Crossipalpus muellerianae Smiley, Frost and Gerson, 1996,

Beard, Jennifer J., Seeman, Owen D. & Bauchan, Gary R., 2014, Tenuipalpidae (Acari: Trombidiformes) from Casuarinaceae (Fagales), Zootaxa 3778 (1), pp. 1-157: 22-29

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

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

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http://treatment.plazi.org/id/194C87D0-FFF3-FFC6-F387-FC23FB1DFECB

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scientific name

Crossipalpus muellerianae Smiley, Frost and Gerson, 1996
status

 

Crossipalpus muellerianae Smiley, Frost and Gerson, 1996 

( Figs 13–18View FIGURE 13View FIGURE 14View FIGURE 15View FIGURE 16View FIGURE 17View FIGURE 18)

Crossipalpus muellerianae Smiley, Frost and Gerson, 1996: 174  , figs 19–20.

Type material examined. Holotype female ex. Slaty She-Oak Allocasuarina muelleriana  ( Casuarinaceae  ) [feeding on bark of branchlets], AUSTRALIA: South Australia, Flinders Ranges, St Mary’s Peak, at 750 m, 3 October 1995, coll. W. Frost ( WINC; on same slide as 7 paratype specimens). Paratypes. 2 females, 1 pharate female, 1 deutonymph, 3 protonymphs, 1 pharate larva, and 1 larva, same data as holotype ( WINC; 2 slides, including holotype slide); deutonymph, same data as holotype, on slide with 2 females of Me. delfinadae  ( WINC). Non-type material examined. 9 females, 3 pharate females, 3 deutonymphs, 1 pharate protonymph, and 1 larva ex. A. muelleriana  , AUSTRALIA: South Australia, Adelaide, Athelston, Maryvale Road, Wadmore Park, 34 ° 52 ’ 49 ” S 138 ° 42 ’ 10 ” E, 21 April 2009, coll. J.J. Beard and C.J. Burwell (QM, USNM) ( BRI voucher BRI [ AQ 818802View Materials]).

Diagnosis. Dorsal setae all thinly lanceolate and weakly barbed. Prodorsal setae v 2 obviously longer than setae sc 1. Palpal segments elongated, thin. Genua I –II with seta l ′′ without d; tarsi I –IV with seta tc′′.

FEMALE (n = 12). Dorsum. ( Fig. 13View FIGURE 13 a) Body measurements: distance between setae v 2 -h 1 335–370 [345]; sc 2 - sc 2 93–105 [105]; other measurements: v 2 -v 2 21–36 [29], sc 1 -sc 1 79–89 [88], c 1 -c 1 14–24 [24], c 2 -c 2 81–96 [93], c 3 -c 3 115–130 [130], d 1 -d 1 19–27 [24], d 2 -d 2 69–87 [85], d 3 -d 3 99–115 [105], e 1 - e 1 13–18 [14], e 2 - e 2 93–105 [97], e 3 - e 3 82–94 [85], f 3 -f 3 63–76 [72], h 1 -h 1 12–17 [12], h 2 -h 2 41–52 [48]. Gnathosoma completely concealed beneath prodorsum. Anterior margin of prodorsum rounded; setae v 2 often inserted ventrally on anterior margin of prodorsum ( Fig. 14View FIGURE 14). Prodorsal shield weakly developed with longitudinal to oblique folds and lines. Some transverse folds between dorsal shields, just anterior to c -setae. Opisthosomal shield weakly developed, mostly with oblique or longitudinal lines and weak folds; short series transverse folds across width of shield just anterior e 1 -e 1; small areas of smooth cuticle between setae c 1 -c 1 and d 1 -d 1 and between d 1 -d 2. Lateral cuticle surrounding shields mostly smooth, with few coarse striae and weak folds. Most dorsal setae thin and barbed; setae v 2, sc 2, e 3, f 2, f 3, and h 2 longer and thicker than other dorsal setae; setae h 1 short, palmate to lanceolate. Setal lengths: v 2 21– 26 [23, 25], sc 1 8–13 [12], sc 2 11–20 [18, 19], c 1 6–8 [7, 8], c 2 6–11 [9], c 3 10–16 [13, 14], d 1 4–7 [5, 6], d 2 6–9 [7, 9], d 3 10–15 [12, 13], e 1 4 –8 [6, 7], e 2 10 –15 [14, 15], e 3 17 –22 [20], f 3 20–24 [22, 23], h 1 5–10 [7, 8], h 2 20– 24 [22, 23]. Palps. ( Figs 13View FIGURE 13 b, 14) Setal formula 0, 0, 0, 1, 3 (1 s+ 2 e). Tibial seta 9–12 [10] long; tarsal eupathidia 4– 7 [5] long (thin, tapered; could be seta), 5–8 [6, 7] long (thick, blunt); solenidion 4–6 [5, 6] long.

