Nanometa purpurapunctata ( Urquhart, 1889 ), 2020

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

Nanometa purpurapunctata ( Urquhart, 1889) ,

comb. nov.

Figures 26 –29, 37

Linyphia purpura-punctata Urquhart, 1889: 134 (syntypes deposited at the Canterbury Museum, not examined).

Linyphia nitidulum Urquhart, 1889: 136 (holotype not examined). Synonymized by Bryant, 1933.

Erycina violacea Urquhart, 1891: 151 , pl. 21, figs. 4, 14, 17 (type not examined). Synonymized by Bryant, 1933.

Eryciniolia purpurapunctata ( Urquhart, 1889) Strand, 1912: 346 . Name preoccupied.

Eryciniola purpurapunctata ( Urquhart, 1889) Bryant, 1933: 20 , pl. 4, fig. 33, pl. 5, f. 49. Forster and Forster, 1999: 168, fig. 11.31.

Eryciniola purpureopunctata Forster, 1980: 281 , fig. 19.

TYPE MATERIAL: Female syntype from New Zealand, Wairongomai Gorge, deposited at the Canterbury Museum, revised by Dalmas (1917) and Bryant (1933).

DIAGNOSIS: Nanometa purpurapunctata can be differentiated from other Nanometa species by its unique eye arrangement: eyes arranged in two lines, AME smaller than the ALE, lateral eyes separated one or more diameters apart (fig. 26G). The eyes of N. hippai , N. lehtineni , N. lylei and N. padillai also differ from the norm, but they are arranged in three rows with AME substantially smaller than both PME and PLE, lateral eyes not juxtaposed (fig. 26A, G). The male genital morphology of N. pupruropunctata follows the same organization as in the other Nanometa species, but it is unique in having a spherical tegulum considerably wider than the conductor-embolus complex (figs. 27A, 29A–C). Other diagnostic features include: CEBP with a small bifurcated spine (figs. 27C, 29A–C), CEMP short and hook shaped. Conductor with an extra apophysis on its median section (fig. 27B).

DESCRIPTION: Female (TEAU025, TEAU044, TEAU049) total length 3.7. Cephalothorax length 1.1, width 1.4. Clypeus height 2.7 AME diameter. Cephalothorax background pale-yellow pattern coloration dark gray (fig. 26A). Eyes in two rows, subequal in size except AME that are smaller (fig. 26G). Sternum pale yellow (fig. 26E). Cheliceral promargin and retromargin with three and one tooth respectively, ca. three cheliceral denticles. Abdomen dorsum background light gray, silvery guanine patches concentrated in the center around two lines of dark-gray spots (fig. 26A), lateral line of guanine patches complete and surrounded with dark-gray reticulated spots (fig. 26C). Booklung stridulatory organ absent. Tracheae observed with SEM, median trunks branched; lateral tracheae tube shaped. Femur I length 4.4. Copulatory ducts short and well sclerotized, spermathecae translucent and weakly sclerotized (figs. 26H, 29E), accessory duct glands opening acorn shaped as in leucaugines and not concentrated in clusters (fig. 28C).

Male (TEAU025, TEAU045) same as female except as noted. Total length 2.7. Cephalothorax length 1.7, width 1.1. Clypeus 2.0 AME diameter (fig. 26I). Cephalothorax and abdomen coloration slightly darker than in female. Cheliceral promargin and retromargin with three teeth and one tooth respectively, denticles ca. two. Stridulatory organ formed by a cuticular ridge highly sclerotized on the booklung anterior edge (fig. 26F), coxa IV retrolateral not examined with SEM. Femur I length 6.0. Conductor tip with two distal apophyses (figs. 27B, 28E, F, 29A).

VARIATION: Males (N = 2) total length 2.6– 2.7, cephalothorax length 1.1–1.7, width 0.9–1.0.

DISTRIBUTION: This species is distributed on the North Island of New Zealand (fig. 37E).

REMARKS: The specimen identified as “ Nanometa sp. Voucher number FAPDNA066” by Álvarez-Padilla and Hormiga (2011) belongs to N. purpurapunctata .

MATERIAL EXAMINED: N = 20. NEW ZEA- LAND, North Island, Tararua Forest Park, Holdsworth, Loop Trail, 40° 53′ 59.9″ S, 175° 27′ 56.5″ E, 338 m, G. Hormiga & N. Scharff, 14–15 April 2011, 1 male, 1 female (DNA specimen voucher GH1114, 1 female for SEM image voucher TEAU049) GWU; Te Urewera National Park, Lake Waikaremoana, trail to Lake Waikareiti, 38° 44′ 32″ S, 177° 9′ 53.1″ E, 650 m, G. Hormiga & N. Scharff, 6 April 2011, morning collecting, 1 male, 1 female, 15 immatures (adult specimens image voucher number TEAU025 and paratype status) GWU; Te Urewera National Park, Lake Waikaremoana, trail to Lake Waikareiti, 38° 44′ 32″ S, 177° 9′ 53.1″ E, 650 m, G. Hormiga & N. Scharff, 5 April 2011, 1 female, 4 immatures GWU; Te Urewera National Park, Lake Waikaremoana, trail to Lake Waikareiti, 38° 44´32″ S, 177° 9′ 53.1″ E, 650 m, G. Hormiga & N. Scharff, 6 April 2011, 1 male, 1 immatures GWU; Tongariro National Park, Lake Rotopounamu Walk, 39° 1′ 14.5″ S, 175° 43′ 58.6″ E, 744 m, G. Hormiga & N. Scharff, 17 April 2011, 9 males, 2 females, 7 immatures. (DNA specimen voucher GH1118) GWU; Tongariro National Park, Lake Rotopounamu Walk, 39° 1′ 14.5″ S, 175° 43′ 58.6″ E, 744 m, G. Hormiga & N. Scharff, 17 April 2011, 1 female, 4 immatures (female image voucher number TEAU044) GWU; Tongariro National Park, Lake Rotopounamu Walk, 39° 1′ 14.5″ S, 175° 43′ 58.6″ E, 744 m, G. Hormiga & N. Scharff, 17 April 2011, 1 male, 34 immatures (male image voucher number TEAU045) GWU; Tongariro National Park, Lake Rotopounamu Walk, 39° 1′ 14.5″ S, 175° 43′ 58.6″ E, 744 m, G. Hormiga & N. Scharff, 17 April 2011, 1 female, GWU.

Figures

FIGURE 26. Nanometa purpurapunctata (TEAU025). A. Female, dorsal habitus. B. Epigynum ventral. C. Female, lateral habitus. D. Epigynum, caudal. E. Ventral habitus. F.Male, stridulatory organ. G. Female, frontal habitus. H. Epigynum, dorsal digested. I. Male, frontal habitus. Scale bars: A, C, E, 1.0 mm; B, D, F, H, 0.1 mm; G, I, 0.5 mm.