Nanometa gentilis Simon, 1908

Álvarez-Padilla, Fernando, Kallal, Robert J. & Hormiga, Gustavo, 2020, Taxonomy And Phylogenetics Of Nanometinae And Other Australasian Orb-Weaving Spiders (Araneae: Tetragnathidae), Bulletin of the American Museum of Natural History 2020 (438), pp. 1-107: 1-107

publication ID 10.1206/0003-0090.438.1.1


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Nanometa gentilis Simon, 1908


Nanometa gentilis Simon, 1908  

Figures 7–8 View FIGURE 7 View FIGURE 8 , 37 View FIGURE 37

Nanometa gentilis Simon, 1908: 421   . Dalmas, 1917: 369, figs. 36–37.

TYPE MATERIAL: Male, female, and immature syntypes. Australia Occidentale (Michnerd), specimen code 23887, deposited at the Muséum National d’Histoire Naturelle (examined and photographed). One juvenile syntype from Western Australia, Lion Hill (= Mt. Helena), -31.883, 116.2. W. Michaelsen and R. Hartmeyer, 10 November 1905. WAM T159.

DIAGNOSIS: Nanometa gentilis   shares with N. forsteri   a long CEBP apophysis; however, in the Australian species the apophysis is shorter and its tip bent apically in dorsal view (fig. 8A–C). Nanometa gentilis   also has a thin apophysis, not found in similar species, that subtends this larger apophysis (fig. 8A). Both species have a conductor that is C-shaped apically (similar to many other Nanometa   species), however, in N. gentilis   the basal apophysis is narrower and more acute than in N. forsteri   (figs. 8A–C, 35A–C). Females of N. gentilis   can be separated from other small Nanometa   species by having circular and deep genital openings half of the epigynum width, located on the posterior half of the epigynal plate and separated by a rectangular septum, almost the same size as these openings (figs. 7E, 8D, E).

DESCRIPTION: Male (GH0114): Total length ca. 2.6 (cephalothorax and abdomen detached). Cephalothorax length 1.1, width 0.8. Clypeus height 1.0 AME diameter. Cephalothorax background pale yellow with pattern of pair of dark gray parallel lines that converge in the fovea and the carapace lateral edges. Endites and sternum color dark brown. Cheliceral promargin and retromargin with three and two teeth respectively, cheliceral denticles present. Abdomen dorsum background light gray, silvery guanine patches conspicuous and covering the anterior half of abdomen except medial line, lateral surface covered with guanine patches over dorsal half, ventral half with brown pattern, ventral surface with a central brown rectangle, flanked by a line of silvery guanine patches. Stridulatory organ formed by a cuticular ridge highly sclerotized on booklung anterior edge, coxa IV retrolateral not examined with SEM. Femur I length 2.0. CEMP square in shape and ca. 1/4 of the cymbium length. Conductor distal apophyses surface smooth, tip C-shaped (figs. 7B, F, H, 8A–C).

Female (WAM T24691 View Materials , T24689 View Materials ): Total length 4.0. Clypeus height approximately the same as the AME (measurements taken from Simon, 1908, description). Cephalothorax and abdomen coloration darker than in male (fig. 7A, C). Epigynum plate one third wider than long, anterior margin rounded (figs. 7E, 8D).

REMARKS: Simon’s original description mentions that there were several specimens from other localities cited as follow: “Stat. 99, Lion Mill: Stat. 100, Lion Mill (propter aquae rivum); Stat. 150. Yallingup: Stat. lös, Broome Hill; Stat. 1 (57, South Albany.” We were able to locate only a juvenile from this location.

MATERIAL EXAMINED: N = 8. AUSTRALIA: Western Australia: Barrabup Road, W. of Nannup , 33° 58′ 59.88″ S, 115° 45′ 0″ E, M.S. Harvey & T.J. Deog, 9 January 1985, at temporary pool, 1 male, 1 juvenile. WAM T20877 View Materials GoogleMaps   ; 8 km W. of Kirup , 33° 43′ 59.88″ S, 115° 49′ 0.12″ E, M.S. Harvey & T.J. Doeg, 9 January 1985, 1 juvenile, WAM T20879 View Materials GoogleMaps   ; Lake Poorginup , 34° 32′ 60″ S, 116° 43′ 59.88″ E, M.S. Harvey & J.M. Waldock, 24 April 1990, 1 male, WAM T24687 View Materials GoogleMaps   ; Mount Chudalup , 34° 45′ 59.76″ S, 116° 4′ 59.88″, M.S. Harvey & J.M. Waldock, 5 January 1990, 1 male, 1 female, WAM T24688 View Materials ; Pemberton, youth hostel, 34° 23′ 60″ S, 115° 58′ 0.12″, M.S. Harvey & J.M. Waldock, 5 January–5 February 1990, 1 male, 1 juvenile, WAM T24689 View Materials   ; Torndirrup National Park, Quaranup Road , 35° 4′ 59.88″, 117° 55′ 0.12″, M.S. Harvey & J.M. Waldock, 24 April 1990, 1 female, WAM T24691 View Materials   ; Western Australia, Two Road, Walpole-Nornalup National Park , 11.1 km W. Walpole, 34° 57′ 55.6″ S, 116° 36′ 23.8″ E, 30 m. G. Hormiga, L. Lopardo, 26 February 2006, eucalypt forest and open heathland, 1 male deposited at GWU (DNA voucher, GH0114) GoogleMaps   .

DISTRIBUTION: This species is endemic to southwestern Western Australia (fig. 37B).


Western Australian Museum














Nanometa gentilis Simon, 1908

Álvarez-Padilla, Fernando, Kallal, Robert J. & Hormiga, Gustavo 2020

Nanometa gentilis

Dalmas, R. 1917: 369
Simon, E. 1908: 421