Glenognatha florezi, Cabra-García & Brescovit, 2016

Jimmy Cabra-García & Antonio D. Brescovit, 2016, Revision and phylogenetic analysis of the orb-weaving spider genus Glenognatha Simon, 1887 (Araneae, Tetragnathidae), Zootaxa 4069 (1), pp. 1-183 : 26-31

Glenognatha florezi new species

( Figs. 14–18 , 130 )

Types. Male holotype from Laguna La Herrera , Mosquera, Cundinamarca, Colombia, [4º42´31.1´´N, 74º18´54.2´´W], elev. 2600m, 9.ii.2002, J. Martinez, C. Niño, A. Castañeda, G. Mora leg., deposited in ICN 5976 ; Paratypes: 24 ♂ 14 ♀ same data as the holotype, deposited in ICN 5977 ; 4♂ 4♀ same data as the holotype, deposited in IBSP 163855 .

Etymology. The species epithet is in honor of Dr. Eduardo Flórez Daza (Universidad Nacional de Colombia) for his enormous contributions to Colombian arachnology. The name is a noun in genitive.

Diagnosis. Males of G. florezi resemble those of G. lacteovittata by the distal prolaterally oriented fold of the conductor lamina ( Figs. 16B , 18 A ). They are distinguished from the latter by the absence of filiform projections in the distal portion of the embolus ( Figs. 16D , 18 A –E ). Females resemble those of G. lacteovittata and G. boraceia by the median projection of the uterus externus ( Figs. 17 A –E ); distinguished from the former by the presence of one posterior cheliceral bulge ( Fig. 15F ) and from the latter by the position of the posterior bulge, which is located at the level of Ret3 and Ret4 as seen in mesal view ( Fig. 15F ).

Male (holotype). Habitus as in Figures 14 A –D . Carapace pale brown, darker along sides and median region. Sternum dusky brown. Abdomen oval, dorsally with irregular pattern of two longitudinal black bands that join medially forming thin transverse bands in the posterior region. Silver guanine spots scattered in dorsal and lateral surfaces. Venter with a dusky median band that ramifies towards the lateral surface into thin irregular bands. Legs light yellow-brownish with distal parts of segments darker. Tracheal spiracle well-sclerotized. Total length 3.90. Cephalothorax 1.62 long, 1.27 wide, 1.07 high. Abdomen 2.35 long, 1.87 wide, 1.75 high. Sternum 0.72 long, 0.82 wide. Eye diameters and interdistances: AME 0.11. ALE 0.09. PME 0.11. PLE 0.08. AME-AME 0.08, AME-ALE 0.07, PME-PME 0.10, PME-PLE 0.14, ALE-PLE 0.01. Clypeus height 2.40. Chelicerae with the same coloration of the cephalothorax. Three promarginal and four retromarginal teeth. ( Figs. 15 A –C ). CFO well-developed ( Fig. 15 A ). Leg measurements: I: femur 1.72, patella 0.52, tibia 1.67, metatarsus 1.22, tarsus, total 0.72; II: 1.67, 0.52, 1.60, 1.22, 0.72, 5.75; III: 1.15, 0.40, 0.97, 0.65, 0.52, 3.70; IV: 1.50, 0.45, 1.57, 1.20, 0.70, 5.42. Metatarsus IV with one trichobothrium. DTS 0.27. DTE 0.95. AG-FL triplet absent. Epiandrous fusules as in Figure 18H . Palp as in Figures 16E–H . Paracymbium with short distal portion ( Figs. 16H , 18D ). Conductor lamina with a distal prolaterally oriented fold ( Figs. 16B , 18 A ). Embolus with tooth-like projections ( Fig. 16D ). Medial groove limited to the inner surface ( Fig. 18B ).

Female (paratype ICN 5977). Coloration and general habitus as in male ( Figs. 14E–H ). Abdomen with three longitudinal black bands, one median bifurcated at the anterior region and two laterals. Total length 3.85. Cephalothorax 1.60 long, 1.30 wide, 0.80 high. Abdomen 2.65 long, 2.00 wide, 1.75 high. Sternum 0.80 long, 0.82 wide. Eye diameters and interdistances: AME 0.10. ALE 0.08. PME 0.11. PLE 0.08. AME-AME 0.1, AME-ALE 0.07, PME-PME 0.12, PME-PLE 0.11, ALE-PLE 0.01. Clypeus height 2.20. Chelicerae with the same coloration of the cephalothorax. Three promarginal and four retromarginal teeth ( Figs. 15D–F ). Basal segment of the chelicerae with a distinct posterior bulge ( Figs. 15F ). Leg measurements: femur 1.45, patella 0.55, tibia 1.25, metatarsus 1.07, tarsus 0.57, total 4.90; II: 1.47, 0.50, 1.15, 1.07, 0.65, 4.85; III: 1.07, 0.42, 0.87, 0.60, 0.50, 3.47; IV: 1.50, 0.30, 1.37, 1.07, 0.45, 4.70. Metatarsus IV with one trichobothrium. DTS 0.52. DTE 0.87. Spinnerets as in Figures 17F–H . PMS with four ( Fig. 17G ) to five AC spigots. AG-FL triplet absent ( Fig. 17H ). Tracheal system as in Figure 18E . Genitalia without spermathecae ( Figs. 17 A –E ). UE with a median projection ( Figs. 17D–E ).

