of the needle-like stems and branchlets of the host.

WAM

Western Australian Museum

BRI

Queensland Herbarium

ANIC

Australian National Insect Collection

USNM

Smithsonian Institution, National Museum of Natural History