Pedrocortesella truncata, Hunt, 1996

Hunt, Glenn S., 1996, A review of the genus Hexachaetoniella Paschoal in Australia (Acarina: Cryptostigmata: Pedrocortesellidae), Records of the Australian Museum 48 (3), pp. 223-286 : 282-285

publication ID

https://doi.org/ 10.3853/j.0067-1975.48.1996.431

DOI

https://doi.org/10.5281/zenodo.4659209

persistent identifier

https://treatment.plazi.org/id/0387B964-395A-FFE8-FA15-F4E5FD2BF938

treatment provided by

Felipe

scientific name

Pedrocortesella truncata
status

sp. nov.

Pedrocortesella truncata View in CoL n.sp.

Figs l3A, 46, 47

Type material. New South Wales: HOLOTYPE adult, AM KS46548 , SEM stub no. SI133 (ill.), beside Pacific Highway, IS km S. of Kempsey, 32°12'S 151°49'E, dry sclerophyll, berlese extraction leaf and bark litter at base of tree, G.S.Hunt, 18 July 1992. View Materials GoogleMaps

Diagnosis. Body medium, length about 500-550 flm; scalps rarely (if at all) carried by adult; sensillus not long flattened blade, distally truncate and covered with a reticulate pattern, not tuberculate; notogaster strongly reticulate-alveolate; 5 pairs of notogastral setae, arising from pits; genitoanal chaetotaxy 7:1:2:3, genital setae essentially in straight file, level of insertion of seta ad3 at about 0.5 anal valve length; claw stalk very short.

Description

ADULT: Body: brown; length 520 flm. Cerotegument: body with conspicuous network of cerotegument reflecting underlying reticulate pattern of integument ( Fig. 46A,D View Fig ). Setae ro and le and notogastral setae without obvious cerotegument. Prodorsum: integument reticulate, carina between le and ro absent; le dorsolateral and close to anterior of prodorsum, distance between them about 0.6 distance between ro, not arising from large pit, ro ventrolateral. Pedotectal tooth similar to P propinqua ( Fig. 46A,B View Fig ). Bothridium strongly adpressed to notogaster ( Fig. 46C View Fig ), wall semicircular in dorsal view, strongly depressed anterolaterally and largely missing posteriorly, posterolateral carina strong, situated close to notogaster ( Fig. 46B View Fig ); sensillus length about 0.7 interbothridial distance, cuneiform with truncated lamina and reticulate surface ornamentation ( Fig. 46B,C View Fig ), posterior margin of prodorsum forming a smooth arc between bothridia. in small, set close bothridial wall, at edge of dorsosejugal furrow, spiniform ( Fig. 46C View Fig ). Exuvial scalps: none seen. Notogaster: oval, length:width 330:250. Intramarginal depression oval. Notogaster reticulate-alveolate, not perforated by pores ( Fig. 46D View Fig ); posterior margin not invaginate when viewed from above, with a strong carina between setae pi when viewed posteriorly (Fig. 460). Fissura ia and im subparallel-oblique, ip perpendicular to sagittal plane; 5 pairs of short notogastral setae arising from small pits, hi moderately close, each located just inside posterior margin; pi with slightly wider spacing than hi; lpx, p2x and p3x arise just inside posterolateral flank, their insertions visible from above, lpx closest to fissura ip, inserted posterior to it ( Fig. 46F View Fig ). Gnathosoma : rutella basally with strong concave flexure and a pair of strong buttresses laterally, small pointed mesad processes present, transverse striations absent (Fig. 47E). Pedipalp tarsus setae (vt) and I" with long barbs, cm short; apophysis supporting acm moderately strong; solenidion not reaching base of acm (Fig. 47C). Epimeral region: strongly convex a small distance anterior to genital valves and not tending to overhang them. Genitoanal region: separation of anal and genital vestibules relatively broad but with interruption to ventral plate microsculpture, wide mesal isthmus without strong transverse grooves between the vestibules (Fig. 47A). Ventral plate reticulate-alveolate. Genitoanal chaetotaxy 7:1:2:3; genital setae essentially in straight file, g] at anterior corner in marginal notch; g5 situated at about 0.5 valve length, g7 inserted well anterior to inner posterior corner in marginal notch; setae ag inserted at similar level to g7; setae ad] postanal, ad3 level at about 0.5 anal valve length (Fig. 47D). Legs. Distal apophysis of tibia overlaps about 40% of tarsus (Fig. l3A). Tarsal cluster of leg I placed distodorsally on apophysis, slightly proximodorsal to setae tc; ft", omega] and 2 enclosed in well-developed almost circular common rim, no partition separating fi" from omega] and 2; terminal setae tend to be flattened with barbs lining their margins; tarsus with slight distal recess for receiving retracted unguinal complex, stalk very short.

Comments. This species is very closely related to P bithongabela , on the basis of integumental sculpturing and the presence of flattened terminal leg setae. It differs principally in having a truncated sensillus.

Etymology. The specific epithet refers to the unusual truncated sensillus.

Distribution. Known only from the type locality, central eastern New South Wales.

AM

Australian Museum

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