Variation. Male total length 3.2–4.1 (N = 10; average 3.6), cephalothorax length 1.5–1.7 (N = 10; average 1.6), femur I length 1.5–1.8 (N = 10; average 1.7). Female total length 3.5–4.2 (N = 10; average 3.8), cephalothorax length 1.5–1.7 (N = 10; average 1.6), femur I length 1.2–1.7 (N = 10; average 1.4).

Distribution. Known only from Cundinamarca and Boyacá states in Colombian central Andes ( Fig. 130 ).

Additional material examined (N = 178). COLOMBIA: Boyacá: Paipa , Laguna de Sochagota, [5º46´1.1´´N, 73º7´36.78´´W], elev. 2500m, 8.vii.2000, V. Rodríguez & E. Flórez leg., 1♂ ( ICN 5102 ) . Cundinamarca: Mosquera, La Herrera , [4º42´31.1´´N, 74º18´54.2´´W], elev. 2600m, 9.ii.2002, J. Martinez, C. Niño , A. Castañeda , G. Mora leg., 43♂ 18♀ 53 immature ( ICN 2 136) ; 43♂ 4♀ 8 immature (ICN 1973); 2♂ 2♀ (IBSP 163856); Mosquera, Corpoica, [4º45´N, 74º20´W], elev. 2600m, v–vi.1997, L. Benavides leg., 2♂ (ICN 4451); Bogotá, Universidad Nacional, Arboretum [4º38´33.77´´N, 74º4´55.09´´W], elev. 2600m, 21.ii.2009, F. Bagon leg., 1♀ ( ICN 5100 ) ; Bogotá, Universidad Nacional, Instituto de Ciencias Naturales [4º38´N, 74º4´W], elev. 2600m, 9.ix.1992, C. Martinez & A. Ordoñez leg., 1♂ ( ICN 6433 ).

Figures

FIGURE 14. Glenognatha florezi new species from Colombia. A – D, male habitus (ICN 1973). A, dorsal. B, lateral. C, ventral. D, frontal. E – H, female habitus (ICN 1973). E, dorsal. F, lateral. G, ventral. H, frontal. Scale bars, 200 µm. TS: posterior tracheal spiracle.

FIGURE 15. Glenognatha florezi new species from Colombia (ICN 2141). A – C, male left chelicerae. A, anterior. B, posterior. C, mesal. D – F, female left chelicerae. D, anterior. E, posterior. F, mesal (arrow, cheliceral bulge). Scale bars, 100 µm. CFO: cheliceral fang outgrowth. Ret: retromarginal tooth.

FIGURE 16. Glenognatha florezi new species from Colombia. A – D, male left palp, schematic (Paratype ICN 2141). A, ventral. B, conductor, ventral. C, conductor, dorsal. D, embolus, ventral (arrow, tooth-like projection). E – H, male left palp (ICN 1973). E, ventral. F, dorsal. G, prolateral. H, retrolateral. Scale bars, 100 µm. C: conductor. CB: cymbium. CRa: conductor retrolateral apophysis. E: embolus. ED: ejaculatory duct. P: paracymbium. T: tegulum. TO: tarsal organ.

FIGURE 17. Glenognatha florezi new species from Colombia. A – E, female genitalia. A, dorsal. B, posterior. C, anterior D, lateral. E, uterus externus, median projection. F – H, female spinnerets. F, ALS. G, PMS. H, PLS. Scale bars, 100 µm (A – E), 50 µm (F), 20 µm (G), 40 µm (H). AC: aciniform gland spigots. CY: cylindrical gland spigot. MAP: major ampullate gland spigot. mAP: minor ampullate gland spigot MC: membranous chamber. UE: uterus externus.

FIGURE 18. Glenognatha florezi new species from Colombia. A – D, male left palp. A, ventral. B, embolus and conductor, prolateral. C, embolus and conductor tip. D, paracymbium. E – G, female tracheal system. E, dorsal. F, median trunk. G, tracheal spiracle, posterior view. H, epiandrous fusules (image by Ligia Benavides). Scale bars, 200 µm (A), 100 µm (B, D, E – F), 20 µm (C, G), 10 µm (H). C: conductor. CRa: conductor retrolateral apophysis. E: embolus. EMg: embolus medial groove. LT: lateral tracheae. MT: median trunks. P: paracymbium. PBP: paracymbium basal portion. T: tegulum. TO: tarsal organ.

FIGURE 130. Distribution of G. boraceia new species, G. lacteovittata and G. florezi new species.