Magdalenapalpus forsteri 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: 62-67

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/3B839075-2F9B-4F23-B05E-C12475321D22

taxon LSID

lsid:zoobank.org:act:3B839075-2F9B-4F23-B05E-C12475321D22

treatment provided by

Plazi

scientific name

Magdalenapalpus forsteri Seeman and Beard
status

sp. nov.

Magdalenapalpus forsteri Seeman and Beard  sp. nov.

( Figs 48–53View FIGURE 48View FIGURE 49View FIGURE 50View FIGURE 51View FIGURE 52View FIGURE 53)

Type material examined. Holotype female ex. needles of Forest Oak Allocasuarina torulosa  ( Casuarinaceae  ), AUSTRALIA: SSW Mundubbera, base of Mt Lorna, “Toondahra”, 25 º 59 ′ 15 ′′ S 151 º 21 ′ 26 ′′ E, 12 May 2007, coll. J.J. Beard and P.I. Forster (QM). Paratypes. 10 females, 1 male, 1 pharate male, 3 deutonymphs, 7 larvae (QM, ANIC, USNM).

Diagnosis. Dorsal opisthosomal setae f 2 absent. Dorsal setae narrowly lanceolate, barbed. Prodorsum with irregular polygonal and folded sculpturing; opisthosomal shield with irregular folds; lateral cuticle weakly papillate. Dorsal opisthosomal setae d 1 -d 1 11–16, e 1 - e 1 9–13 apart. Posterior opisthosomal venter with fine barbed setae.

FEMALE (n = 11). Dorsum. ( Fig. 48View FIGURE 48 a) Body measurements: distance between setae v 2 -h 1 310–325 [325]; sc 2 - sc 2 105–115 [115]; other measurements: v 2 -v 2 23–32 [32], sc 1 -sc 1 81–89 [89], c 1 -c 1 27–31 [28], c 2 -c 2 85–92 [92], c 3 -c 3 140–160 [160], d 1 -d 1 11–16 [11], d 2 -d 2 97–105 [105], d 3 -d 3 120–125 [125], e 1 - e 1 9–13 [11], e 2 -e 2 105–115 [115], e 3 - e 3 91–98 [96], f 3 -f 3 72–81 [78], h 1 -h 1 24–30 [27], h 2 -h 2 50–58 [53]. Gnathosoma almost completely concealed beneath prodorsum. Anterior margin of prodorsum with medial notch (internal depth 21–26) forming 1 pair of broad lobes each bearing v 2. Prodorsal shield with wrinkled ridge-like sculpturing, forming irregular polygons posteromedially. Opisthosomal shield with sparse irregular rugose sculpturing. Lateral cuticle surrounding shields papillate. All dorsal setae barbed, lanceolate. Setal lengths: v 2 13–19 [13], sc 1 15–19 [16], sc 2 18–22 [22], c 1 19–22 [28], c 2 17–20 [20], c 3 16–19 [17], d 1 13–17 [13], d 2 17–22 [19], d 3 15–21 [20], e 1 12 –16 [12], e 2 17 –21 [19], e 3 18 –21 [21], f 3 19–23 [21], h 1 15–20 [20], h 2 15–21 [16]. Palps. ( Fig. 48View FIGURE 48 b) Setal formula 0, 0, 0, 2, 3 (1 s+ 2 e). Tibial setae, dorsal 7–9 [7] long, ventral 10–11 [10] long; tarsal eupathidia 7–8 [7–8] long, 7–9 [8, 9] long; solenidion 7–8 [7, 8] long. Venter. ( Fig. 49View FIGURE 49 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; anal setae ps 1–3 inserted in longitudinal row on anal plates. Coxal setae fine; setae ps 1–2, ps 3, g 1 -g 2, ag weakly barbed. Setal lengths: 1a 62 – 74 [74], 1 b 21–26 [21], 2 b 16–21 [18], 2 c 20–27 [24], 3a 44 – 72 [72], 3 b 18–21 [18], 4a 46 – 63 [46], 4 b 15–40 [15], ag 1 14–20 [15], g 1 23–26 [24], g 2 21–25 [23], ps 1 16–18 [17], ps 2 16–19 [18], ps 3 10–14 [11]. Spermatheca. ( Fig. 49View FIGURE 49 b) Spermathecal tube ca. 1 wide, ca. 80 long, terminating in elongate membranous vesicle 6–8 long, 2–3 wide. Genital opening between setae ps 2–3. Legs. ( Fig. 50View FIGURE 50) 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 9–12 [12] long) and 2 eupathidia pζ'-pζ" (7–8 [7] long). Leg setation as in Table 1 except: cx I without 1 c; v ′ absent on tr I –IV, l' present on tr III; ge I –II with only d present (l ′ and l′′ absent), ge III –IV nude; ta I –IV without tc′′.

