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

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. 9–13View FIGURE 9View FIGURE 10View FIGURE 11View FIGURE 12View FIGURE 13, 130View 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 41270View MaterialsGoogleMaps  ; Paratypes: 4♂ 1♀ same data as the holotype, deposited in MZSP 42538View MaterialsGoogleMaps  ; 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. 11HView FIGURE 11) and the embolic medial groove confined to the inner surface of the embolus ( Fig. 13BView 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. 11BView FIGURE 11, 13 AView FIGURE 13). Females resemble those of G. lacteovittata  and G. florezi  by the median projection of the uterus externus ( Fig. 12 AView FIGURE 12); distinguished from the former by the presence of one posterior bulge on the cheliceral basal segment ( Figs. 9EView FIGURE 9, 10FView 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. 10FView FIGURE 10).

Male (holotype). Habitus as in Figures 9 A –CView 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 –CView FIGURE 10). CFO present ( Fig. 10 AView 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 –EView FIGURE 13. AG-FL triplet absent ( Fig. 13EView FIGURE 13). Palp as in Figures 11E –HView FIGURE 11. Paracymbium with short distal portion ( Fig. 11HView FIGURE 11). Conductor lamina sinuous without distal prolaterally oriented fold ( Figs. 11BView FIGURE 11, 13 AView FIGURE 13). Embolus smooth without projections ( Figs. 13B –CView FIGURE 13). Embolus medial groove limited to the inner surface, as seen in ventral view ( Figs. 11 AView FIGURE 11, 13 AView FIGURE 13).

Female (paratype MZSP 41270). Coloration and general habitus as in male ( Figs. 9E –GView 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 –FView FIGURE 10) and three teeth on each margin on right chelicera. Basal segment of the chelicerae with a distinct posterior bulge ( Figs. 9EView FIGURE 9, 10FView 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 –FView FIGURE 12. Genitalia without spermathecae ( Figs. 12 A –BView FIGURE 12). UE with a median projection ( Fig. 12 AView 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. 130View 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 11062View 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 39043View 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