Cyrtognatha eberhardi, Dimitrov & Hormiga, 2009

Dimitrov, Dimitar & Hormiga, Gustavo, 2009, Revision And Cladistic Analysis Of The Orbweaving Spider Genus Cyrtognatha Keyserling, 1881 (Araneae, Tetragnathidae), Bulletin of the American Museum of Natural History 2009 (317), pp. 1-140 : 37-40

Cyrtognatha eberhardi , new species Figure 10

TYPE: Male holotype from Brazil, São Paulo, Fazenda Intervales, 15 km E of Guapiara, 700 m. xi.1990, W. Eberhard ( MCZ 67457).

ETYMOLOGY: Named after William G. Eberhard, collector of many undescribed araneoid species, including the only known specimen of this species. The species name is a noun in the genitive case.

DIAGNOSIS: As in C. atopica , a very large part of the embolus is free and the metine embolic apophysis is long and laminar. These two characteristics clearly differentiate C. eberhardi from most species in the genus. The only species that has a similarly shaped metine embolic apophysis is C. atopica . C. eberhardi can be easily distinguished from the latter species by its more elongated paracymbium tip, the S-shaped tip of the embolus, and the shape of the basal apophysis of the conductor (which in C. atopica has a long and sharpened apophysis that is absent in C. eberhardi ). It is further differentiated from C. atopica by the presence of a short membranous ridge on the base of the embolus (fig. 10C).

DESCRIPTION: Male (holotype). Habitus as in figure 10D–G. Carapace yellowish with dark brown edges. Fovea well marked, dark brown. Abdomen cylindrical with numerous guanine spots concentrated over its dorsal and lateral surfaces and a dorsal line running longitudinally, with several small ramifications without guanine. Ventrally almost without guanine spots. Proximal and distal abdominal tubercles well developed and oriented longitudinally. Total length 5.89. Cephalothorax 2.17 long, 1.50 wide, 0.87 high. Abdomen 3.72 long, 1.19 wide, 1.24 high. Sternum yellow-brownish with darker brownish pigmentation in the center and

darker edges; 0.86 long, 0.80 wide. Clypeus height twice one AME diameter. Diameter of the AME 0.16. Distance between AME slightly less than their diameter; between AME and ALE 1.5 times one AME diameter. Distance between PME about one PME diameter, PME–AME distance equal to one AME diameter. The lateral eyes juxtaposed and surrounded by a darker pigmentation. PME also surrounded by darker colored areas. AME slightly larger than the rest of the eyes and surrounded by slightly pigment- ed area. Chelicerae (fig. 10E) dark brown, very divergent, and with very well-developed dorsal cheliceral tooth. Dorsal tooth clearly outlying from the joint of the fang and curved at the tip prolaterally. Femur I 4.77, 2.1 times the length of the cephalothorax. Pedipalp as in figure 10A–C. Palpal tibia length 0.35; cymbium length 1.10.

Female. Unknown.

DISTRIBUTION: Known only from the type locality (fig. 5).