Pedrocortesella bannisteri Hunt 1996, n.sp.
Creators: name: Hunt, Glenn S.
Publisher: name: Zenodo
Year: 1996
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Arachnida
Sarcoptiformes
Licnodamaeidae
Pedrocortesella
Pedrocortesella bannisteri

description: <i>Pedrocortesella bannisteri</i> n.sp. Figs 8, 9, 10D-E Type material. Western Australia: HOLOTYPE adult. WAM, York, 31°53'S 116°46'E, Powder barklMallee leaf litter, berlesate, J. Bannister, 2 November 1991. PARATYPE adults. AM KS46524, SEM stub 150 (ill.), same data as holotype, 2 adults; AM KS43671, same data, 1 adult. Other material examined. Western Australia: AM KS46525, SEM stub no. SI147 (ill.), Mount York, 31°53'S 116°48'E, berlesate She-oak litter, J. Bannister, 16 November 1991, 1 adult. Diagnosis. Body medium-large, length about 550-700 <i>Ilm;</i> scalps rarely (if at all) carried by adult; sensillus with long flattened tuberculate blade; notogaster entirely alveolate-reticulate, without pores in alveoli, notogaster without caudal notch when viewed from above, 5 pairs of long notogastral setae; genital and anal vestibules widely separated; genitoanal chaetotaxy 7:1:2:3, genital setae in arcuate file, level of insertion of <i>ad3</i> between proximal 30-40% of anal valve; claw stalk medium. Description ADULT: <i>Body:</i> brown; length of 4 specimens from the York area are 590, 640, 650 and 670 <i>/lm. Cerotegument:</i> crests of reticulations on prodorsum and notogaster and rim ofbothridium with stellate tubercles of cerotegument which may coalesce giving a "stitched" appearance (Fig. Se); alveoli with scattered granules of cerotegument (Fig. SC). Setae <i>ro</i> and <i>le</i> and notogastral setae with heavy, tapering ribbed encrustation of cerotegument along most their length (Fig. SO). Legs with cerotegument capping the reticulate surface ornamentation which is of much lower relief than in <i>P propinqua. Prodorsum:</i> integument divided into 2 fields: anterior to median transverse furrow reticulate-foveate, foveae not perforated by pore, reticulations larger towards the rostrnm; a bothridial field of more complex topography with reticulations and carinae (Fig. SD). <i>le</i> dorsolateral, distance between them about 0.3-0.5 distance between <i>ro,</i> not arising from large pit, <i>ro</i> ventrolateral. Pedotectal tooth similar to <i>P. propinqua.</i> Bothridium closely adpressed to notogaster, wall more deeply excavated posteriorly (Fig. 8E) and more rounded than in <i>P. propinqua;</i> posterolateral carina situated close to notogaster; sensillus length subequal to interbothridial distance, with long flattened tuberculate blade, broadest subdistally and rounded at end (Fig. 8G). Setae <i>in</i> small, set near bothridium at edge of dorsosejugal furrow, spiniform but basally encased in cerotegument (Fig. 8E). <i>Exuvial sealps:</i> none seen. <i>Notogaster:</i> oval but wide, length:width 2 specimens 440:360, 440:350. Intramarginal depression obovate, broadest anteriorly, not interrupted posteriorly. Dorsum entirely alveolate-reticulate, without pores in alveoli (Fig. 8C). Posterior margin not invaginate when viewed from above, with slight mesal furrow and no prominent carina (though reticulations may become linear) ventral to setae <i>pI</i> when viewed posteriorly (Fig. 8G). Fissura small; <i>ia</i> subparallel, <i>im</i> oblique and <i>ip</i> subperpendicular to sagittal plane. 5 pairs of long notogastral setae; <i>hI</i> widely separated but converging at their tips, each located just inside posterior margin; <i>pI</i> inserted high on posterior flank, slightly closer together than <i>hI; lpx, p2x</i> and <i>p3x</i> arise on posterolateral flank, their insertions just visible from above, <i>lpx</i> closest to fissura <i>ip,</i> inserted posterior to it (Fig. 8B). <i>Gnathosoma:</i> pedipalp tarsus with setae <i>(vt)</i> and <i>I"</i> with very long barbs, <i>em</i> barbs very short; apophysis supporting seta <i>aem</i> low; solenidion <i>omega</i> reaching to base of <i>aem.</i> Rutella basally with moderate concave flexure and buttressing, but without pointed mesad process; transverse striations absent (Fig. 9D). <i>Epimeral region:</i> convex immediately anterior to genital valves, but not overhanging them. <i>Genitoanal region:</i> 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. 9F). Aggenital and adanal areas and genital and anal valves reticulate-alveolate, no pores. Genitoanal chaetotaxy 7:1:2:3; genital setae in arcuate file, all except g7 removed from mesal suture, g5 and g6 most so; <i>gI</i> in a notch on anterior margin slightly removed from inner anterior corner of valve; g5 situated at about 0.5 valve length, g7 inserted anterior to inner posterior corner, not in a notch; setae <i>ag</i> inserted at level between g6 and <i>g7;</i> setae <i>adI</i> postanal, <i>ad2</i> at or just posterior to posterolateral corner of anal valve, <i>ad3</i> level with proximal 0.3-0.4 of anal valve. <i>Legs.</i> Distal apophysis of tibia I overlaps about 30% of tarsus. Tarsal cluster of leg I placed distodorsally on a short apophysis, above and slightly proximal to setae <i>te; fi"</i> enclosed in its own rim; <i>omega I</i> and 2 slightly ventral to it and enclosed in a separate rim, widely separated and shorter 1han <i>fi"</i> (Fig. 10E), hole (presumably cavity for undeveloped <i>famulus)</i> present (Fig. 10E, arrow); tarsus lacking distal recess for receiving retracted unguinal complex, stalk medium length. Comments. The anteriad position of setae <i>ad3,</i> strongly arcuate placement of genital setae and broad separation of genital and anal vestibules suggest that this species is closely related to <i>P. propinqua.</i> It differs in the shape of the intramarginal depression on the notogaster, having an almost perfect oval depression which is not interrupted posteriorly. In <i>P. propinqua,</i> the depression is vase-shaped and interrupted posteriorly. Etymology. The specific epithet honours John Bannister, former Director of the Western Australian Museum, who collected the material. Distribution. York area, east ofPerth, Western Australia.
description: Published as part of <i>Hunt, Glenn S., 1996, A review of the genus Hexachaetoniella Paschoal in Australia (Acarina: Cryptostigmata: Pedrocortesellidae), pp. 223-286 in Records of the Australian Museum 48 (3)</i> on pages 237-240, DOI: 10.3853/j.0067-1975.48.1996.431, http://zenodo.org/record/4654998