Magdalenapalpus caperatus Beard and Seeman,

Beard, Jennifer J., Seeman, Owen D. & Bauchan, Gary R., 2014, Tenuipalpidae (Acari: Trombidiformes) from Casuarinaceae (Fagales), Zootaxa 3778 (1), pp. 1-157: 56-62

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-FFD1-FFE7-F387-FEEAFBD9FD93

treatment provided by

Plazi

scientific name

Magdalenapalpus caperatus Beard and Seeman
status

sp. nov.

Magdalenapalpus caperatus Beard and Seeman  sp. nov.

( Figs 42–47View FIGURE 42View FIGURE 43View FIGURE 44View FIGURE 45View FIGURE 46)

Type material examined. Holotype female ex. Coastal She-Oak Casuarina equisetifolia  ( Casuarinaceae  ), AUSTRALIA: Northern Territory, Darwin, Nightcliffe Boat Ramp, 12 º 22 ’ 46 ” S 130 º 50 ’ 34 ” E, 19 May 2008, coll. J.J. Beard and R. Ochoa ( MAGNT). Paratypes. Same data as holotype: 21 females, 1 pharate female, 5 deutonymphs, 7 protonymphs, 15 larvae (24 slides) ( MAGNT, QM, ANIC, USNM).

Diagnosis. Dorsal opisthosomal setae f 2 absent. Dorsal setae broadly lanceolate, strongly barbed, subequal in length. Prodorsal and opisthosomal shield with extensive rugose and wrinkled sculpturing; lateral cuticle smooth. Dorsal opisthosomal setae d 1 -d 1 26–30, e 1 - e 1 23–25 apart. Posterior opisthosomal venter with thickened, barbed setae.

FEMALE (n = 22). Dorsum. ( Figs 42View FIGURE 42, 43View FIGURE 43) Body measurements: distance between setae v 2 -h 1 275–300 [290]; sc 2 -sc 2 98–105 [105]; other measurements: v 2 -v 2 32 –35 [35], sc 1 -sc 1 76–78 [77], c 1 -c 1 31–35 [35], c 2 -c 2 59–77 [59], c 3 -c 3 135–145 [145], d 1 -d 1 26–30 [28], d 2 -d 2 91–105 [105], d 3 -d 3 115–130 [130], e 1 - e 1 23–25 [25], e 2 - e 2 91–105 [105], e 3 - e 3 94–110 [110], f 3 -f 3 80–92 [92], h 1 -h 1 29–32 [31], h 2 -h 2 47–58 [47]. Gnathosoma partially concealed beneath prodorsum. Anterior margin of prodorsum with medial notch (internal depth 15–16), forming pair of broad, fleshy lobes ( Figs 42View FIGURE 42, 43View FIGURE 43); setae v 2 inserted under a fold on each lobe ( Figs 42View FIGURE 42, 43View FIGURE 43). Prodorsal shield with rugose sculpturing. Opisthosomal shield with rugose-oblique sculpturing, becoming transverse-rugose medially. Lateral cuticle surrounding shields weakly tessellate to smooth. All dorsal setae barbed, broadly lanceolate. Setal lengths: v 2 18–22 [18], sc 1 17–18 [17], sc 2 16–22 [22], c 1 16–20 [20], c 2 19–23 [19], c 3 18–19 [19], d 1 15–16 [16], d 2 16–18 [18], d 3 19–20 [19], e 1 13 –15 [15], e 2 18 –22 [22], e 3 18 –20 [20], f 3 15–20 [15], h 1 15–16 [16], h 2 18–20 [20]. Palps. ( Fig. 43View FIGURE 43) Setal formula 0, 0, 0, 2, 3 (1 s+ 2 e). Tibial setae, dorsal 5–7 [5] long, ventral 8–9 [8] long; tarsal eupathidia 6, 8 long; solenidion 6–8 [8] long. Venter. ( Fig. 44View FIGURE 44 a) Cuticle with transverse striae, becoming longitudinal midway between 4 a and ag, extending to genital area; fine striae become coarse lateral to genital area. Setae g 1 inserted in more-or-less transverse line with g 2, g 2 slightly anterior to g 1. Genital shield smooth, poorly defined, ca. 25–30 [30] long, 38–40 [40] wide; anal setae ps 1–3 inserted in longitudinal row on anal plates. Coxal setae fine, except 2 c barbed; setae ps 1–2 barbed; ps 3, g 1 -g 2, ag smooth or with few barbs. Setal lengths: 1a 36 – 50 [50], 1 b 20–29 [29], 2 b 14–17 [14], 2 c 19–23 [23], 3a 38 – 40 [40], 3 b 13–15 [15], 4a 23 – 37 [37], 4 b 12–14 [14], ag 1 18–21 [18], g 1 20–23 [23], g 2 18–20 [20], ps 1 14–15 [15], ps 2 12–14 [14], ps 3 7–12 [12]. Spermatheca. ( Fig. 44View FIGURE 44 b) Spermathecal tube short, narrow, <1 wide, ca. 40 long, expanded at exterior opening, and ending in membranous vesicle 8 long, 2–3 wide. Genital opening between setae ps 2–3. Legs. ( Fig. 45View FIGURE 45) Setal formula for legs I –IV (coxae to tarsi) 1 - 0-3 - 1-4 - 8 (1), 2 - 0-3 - 1-4 - 8 (1), 1 - 1-2 - 0-3 - 4, 1 - 0-1 - 0-3 - 4. Tarsi I and II each with 1 antiaxial solenidion ω" (ta I 10–12 [12] long, ta II 10–11 [11] long) and 2 eupathidia pζ'-pζ" (6–7 [7] long). Leg setation as in Table 1 except: coxae I without 1 c; v ′ absent on tr I –IV, l' present on tr III; genua I –II with d; tarsi I –IV without tc′′.

