Glenognatha boraceia, 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: 21-25

publication ID

http://doi.org/10.11646/zootaxa.4069.1.1

publication LSID

lsid:zoobank.org:pub:52FC658C-78C7-49FC-9961-8AC43CA03101

DOI

http://doi.org/10.5281/zenodo.5666926

persistent identifier

http://treatment.plazi.org/id/8E0E8F67-7D06-FF90-ACBA-0CDDFDCFD6FA

treatment provided by

Plazi

scientific name

Glenognatha boraceia
status

new species

Glenognatha boraceia   new species

( Figs. 9–13 View FIGURE 9 View FIGURE 10 View FIGURE 11 View FIGURE 12 View FIGURE 13 , 130 View FIGURE 130 )

Types. Male holotype from Estação Biológica Boracéia , Salesópolis, São Paulo, Brazil, 23º39´20.6´´S, 45º53´28.6´´W, elev. [900m], 1.iv.2001, S.T.P. Amarante e Equipe leg., deposited in MZSP 41270 View Materials GoogleMaps   ; Paratypes: 4♂ 1♀ same data as the holotype, deposited in MZSP 42538 View Materials GoogleMaps   ; 1♂ from the type locality, 9.v.2003, G. R. S. Ruiz leg., deposited in IBSP 38325.

Etymology. The species epithet is a noun in apposition taken from the type locality.

Diagnosis. Males of Glenognatha boraceia   resemble those of G. lacteovittata   and G. florezi   by the short distal portion of the paracymbium ( Fig. 11H View FIGURE 11 ) and the embolic medial groove confined to the inner surface of the embolus ( Fig. 13B View FIGURE 13 ). It can be distinguished from the two latter species by the absence of a prolaterally oriented distal fold on the conductor lamina ( Figs. 11B View FIGURE 11 , 13 A View FIGURE 13 ). Females resemble those of G. lacteovittata   and G. florezi   by the median projection of the uterus externus ( Fig. 12 A View FIGURE 12 ); distinguished from the former by the presence of one posterior bulge on the cheliceral basal segment ( Figs. 9E View FIGURE 9 , 10F View FIGURE 10 ) and from the latter by the position of the posterior bulge, which is located at the level of Ret2 and Ret 3 in mesal view ( Fig. 10F View FIGURE 10 ).

Male (holotype). Habitus as in Figures 9 A –C View FIGURE 9 . Carapace yellow-brownish, darker along furrows. Sternum dusky yellow-brownish with darker edges. Abdomen oval, strongly depigmentated, dorsally with two diffused black patches at posterior region. Silver guanine spots absent. Ventrally with diffused black areas posterior to the tracheal spiracle. Legs light yellow-brownish. Total length 2.00. Cephalothorax 1.02 long, 0.80 wide, 0.62 high. Abdomen 1.00 long, 0.80 wide, 0.80 high. Sternum 0.50 long, 0.55 wide. Eye diameters and interdistances: AME 0.07. ALE 0.06. PME 0.09. PLE 0.04. AME-AME 0.04, AME-ALE 0.06, PME-PME 0.10, PME-PLE 0.09, ALE- PLE 0.01. Clypeus height 2.67. Chelicerae divergent, with the same coloration of the cephalothorax. Three promarginal and four retromarginal teeth ( Figs. 10 A –C View FIGURE 10 ). CFO present ( Fig. 10 A View FIGURE 10 ). Leg measurements: I: femur 1.57, patella 0.30, tibia 1.55, metatarsus 1.32, tarsus 0.57, total 5.32; II: 1.45, 0.27, 1.50, 1.25, 0.55, 5.02; III: 0.95, 0.25, 0.75, 0.75, 0.42, 3.12; IV: 1.22, 0.27, 1.05, 0.97, 0.50, 4.02. DTS 0.11. DTE 0.55. Spinnerets as in Figures 13D–E View FIGURE 13 . AG-FL triplet absent ( Fig. 13E View FIGURE 13 ). Palp as in Figures 11E–H View FIGURE 11 . Paracymbium with short distal portion ( Fig. 11H View FIGURE 11 ). Conductor lamina sinuous without distal prolaterally oriented fold ( Figs. 11B View FIGURE 11 , 13 A View FIGURE 13 ). Embolus smooth without projections ( Figs. 13B–C View FIGURE 13 ). Embolus medial groove limited to the inner surface, as seen in ventral view ( Figs. 11 A View FIGURE 11 , 13 A View FIGURE 13 ).

