Glenognatha emertoni Simon 1887
Creators: name: Jimmy Cabra-García
name: Antonio D. Brescovit
Publisher: name: Zenodo
Year: 2016
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Arachnida
Araneae
Tetragnathidae
Glenognatha
Glenognatha emertoni

description: Glenognatha emertoni Simon, 1887
(Figs. 126–129, 137)
Glenognatha emertoni Simon, 1887: 194 (male syntypes from Arizona, United States of America, deposited in MNHN, examined); Simon 1894: 717, figs. 790–791; Banks 1913: 180, pl. 2, fig. 22; Levi 1980: 66, figs. 255–271; Cabra-García et al. 2014: 1029, figs. 1F, 2D, 2G, 4B, 5F–G, 7E, 9C–D; World Spider Catalog 2015.
Diagnosis. Males of G. emertoni are distinguished from all other congeneric species by the presence of a mesally oriented projection located in the distal margin of the cheliceral basal segment (Fig. 127 A). Females resemble those of G. minuta in having an anterior cheliceral bulge (Fig. 127F), but differ by the reduced size of the spermathecae in relation with the uterus externus (Figs. 129 A –C) and the apical position of the cheliceral bulge (Fig. 127F).
Description. Male and female described by Levi (1980). Additional data.
Male (USA, Arizona, AMNH). Habitus as in Figures 126 A –D. Tracheal spiracle well-sclerotized. Total length 4.25. Cephalothorax 2.07 long, 1.57 wide, 1.15 high. Abdomen 2.32 long, 1.90 wide, 1.80 high. Sternum 1.00 long, 1.00 wide. Eye diameters and interdistances: AME 0.10, ALE 0.07, PME 0.12, PLE 0.09. AME-AME 0.1, AME- ALE 0.18, PME-PME 0.18, PME-PLE 0.19, ALE-PLE 0.01. Clypeus height 2.30. Three promarginal and four retromarginal teeth (Figs. 127 A –C). Leg measurements: I: femur 2.80, patella 0.75, tibia 2.92, metatarsus 2.57, tarsus 0.82, total 9.87; II: 2.67, 0.75, 2.80, 2.40, 1.12, 9.75; III: 1.65, 0.50, 1.47, 1.50, 0.72, 5.85; IV: 2.27, 0.55, 2.00, 1.90, 0.90, 7.65. Metatarsus IV with one trichobothrium. DTS 0.27. DTE 0.62. Palp as in Figures 128E–H. Embolus with a nearly 90º curved tip (Fig. 128G).
Female (USA, Arizona, AMNH). Habitus as in Figures 126E–H. Tracheal spiracle well-sclerotized. Total length 5.05. Cephalothorax 2.45 long, 1.92 wide, 1.55 high. Abdomen 2.90 long, 2.35 wide, 2.30 high. Sternum 1.32 long, 1.20 wide. Eye diameters and interdistances: AME 0.10, ALE 0.11, PME 0.13, PLE 0.10. AME-AME 0.15, AME-ALE 0.22, PME-PME 0.24, PME-PLE 0.27, ALE-PLE 0.01. Clypeus height 2.9. Three promarginal and four retromarginal teeth (Figs. 127D–F). Leg measurements: I: femur 3.00, patella 0.70, tibia 3.25, metatarsus 2.77, tarsus 1.30, total 11.07; II: 2.95, 0.90, 2.92, 2.50, 1.22, 10.5; III: 2.17, 0.62, 1.62, 1.65, 0.85, 6.92; IV: 2.65, 0.67, 2.17, 2.02, 0.92, 8.45. Metatarsus IV with one trichobothrium. DTS 0.37. DTE 0.62. Tracheal system as in Figures 129F–I. Spinnerets as in Figures 129J–L. Genitalia with strongly reduced spermathecae and copulatory ducts (Figs. 129 A –E). UE with a median projection (Fig. 129 A).
Variation. Male total length 3.8–5.2 (N = 6; average 4.6), cephalothorax length 1.8–2.3 (N = 6; average 2.1), femur I length 2.8–3.2 (N = 6; average 2.9). Female total length 4.0–5.1 (N = 10; average 4.5), cephalothorax length 1.8–2.6 (N = 10; average 2.1), femur I length 2.4–3.25 (N = 10; average 2.7).
Distribution. Known in Arizona and New Mexico states in United States of America (Fig. 137).
Additional material examined (N = 22). UNITED STATES OF AMERICA: Arizona: Big Rock Camp., Madera Can., [31º43´N, 110º52´W], elev. [2100m], 10.ix.1941, W. Ivie leg., 1♀ (AMNH); 1♀ 1♂ (AMNH); Wet Canyon For. Camp, Graham Mts., [32º42´N, 109º52´W], elev. [2000m], 13.ix.1952, B. Malkin leg., 1♂ (AMNH); Southwestern Res. Sta., 5 miles west portal, [31º53´N, 109º12´W], elev. [1645m], 2–19.v.1956, M. Statham leg.,
2♀ 1♂ (AMNH); 6–20.vii.1955, W. J. Gertsch leg., 3♀ (AMNH); 3mi.w. Paradise Chiricahua Mts., [31º55´N, 109º22´W], elev. [1989m], 9.ix.1950, W. J. Gertsch leg., 1♀ (AMNH); SWRS 5 mi. W. Portal Cochise County, [31º53´N, 109º12´W], elev. [1645m], 17.vii.1964, J. A. Woods leg., 1♀ (AMNH); Santa Rita Mts., Madera Canyon, [31º43´N, 110º52´W], elev. [1552m], 16.vii.1940, W. J. Gertsch leg., 1♀ (AMNH); Cochise Co., Chiricahua Mts. SWRS, [31º49´N, 109º28´W], elev. [1700m], 14.vii.1966, J. Beatty leg., (under rock in dry stream), 2♀ (MCZ 64709); Madera Can. Santa Rita Mts., 31º43´N, 110º52´W, elev. [2100m], 8.ix.1941, W. Ivie leg., 3♀ 2♂ (MCZ 125499); 1♂ (MCZ 125500). New Mexico: Whitewater Canyon 4 mi. N. E. Glenwood Catron Co., [33º21´N, 108º3´W], elev. [2050m], 20.viii.1952, H. R. Leech & J. W. Green leg., 1♂ (AMNH).
description: Published as part of Jimmy Cabra-García & Antonio D. Brescovit, 2016, Revision and phylogenetic analysis of the orb-weaving spider genus Glenognatha Simon, 1887 (Araneae, Tetragnathidae), pp. 1-183 in Zootaxa 4069 (1) on pages 153-158, DOI: 10.11646/zootaxa.4069.1.1, http://zenodo.org/record/1054149