Venter. ( Figs 14View FIGURE 14, 15View FIGURE 15 a) Ventral cuticle of anterior prodorsal margin with coarse striae forming triangular pattern ( Fig. 14View FIGURE 14); cuticle between setae 1 a - 3 a with broadly separated transverse striae; fine longitudinal striae between setae 3 a to just posterior setae 4 a; narrow band of transverse striae ca. 10 wide posterior 4 a, then fine longitudinal striae to ag; oblique striae between ag -ag forming inverted “v” shape; coarse striae laterad genital region, longitudinal to oblique. Genital setae widely separated, inserted on posterior corners of genital flap in more-or-less transverse row, g 1 inserted slightly posterior to level of g 2. Genital shield weakly developed, cuticle on genital flap between g setae with mixed oblique striae (g 1 -g 1 33–36) anal setae ps 1–2 inserted in longitudinal line along inner edge of anal plates; seta ps 3 absent ( Fig. 15View FIGURE 15 a). Coxal, genital and anal setae fine, except 2 c thicker, weakly barbed; setae 1 a, 3 a, 4 a long, finely tapered, often broken and difficult to determine full length. Setal lengths: 1a 48 – 82 [48, 57], 1 b 19–32 [22, 23], 2 b 17–29 [21, 26], 2 c 18–24 [18, 19], 3a 38 – 81 [38], 3 b 17–25 [22], 4a 40 – 78 [54], 4 b 17–28 [25, 28], ag 1 10–16 [11], g 1 19–26 [24], g 2 18–25 [23], ps 1 9–14 [14], ps 2 9–14 [13]. Spermatheca. ( Fig. 15View FIGURE 15 b) Spermathecal tube long, distinctly broad near external opening, becoming narrow and convoluted distally, maximum 2 wide, ca. 110 long. Spermatheca vesicle 10–13 long, 2–3 wide proximally, 3–5 wide distally. Genital opening between setae ps 2 and posterior margin of genital flap. Legs. ( Fig. 16View FIGURE 16) Setal formula for legs I –IV (coxae to tarsi) 1 - 1-3 - 1-4 - 9 (1), 2 - 1-3 - 1-4 - 9 (1), 1-2 - 2 - 0-3 - 5, 1 - 1 - 1 - 0-3 - 5. Tarsi I and II each with 1 antiaxial solenidion ω" (ta I 5–7 [6] long, ta II 4–6 [6] long) and 2 eupathidia pζ'-pζ" (6–7 [6] long). Leg setation as in Table 1 except: coxae I without 1 c; genua I –II with l", without d; tarsi I –IV with tc". Setae v' added to tr IV.

MALE. Unknown.

DEUTONYMPH (n = 3). Dorsum. ( Fig. 17View FIGURE 17) Body measurements: distance between setae v 2 -h 1 285–305, sc 2 - sc 2 83–91; other measurements: v 2 -v 2 18–21, sc 1 -sc 1 66–75, c 1 -c 1 14–16, c 2 -c 2 72–89, c 3 -c 3 107–109, d 1 -d 1 16–18, d 2 -d 2 64–78, d 3 -d 3 86–99, e 1 - e 1 8–11, e 2 - e 2 72–92, e 3 - e 3 71–78, f 3 -f 3 59–62, h 1 -h 1 12–15, h 2 -h 2 42–46. Prodorsal shield similar to female, but with fewer folds, with central longitudinal folds and sublateral oblique folds. Opisthosoma with widely separated transverse folds between c 1 and e 1, and distinct oblique folds between c 2 -c 3; paired minute pores present between c 1 -c 2, d 1 -d 2 and laterad e 1. Setal lengths: v 2 29–35, sc 1 6–10, sc 2 13–20, c 1 3–7, c 2 4–7, c 3 8–12, d 1 3–5, d 2 4–7, d 3 9–11, e 1 3 –6, e 2 9 –15, e 3 20 –24, f 3 22–26, h 1 4–6, h 2 22–25. Palps. Palps same as adult. Tibial seta 8–9 long; tarsal eupathidia 3–5 long (thin, blunt), 5–6 long (thick, blunt); solenidion 3–5 long. Venter. Cuticle with striae similar to adult female. Coxal, genital and anal setae fine. Setal lengths: 1a 35 – 49, 1 b 16–19, 2 b 12–18, 2 c 17–20, 3 a 34–40, 3 b 13–20, 4 a 35–41, 4 b 14–17, ag 1 8–11, g 1 10–17, ps 1 7–8, ps 2 7–10. Legs. Setal formula for legs I –IV (coxae to tarsi) same as adult female except tr IV nude: 1 - 1-3 - 1-4 - 9 (1), 2 - 1-3 - 1-4 - 9 (1), 1-2 - 2 - 0-3 - 5, 1 - 0-1 - 0-3 - 5. Tarsi I and II each with 1 bulbous antiaxial solenidion ω" (3-4 long) and 2 eupathidia pζ'-pζ" (5–6 long). Leg setation as in adult except: tr IV without seta v ′. Setae v' added to tr I –III.