Female (paratype MZSP 41270). Coloration and general habitus as in male ( Figs. 9E–G View FIGURE 9 ). Abdomen with scattered silver guanine spots dorsally along the median region and in the lateral surfaces. Venter with diffused greyish patches between the spinnerets and the tracheal spiracle. Total length 2.62. Cephalothorax 1.05 long, 0.80 wide, 0.70 high. Abdomen 1.47 long, 1.28 wide, 1.25 high. Sternum 0.5 long, 0.55 wide. Eye diameters and interdistances: AME 0.07. ALE 0.05. PME 0.09. PLE 0.06. AME-AME 0.06, AME-ALE 0.05, PME-PME 0.11, PME-PLE 0.07, ALE-PLE 0.01. Clypeus height 2.10. Chelicerae with the same coloration of the cephalothorax, with three promarginal and four retromarginal teeth on left chelicera ( Figs. 10D–F View FIGURE 10 ) and three teeth on each margin on right chelicera. Basal segment of the chelicerae with a distinct posterior bulge ( Figs. 9E View FIGURE 9 , 10F View FIGURE 10 ). Leg measurements: I: femur 1.50, patella 0.35, tibia 1.40, metatarsus 1.20, tarsus 0.55, total 5.00; II: 1.42, 0.32, 1.35, 1.15, 0.67, 4.92; III: 1.00, 0.25, 0.65, 0.77, 0.42, 3.10; IV: 1.27, 0.25, 1.05, 1.02, 0.47, 4.07. DTS 0.20. DTE 0.77. Tracheal system as Figures 12C–F View FIGURE 12 . Genitalia without spermathecae ( Figs. 12 A –B View FIGURE 12 ). UE with a median projection ( Fig. 12 A View FIGURE 12 ).

Variation. Male total length 1.7–2.0 (N = 10; average 1.9), cephalothorax length 0.8–1.2 (N = 10; average 0.9), femur I length 1.3–1.6 (N = 10; average 1.5). Female total length 2.1–2.6 (N = 3; average 2.2), cephalothorax length 0.7–1.0 (N = 3; average 0.9), femur I length 1.3–1.5 (N = 3; average 1.4).

Distribution. Known only from the type locality in southeastern Brazil ( Fig. 130 View FIGURE 130 ).

Additional material examined (N = 13). BRAZIL: São Paulo: Salesópolis, Estação Biológica Boracéia [23º39´S, 45º33´W], elev. [900m], 22–23.ii.1961, P. Biasi leg., 1♂ ( MZSP 11062 View Materials ) GoogleMaps   ; 1.ii.1961, K. Lenko leg., 1♂ (MZSP 11551); 23º39´5.8´´S, 45º33´44.6´´W, 1.iv.2001 (sweeping net), 1♀ (MZSP 39047); Trilha dos Pilões , 23º39´1.9´´S, 45º53´36´´W, 4.iv.2001, (sweeping net), 2♂ 1♀ ( MZSP 39043 View Materials ) GoogleMaps   ; 23º39´5.5´´S, 45º53´42.9´´W, 3– 6.iv.2001, 1♂ (MZSP 39046); 23º39´11´´S, 45º53´57´´W, 1.iv.2001, (sweeping net), 2♂ (MZSP 39044); 23º39´2.9´´S, 45º53´39´´W, 1.iv.2001, (sweeping net), 1 immature (MZSP 41464); 23º39´2.2´´S, 45º53´37´´W, 1– 3.iv.2001, 1 immature (MZSP 39045); 23º39´1.9´´S, 45º53´36´´W, 1.iv.2001, (sweeping net), 2♂ (MZSP 39048), all collected by S.T.P. Amarante e Equipe.

DTE

Centro de Investigaciones Cient�ficas y Transferencia de Tecnolog�a a la Producci�n (CICyTTP-CONICET)

MZSP

Sao Paulo, Museu de Zoologia da Universidade de Sao Paulo