MALE. Unknown.

DEUTONYMPH (4 paratypes). Dorsum. Body measurements: distance between setae v 2 -h 1 245–270, sc 2 -sc 2 77–88; other measurements: v 2 -v 2 25–28, sc 1 -sc 1 70–74, c 1 -c 1 23–25, c 2 -c 2 68–69, c 3 -c 3 123–128, d 1 -d 1 19–20, d 2 -d 2 69–73, d 3 -d 3 93–99, e 1 - e 1 22–40, e 2 - e 2 85–88, e 3 - e 3 90, f 3 -f 3 65–70, h 1 -h 1 14–21, h 2 -h 2 34–40. Anterior margin of prodorsum with rounded protrusion lacking medial notch. Prodorsal shield smooth with few creases. Opisthosomal shield with c 1 -c 2 and d 1 -d 2 on patches of smooth cuticle, and smooth pygidial shield; all shields surrounded by coarse irregularly transverse striae medially and smooth soft cuticle laterally. All dorsal setae lanceolate, except e 3, f 3, h 1, h 2 narrowly lanceolate. Setal lengths: v 2 25–28, sc 1 17–18, sc 2 19–20, c 1 18–25, c 2 18–20, c 3 16–19, d 1 16, d 2 16–19, d 3 17–20, e 1 13 –15, e 2 14 –16, e 3 16 –17, f 3 16–18, h 1 11–13, h 2 18–19. Palps. Palps similar to adult. Tibial setae, dorsal 6 long, ventral 7–9 long; tarsal eupathidia 5, 6 long; solenidion 4–5 long. Venter. ( Fig. 46View FIGURE 46 c) Cuticle with transverse striae to midway between 4 a and ag, becoming longitudinal, striae coarse around anal region. Anal setae ps 1–3 on weakly defined anal plates. Ventral setae fine, smooth. Setal lengths: 1a 37 – 42, 1 b 14–16, 2 b 11–12, 2 c 17–20, 3 a 30–32, 3 b 10–11, 4 a 17–26, 4 b 10–14, ag 1 10–13, g 1 12–15, ps 1 5–6, ps 2 6–8, ps 3 5–6. Legs. Setal formula for legs I –IV same as adult. Tarsi I and II each with 1 antiaxial solenidion ω" (5–6 long) and 2 eupathidia pζ'-pζ" (5 long).

