Misgolas billsheari, Wishart & Rowell, 2008

Wishart, Graham & Rowell, David M., 2008, Trapdoor Spiders of the Genus Misgolas (Mygalomorphae: Idiopidae) from Eastern New South Wales, With Notes on Genetic Variation, Records of the Australian Museum 60 (1), pp. 45-86 : 72-73

publication ID	https://doi.org/ 10.3853/j.0067-1975.60.2008.1495
persistent identifier	https://treatment.plazi.org/id/CE27C928-FF93-590A-FC09-FF1D94B4F819
treatment provided by	Felipe
scientific name	Misgolas billsheari
status	sp. nov.

Treatment

Misgolas billsheari View in CoL n.sp.

Figs 17A–J View Fig , 24D View Fig

Type material. HOLOTYPE?, AM KS86222 , Chichester State Forest SF 16, Lumeah Road, 1.7 km from Allyn Road (32°06'S 151°45'E), 970 m, 4 Feb.–9 Apr. 1993, pit fall trap site 36BG, M. Gray, G. Cassis GoogleMaps . PARATYPES ??, AM KS38602 (4 specimens), data as for holotype GoogleMaps ; AM KS38609 , Chichester SF 16A, Bungari Rd , 1 km from Mt Allyn Rd (32°08'S 151°26'E), 4 Feb.–9 Apr. 1993, pit fall trap site 36BM, M. Gray, G. Cassis GoogleMaps ; AM KS38625 , Chichester SF 16, Mt Allyn Rd. adjacent to Mt Allyn Forest Park, (900 m from junction of Mt Allyn Lookout Rd.) (32°07'S 151°25'E), 970 m, 4 Feb.–9 Apr. 1993, pit fall trap site 36BR, M. Gray, G. Cassis GoogleMaps .

Diagnosis. In male: medium sized brown spiders, carapace length c. 6.0–6.6; retrodorsal surface of metatarsi IV with spines ( Fig. 17J View Fig ); venter pallid with short dark brown maculations concentrated in median band, most dense between posterior book lungs ( Fig. 17D View Fig ). Palpal bulb ( Fig. 17B,C View Fig ) with retrolateral embolic flange with 6 prominent and c. 3 minor folds, distal edge curved under embolus; embolic apophysis absent. Conformation of palp as figured ( Fig. 17A View Fig ); cymbium with c. 30 long attenuate spine projecting forward, retrolateral tibial apophysis basally bent downwards, distal tibial apophysis large.

Description

Male holotype ( Figs 17A–J View Fig ). Size. Carapace length 6.57, width 5.10. Abdomen length 6.08, width 3.23. Colour. In alcohol carapace, legs, palps and chelicerae mid-tan; anterior patellae with weak bilateral dark brown smudges. Pallid hairs absent from carapace and limbs. Abdomen dorsum dark brown with six pallid transverse chevrons ( Fig. 17E View Fig ). Venter pallid with short dark brown maculations most concentrated in longitudinal median band, most dense between posterior book lungs ( Fig. 18D View Fig ). Carapace ( Fig. 17E View Fig ). Edge fringed with black bristles for the most part in single orderly row, a few encroach onto post foveal surface; smaller bristles are associated with each stria and caput; row of 10 (some rubbed off) on caput arch. Group of 7 bristles between PME, 6 on clypeus. Fovea width 1.20, straight, edges recurved. Posterior wall not pitted. Eyes. Raised on mound, area adjacent to eyes black; anterior width 1.13, posterior width 1.10, length 0.67, width/length ratio 1.69. Line joining posterior edge of ALE bisects AME. Posterior row recurved in front and behind. Chelicerae. Rastellum row of 6(6) spines; 1(1) behind. Intercheliceral tumescence a small raised basal cant with sparse cover of brown prostrate setae and extending distally as narrow pallid area without setae. Fang groove with 8(8) promarginal teeth & 6(6) smaller retromarginal/intermediate row teeth. Labium. Bulbous, length 0.54, width 1.08. Labio-sternal suture broad, continuous. Maxillae c. 20(16) short, rounded, anteroental cuspules. Sternum. Length 3.25, width 2.46. Sigilla all round, anterior pair small submarginal; mid pair larger, own diameter from margin; posterior pair largest, 1.5 diameters from margin. Legs. Tibia I with distal bifid apophysis, each process with 2 spines.

palp I II III IV femur 3.19 5.59 5.22 4.55 5.89 patella 1.72 2.95 2.76 2.27 2.95 tibia 3.01 4.11 3.87 2.88 5.59 metatarsus — 4.17 3.87 3.68 5.28 tarsus 1.41 2.52 2.39 2.39 2.95 total 9.33 19.34 18.11 15.77 22.66

Palp ( Fig. 17A View Fig ). Cymbium with c. 30 long, attenuate spines projecting forward distributed over distal third of d surface; some long pallid hairs project forward from lobes. RTA basally bent downwards c. 30°, base swollen, d and rd surface covered with squat pointed spines which continue around tibial excavation and along rv edge; c. 24 longer attenuate spines suspended from short straight DTA. TEM prominent, conical, pallid, adjacent to RTA. TET discernible on pl surface of TEM. Bulb. ( Fig. 17B,C View Fig ) Embolic rl flange with 6 prominent plus 3 minor folds, margin distally convexly curved under embolus as if twisted; embolus straight, apophysis absent. Scopula. Complete on tarsi I, weak and complete on tarsi II, weak and incomplete on metatarsi I and II, absent on legs III and IV. Trichobothria. Palp: tarsi 8, tibia pd 6, rd 6. Leg I: tarsi 11, metatarsi 12, tibia pd 7, rd 7. Leg II: tarsi 11, metatarsi 11, tibia pd 7, rd 7. Leg III: tarsi 13, metatarsi 10, tibia pd 6, rd 7. Leg IV: tarsi 14, metatarsi 14, tibia pd 8, rd 7. Leg spination. Leg I ( Fig. 17F,G View Fig ): tarsi rv line of 5 adjacent scopula; metatarsi pv 01, rv 00011111; tibia v 8, pd 01010. Leg II ( Fig. 17H,I View Fig ): tarsi pv line of 6 & rv line of 13 both adjacent scopula; metatarsi v 12; tibia v 8, pd 01010. Leg III: tarsi v c. 25; metatarsi v c. 13, d 002220; tibia v 0222, pl 0110, rl 0110; patella pd 5. Leg IV ( Fig. 17J View Fig ): tarsi v c. 27; metatarsi v c. 23, rd 0010010; tibia v 0222, rd 001010. Abdomen. Hairs absent. Dorsum with long erect brown bristles and understory small posteriorly inclined bristles. Venter with cover of light brown erect bristles.

Etymology. The species is named in recognition of William A. Shear, gifted teacher and Charles Patterson Distinguished Professor of Biology, Hampden-Sydney College, Virginia, USA.

Distribution and natural history ( Fig. 24D View Fig ). This spider is known only from the Chichester State Forest approximately 25 km South West of the town of Gloucester. The burrow is unknown.