Corasoides motumae, Humphrey, 2017

Humphrey, Margaret, 2017, A Revision and Cladistic Analysis of the Genus Corasoides Butler (Araneae: Desidae) with Descriptions of Nine New Species, Records of the Australian Museum 69 (1), pp. 15-64 : 37

publication ID	https://doi.org/ 10.3853/j.2201-4349.69.2017.1671
persistent identifier	https://treatment.plazi.org/id/03B387B7-3652-FF89-3BC1-FF31FAF9FAC6
treatment provided by	Felipe
scientific name	Corasoides motumae
status	sp. nov.

Treatment

Corasoides motumae View in CoL sp. nov.

Figs 17 View Figure 17 , 18 View Figure 18 , 19b–d View Figure 19

Holotype ♂, Clyde Mountain , NSW [New South Wales], 35°33'S 150°00'E, 30 March 1999, Helen Smith, M. Humphrey, KS.71838 ( AM) GoogleMaps . Paratypes as follows: 1♀, data as for holotype GoogleMaps ; 3♂♂, 1♀, Monga, NSW, 35°34'S 149°56'E, 30 March 1999, H. Smith, M. Humphrey, KS.71839 ( AM) GoogleMaps .

Other material examined. 2♀♀, data as for Monga paratypes; 2♀♀ (remains, including 2 complete abdomens, from electrophoretic work), same data as holotype ( AM).

Diagnosis. Chelicerae and head region dark, almost black. No differentiation in colour between ocular region and rest of head. Cymbium relatively short for genus, less than 2.5 times the diameter of the bulb. Distinguished from C. australis by blunt conductor tip ( Figs 17b View Figure 17 , 19b View Figure 19 ), ventral apophysis lobe-like and completely sclerotized ( Fig. 17b,e View Figure 17 ), and stalk of scape with bulbous portion anterior to genital openings ( Fig. 18b View Figure 18 )

Description. Medium to large spider. Carapace. Head region and chelicerae almost black, indiscernible from colouring surrounding eyes ( Figs 17d View Figure 17 , 18a,e View Figure 18 ). Dark colour, but less intense, extending into the thoracic region of the dorsal carapace. Abdomen. Basic pattern but indistinct. Central pale stripe very wide and largely obscuring rows of spots.

Male ( Figs 17 View Figure 17 , 18a,c,e,g View Figure 18 , 19b–d View Figure 19 ). CL 7.4 (6.9), CW 5.2 (2.5), AL 6.3, AW 3.8, HW 3.4, EpGW 1.8, MOQL 0.73, MOQAW 0.64, MOQPW 0.85, SL 3.9, SW 3.0, ML 2.7, MW 1.3, LL 1.5, LW 1.1, ChelL 3.7 (3.3), ChelW 1.5 (1.3), clypeus height 0.5. Cephalothorax. Sternum longer than wide, distinct point posteriorly with bunch of hairs at point ( Fig. 18c View Figure 18 ). Labium as long as wide, notched basally, slightly rebordered. Chelicerae. Cheliceral bristles reduced, not crossing in front ( Fig. 17d View Figure 17 ). Teeth retromarginal 5(6), promarginal 3(4). Transverse ridges present between margins. Fangs with serrations. Leg lengths:

I II III IV Palp femur 8.3 7.3 6.3 8.0 5.5

patella 3.2 2.5 2.1 2.1 2.1

tibia 9.3 6.5 4.8 7.4 2.1 metatarsus 8.5 6.4 6.9 9.0 —

tarsus 3.3 2.1 2.0 2.3 4.4

total 32.5 24.8 22.0 28.8 14.1

Spination. Leg I: femur d1,1,3,1,1,1,1,3; tibia v2,1,2,2; metatarsus v1,1,2. Leg II: femur d3,1,3,1,1,1,1,3; tibia d1,1 p1; metatarsus d1,1 v2,2,2. Leg III: femur d3,3,3,3,3; tibia d1,2,3 v2,2,2; metatarsus d1,2,2,2, v2,2,2. Leg IV: femur d1,2,1,1,1,1,1,3; tibia d1,1,1 v2,2,2 p1 r1; metatarsus d3,3,3,3,3 v2,1,1,2,2. Palp: femur d1,1,2,3; tarsus several. Row of 7 trichobothria on 1st tarsus. Male palp. Digitiform portion of cymbium relatively short for this genus—cymbium length less than 2.5 times diameter of bulb. Ventral apophysis lobe-like, not enclosing any intersegmental membrane. Retrolateral apophysis broad, flattened, curving retrolaterally, with terminal spine-like portion pointed back towards bulb ( Figs 17e View Figure 17 , 19c View Figure 19 ). Origin of embolus basal. Conductor roughly T-shaped, covering most of bulb. Conductor tip twisted, with ridges ( Figs 17a–c View Figure 17 , 19b,d View Figure 19 ). Single row of 5 trichobothria on cymbium.

Female ( Figs 18b,d,f View Figure 18 ), similar to male. CL 7.4 (7.9), CW 5.1 (5.0), AL 7.6, AW 5.1, HW 3.8, EpGW 1.8, MOQL 0.77, MOQAW 0.65, MOQPW 0.86, SL 3.6, SW 2.9, ML 2.4, MW 1.5, LL 1.4, LW 1.3, ChelL 4.0 (3.9), ChelW 1.5 (1.4), clypeus height 0.4. Chelicerae. Teeth as for male. Leg lengths:

I II III IV Palp femur 7.5 8.6 6.3 7.9 3.3

patella 2.5 2.6 2.3 2.4 1.3

tibia 7.4 5.1 4.6 6.9 2.1 metatarsus 7.0 6.3 5.1 7.1 —

tarsus 2.8 2.1 2.3 2.5 3.3

total 27.1 22.8 20.5 26.8 9.9

Spination. Leg I: femur d1,1,3,1,3,3; tibia v2,2,1,1,2; metatarsus v2,2,2. Leg II: femur d3,4,3,3,3; tibia d1,1,1 v2,2,2 p1,1; metatarsus d1,1 v2,2,2. Leg III: femur d3,3,2,2,1,3,3; tibia d1 v2,2,2 p1,1; metatarsus d3,3,2,2 v1,1,2,3; Leg IV: femur d3,3,3,3,3; tibia d1,1,1 v2,2,2 p1 r1,1; metatarsus: d3,3,3,3,3, v1,1,1,1,2. Palp: femur d1,1,2,3; tarsus several. Trichobothria on 1st tarsus: single row of 6–7 decreasing in length proximally. Abdomen. Anterior lateral spinnerets with tail of small spigots. Epigyne ( Fig. 18b View Figure 18 ). Length almost equal to width. No ridges or beaks. Stalk of scape bulbous posteriorly, narrow, less than half the diameter of the genital atria. Lateral extension of scape short extending to halfway across apparent genital atrium area. Origins of insemination ducts almost posterior. Insemination ducts very weakly convoluted (1 bend) ( Fig. 18d,f View Figure 18 ). No diverticula. Spermathecae touching (Fig, 18d).

Habitat. Cool temperate rainforest and wet sclerophyll forest. Webs commonly found in crevices in dead tree trunks, fallen timber and rubble. Some webs in the wet sclerophyll descended into crevices in the ground or leaf litter. Web heights from ground level to 1.5 m.

Distribution. Monga and Clyde Mountain, southeastern New South Wales ( Fig. 18g View Figure 18 ).

Etymology. Named after Dr Helen Motum Smith who collected the first specimens known to me.