PROTONYMPH (7 paratypes). Dorsum. Body measurements: distance between setae v 2 -h 1 190–210, sc 2 -sc 2 71–78; other measurements: v 2 -v 2 20–24, sc 1 -sc 1 58–63, c 1 -c 1 17–22, c 2 -c 2 59–61, c 3 -c 3 100–108, d 1 -d 1 15–17, d 2 -d 2 57–61, d 3 -d 3 78–84, e 1 - e 1 12–14, e 2 - e 2 64–69, e 3 - e 3 66–71, f 3 -f 3 41–50, h 1 -h 1 9–15, h 2 -h 2 20–30. Anterior margin of prodorsum with rounded protrusion lacking medial notch. Prodorsal shield smooth with few creases. Opisthosomal shield with c 2 and d 1 -d 2 on patches of smooth cuticle, and smooth pygidial shield; all shields surrounded by coarse irregularly transverse striae medially and smooth soft cuticle laterally. Dorsal setae narrowly lanceolate, except setae v 2, c 1, c 3, d 2, e 1 lanceolate. Setal lengths: v 2 20–24, sc 1 14–15, sc 2 17–18, c 1 18, c 2 16–18, c 3 12–16, d 1 15–16, d 2 15–16, d 3 14–15, e 1 11 –14, e 2 14, e 3 13 –15, f 3 12–13, h 1 9–10, h 2 12–13. Palps. Palps similar to adult. Tibial setae, dorsal 7 long, ventral 5 long; tarsal eupathidia 4–5, 5 – 6 long; solenidion 4–5 long. Vent er. ( Fig. 46View FIGURE 46 b) Striation similar to deutonymph. Anal setae ps 1–3 on weakly defined anal plates. Ventral setae fine, smooth. Setal lengths: 1a 28 – 31, 1 b 13–17, 2 b 13–16, 3 a 23–25, 3 b 9–12, ag 1 8–9, ps 1 4–5, ps 2 3–4, ps 3 3–5. Legs. Setal formula for legs I –IV (coxae to tarsi) 1 - 0-3 - 0-4 - 8 (1), 1 - 0-3 - 0-4 - 8 (1), 1 - 1-2 - 0-3 - 4, 0- 0-1 - 0-3 - 3. Tarsi I and II each with 1 antiaxial solenidion ω" (3–4 long) and 2 eupathidia pζ'-pζ" (5 long). Leg setation as in deutonymph except: seta 2 c, 4 b absent; genu I –II without d; tarsi IV without tc ′. Setae l' added to tr III.

LARVA (15 paratypes). Dorsum. ( Fig. 47) Body measurements: distance between setae v 2 -h 1 150–170, sc 2 - sc 2 65–70; other measurements: v 2 -v 2 17–18, sc 1 -sc 1 49–51, c 1 -c 1 15–16, c 2 -c 2 52–54, c 3 -c 3 89–94, d 1 -d 1 11– 13, d 2 -d 2 47–50, d 3 -d 3 67–72, e 1 - e 1 9–10, e 2 - e 2 55–59, e 3 - e 3 45–53, f 3 -f 3 31–34, h 1 -h 1 5–7, h 2 -h 2 16–18. Dorsal setae barbed; thin except for v 2, c 3, d 2 narrowly lanceolate and c 1, d 1 lanceolate. Anterior margin of prodorsum without medial notch. Prodorsal shield smooth with few creases. Pygidial shield or platelets not apparent; cuticle with irregular transverse lines on soft cuticle. Setal lengths: v 2 13–18, sc 1 9–10, sc 2 12–13, c 1 13–15, c 2 14–16, c 3 9–10, d 1 10–14, d 2 10–11, d 3 8–9, e 1 9 –10, e 2 9, e 3 7 –10, f 3 9–10, h 1 8, h 2 8–11. Palps. Palps similar to adult. Tibial setae, dorsal 6–7 long, ventral 5–6 long; tarsal eupathidia 4–5, 6 long; solenidion 4 long. Venter. ( Fig. 46View FIGURE 46 a) Striation similar to deutonymph. Anal setae ps 1–3 on weakly defined anal plates. Coxal setae fine. Setal lengths: 1a 18 – 23, 1 b 10–14, 3 a 20–23, ps 1 3–4, ps 2 3–4, ps 3 3–4. Legs. Setal formula for legs I – III (coxae to tarsi) 1 - 0-3 - 0-4 - 7 (1), 0- 0-3 - 0-4 - 7 (1), 0- 0-2 - 0-3 - 3. Tarsi I and II each with 1 antiaxial solenidion ω" (ta I 4 long, ta II 3–4 long) and 2 eupathidia pζ'-pζ" (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 ′.

Etymology. The specific name derives from caperatus  (wrinkled), alluding to the dorsal ornamentation.

Remarks. This species was red in colour and found in cracks on bark. Our two new species of Magdalenapalpus  have identical body and leg setation but are distinguished by the form of the dorsal setae and distance between d 1 -d 1 and e 1 -e 1. These new species were also collected from two different genera of host plant, Allocasuarina  and Casuarina  .

Magdalenapalpus caperatus  is similar to M. forsteri  but can be separated by the shape of the dorsal setae which are broadly lanceolate in M. caperatus  (narrowly lanceolate in M. forsteri  ), the distance between setae d 1 -d 1 26–30 (11–16 in M. forsteri  ) and between setae e 1 - e 1 23–25 (9–13 in M. forsteri  ).

MAGNT

Museum and Art Gallery of the Northern Territory

ANIC

Australian National Insect Collection

USNM

Smithsonian Institution, National Museum of Natural History