MALE (1 paratype). Dorsum. ( Fig. 51View FIGURE 51) Body measurements: distance between setae v 2 -h 1 220, sc 2 -sc 2 88; other measurements: v 2 -v 2 23, sc 1 -sc 1 68, c 1 -c 1 23, c 2 -c 2 73, c 3 -c 3 107, d 1 -d 1 11, d 2 -d 2 74, d 3 -d 3 86, e 1 - e 1 12, e 2 - e 2 74, e 3 - e 3 64, f 3 -f 3 52, h 1 -h 1 12, h 2 -h 2 33. Gnathosoma partially concealed beneath prodorsum. Anterior margin of prodorsum with median notch (internal depth 20–26). Prodorsal shield lightly punctate, with few striations. Opisthosoma with mesonotal shield bearing c 1, c 2, d 1 and d 2, with few striations; and pygidial shield bearing e 1, e 3, f 3, h 1, h 2, with few striations; shields separated by transverse striae; papillate cuticle laterad prodorsal shield. Setal lengths: v 2 17, sc 1 14, sc 2 17, c 1 12, c 2 15, c 3 16, d 1 10, d 2 16, d 3 16, e 1 8, e 2 17, e 3 16, f 3 16, h 1 13, h 2 16. Palps. ( Fig. 51View FIGURE 51) Palps similar to female, except solenidia greatly swollen. Tibial setae, dorsal 8 long, ventral 10 long; tarsal eupathidia 10, 11 long; solenidion 11 long. Venter. ( Fig. 52View FIGURE 52) All striae transverse, becoming coarse posteriorly and weak around setae ag 1. Coxal setae fine. Setae ag 1, g 1, g 2 thin, barbed; ps 2, ps 3 thin, smooth; setae ps 1 modified to form thick blades (sexually dimorphic). Setal lengths: 1a 52, 1 b 20, 2 b 17, 2 c 17, 3a 62, 3 b 13, 4a 42, 4 b 17, ag 1 11, g 1 11, g 2 13, ps 1 13, ps 2 11, ps 3 10. Aedeagus. ( Fig. 52View FIGURE 52) Narrow, sclerotised, tapering to a point, 56 long. Membranous duct runs from inside aedeagus, becoming indistinguishable. Legs. ( Fig. 51View FIGURE 51) Setal formula same as female. Tarsi I and II each with 1 antiaxial solenidion ω" (ta I 12 long, ta II 11 long) and 2 eupathidia pζ'-pζ" (ta I 8, 7 long; ta II 7, 7 long). Solenidia much thicker and longer than in female.

DEUTONYMPH (3 paratypes). Dorsum. Body measurements: distance between setae v 2 -h 1 255–275, sc 2 -sc 2 85–97; other measurements: v 2 -v 2 21–24, sc 1 -sc 1 70–78, c 1 -c 1 19–28, c 2 -c 2 70–79, c 3 -c 3 120–130, d 1 -d 1 13–17, d 2 -d 2 69–78, d 3 -d 3 95–103, e 1 - e 1 10–13, e 2 - e 2 88–94, e 3 - e 3 77–84, f 3 -f 3 61–64, h 1 -h 1 15–17, h 2 -h 2 20–22. Gnathosoma not concealed by prodorsum. Anterior margin of prodorsum with rounded protrusion lacking medial notch. Prodorsal shield smooth, delineated by striae. 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 to oblique striae. All dorsal setae lanceolate. Setal lengths: v 2 23–26, sc 1 16–17, sc 2 19–26, c 1 19–22, c 2 21–22, c 3 19–22, d 1 12– 16, d 2 16–21, d 3 19–23, e 1 11 –13, e 2 20 –22, e 3 20 –23, f 3 19–23, h 1 15–17, h 2 20–22. Palps. Palps similar to adult. Tibial setae, dorsal 6 long, ventral 8 long; tarsal eupathidia 6–7, 5 – 6 long; solenidion 5 long. Venter. 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. Most ventral setae fine, smooth, except ps 1 barbed, ps 2 lightly barbed. Setal lengths: 1a 38 – 51, 1 b 14–18, 2 b 12–14, 2 c 21–22, 3 a 36–44, 3 b 13–15, 4 a 33–38, 4 b 12, ag 1 10–13, g 1 13– 17, ps 1 9–11, ps 2 10–12, ps 3 6–8. Legs. Setal formula for legs I –IV same as adult. Tarsi I and II each with 1 antiaxial solenidion ω" (ta I 6–7 long, ta II 6 long) and 2 eupathidia pζ'-pζ" (ta I 6 long; ta II 5–6 long).

PROTONYMPH. Unknown.

LARVA (4 paratypes). Dorsum. ( Fig. 53View FIGURE 53) Body measurements: distance between setae v 2 -h 1 145–165, sc 2 -sc 2 64–69; other measurements: v 2 -v 2 17–22, sc 1 -sc 1 53–60, c 1 -c 1 15–16, c 2 -c 2 51–57, c 3 -c 3 86–93, d 1 -d 1 8–10, d 2 - d 2 42–50, d 3 -d 3 57–67, e 1 - e 1 5–7, e 2 - e 2 52–58, e 3 - e 3 45–46, f 3 -f 3 33–37, h 1 -h 1 7–8, h 2 -h 2 16–23. Gnathosoma not concealed by prodorsum. Anterior margin of prodorsum without medial notch. Prodorsal shield smooth, delineated by striae. Pygidial shield or platelets not apparent; cuticle with irregular transverse lines on soft cuticle. Dorsal setae barbed, thin to narrowly lanceolate. Setal lengths: v 2 16–23, sc 1 10–12, sc 2 15–17, c 1 9–14, c 2 11–13, c 3 13–14, d 1 6–9, d 2 11–17, d 3 13–15, e 1 6 –7, e 2 12 –14, e 3 12 –14, f 3 14–17, h 1 9–10, h 2 14–16. Palps. ( Fig. 53View FIGURE 53) Palps similar to adult. Tibial setae, dorsal 7–8 long, ventral 5 long; tarsal eupathidia 5, 4 long; solenidion 4 long. Venter. Striation similar to deutonymph. Anal setae ps 1–3 on weakly defined anal plates. Coxal setae fine. Setal lengths: 1a 24 – 36, 1 b 10–13, 3 a 22–26, ps 1 4–5, ps 2 4, ps 3 3–4. Legs. ( Fig. 53View FIGURE 53) 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 Table 1 except genua I –III nude.

Etymology. It is with great pleasure that we name this species in honour of Queensland botanist, Paul Forster, for the numerous identifications and host plant collections he has made for us over the years.

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

ANIC

Australian National Insect Collection

USNM

Smithsonian Institution, National Museum of Natural History