PROTONYMPH (n = 3). Dorsum. Body measurements: distance between setae v 2 -h 1 195–200, sc 2 -sc 2 73– 75; other measurements: v 2 -v 2 18–19, sc 1 -sc 1 57–60, c 1 -c 1 11–13, c 2 -c 2 62–64, c 3 -c 3 93–100, d 1 -d 1 12–14, d 2 - d 2 56–58, d 3 -d 3 74–77, e 1 - e 1 6–8, e 2 - e 2 65–68, e 3 - e 3 51–55, f 3 -f 3 41–43, h 1 -h 1 9–11, h 2 -h 2 23–25. Prodorsal shield similar to female, but with fewer and much weaker folds. Setal lengths: v 2 24–25, sc 1 6–7, sc 2 11–14, c 1 11–13, c 2 5–7, c 3 9–11, d 1 4–5, d 2 5–6, d 3 7–10, e 1 2 –4, e 2 10 –12, e 3 14 –17, f 3 16–18, h 1 4–5, h 2 18–21. Palps. Palps same as adult. Tibial seta 8 long; tarsal eupathidia both blunt 4, 5; solenidion 3–4 long. Venter. Cuticle with striae similar to adult. Coxal, genital and anal setae fine. Setal lengths: 1a 28 – 39, 1 b 16–18, 2 b 15–16, 3 a 17–26, 3 b 11–14, ag 1 8, ps 1 6–7, ps 2 7–8. Legs. Setal formula for legs I –IV (coxae to tarsi) 1 - 0-3 - 0-4 - 9 (1), 1 - 0-3 - 0-4 - 9 (1), 1 - 1-2 - 0-3 - 5, 0- 0-1 - 0-3 - 3. Tarsi I and II each with 1 antiaxial solenidion ω" (ta I 3–4 long, ta II 3 long) and 2 eupathidia pζ'-pζ" (5 long). Leg setation as in deutonymph except: seta 2 c absent; seta 4 b absent; tr I –II without seta v ′; ge I –II without seta l′′; ta IV without setae tc ′, tc′′. Setae l' added to tr III.

LARVA (n = 2). Dorsum. ( Fig. 18View FIGURE 18) Body measurements: distance between setae v 2 -h 1 140–160, sc 2 -sc 2 61– 71; other measurements: v 2 -v 2 11–15, sc 1 -sc 1 47–55, c 1 -c 1 10–11, c 2 -c 2 55–58, c 3 -c 3 82–90, d 1 -d 1 13–15, d 2 -d 2 43–49, d 3 -d 3 59–61, e 1 - e 1 7–9, e 2 - e 2 49–57, e 3 - e 3 36–50, f 3 -f 3 21–28, h 1 -h 1 5–9, h 2 -h 2 10–15. Prodorsum with central area smooth to finely striate; lateral cuticle with coarse longitudinal to oblique striae. Opisthosomal cuticle with mostly transverse striae, with some longitudinal striae posteriorly. Setal lengths: v 2 15–24, sc 1 5–7, sc 2 9–13, c 1 4–5, c 2 4–6, c 3 7–8, d 1 3–5, d 2 4–8, d 3 6–7, e 1 3 –4, e 2 6 –8, e 3 10 –13, f 3 11–13, h 1 4–5, h 2 15–17. Palps. ( Fig. 18View FIGURE 18) Palps same as adult. Tibial seta length 6–8; tarsal eupathidia 3–4 long (blunt), 4–5 long (blunt); solenidion 2–3 long. Venter. Striae transverse to anal area, becoming longitudinal and coarse around anal area. All setae fine. Setal lengths: 1a 21 – 37, 1 b 10–18, 3 a 22–33, ps 1 6–7, ps 2 5–8. Legs. ( Fig. 18View FIGURE 18) 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 bulbous antiaxial solenidion ω" (2–3 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′′.

Remarks. Smiley et al. (1996) remarked that this species was unique with the adult female having tarsi I –IV 6 (1)- 6 (1)- 6 - 5. This is incorrect and the true count is 9 (1)- 9 (1)- 5 - 5. Individuals were found wedged within pits and crevices on the bark of stems of the host ( Fig. 17View FIGURE 17).

This species is very similar to Cr. verticillatae  but can be readily distinguished from it by the presence of setae tc'' on tarsi I –IV (absent in Cr. verticillatae  ), the finer palpal segments (stout in Cr. verticillatae  ), palmate setae h 1 (lanceolate setae h 1 in Cr. verticillatae  ), and irregular dorsal reticulation (linear in Cr. verticillatae  ).

WINC

Waite Insect and Nematode Collection

USNM

Smithsonian Institution, National Museum of Natural History

BRI

Queensland Herbarium

Kingdom

Animalia

Phylum

Arthropoda

Class

Arachnida

Order

Prostigmata

Family

Tenuipalpidae

Genus

Crossipalpus

Loc

Crossipalpus muellerianae Smiley, Frost and Gerson, 1996

Beard, Jennifer J., Seeman, Owen D. & Bauchan, Gary R. 2014
2014
Loc

Crossipalpus muellerianae

Smiley 1996: 174
1996