Glaphyrosoma gracile Brunner von Wattenwyl, 1888

Cadena-Castañeda, Oscar J. & Weissman, David B., 2020, Review of Glaphyrosoma (Orthoptera: Stenopelmatoidea: Anostostomatidae) including new species and biological information, Zootaxa 4779 (1), pp. 1-37: 25

publication ID

publication LSID


persistent identifier

treatment provided by


scientific name

Glaphyrosoma gracile Brunner von Wattenwyl, 1888


Glaphyrosoma gracile Brunner von Wattenwyl, 1888  

( Figures 18–20 View FIGURE 18 View FIGURE 19 View FIGURE 20 , Map 3) Orthoptera

Specimens examined. 2♂ 4♂ subadult 1♀. Mexico, Veracruz, Metlac Canyon of Río Metlac , 18°54’ 23.87’’N– 97°00’46.31’’W. 850 m; 20 June 2006; DBW stop # 06-39. D.B. Weissman, D.C. Lightfoot. (1♂: S06-39, CASENT 9077082), (1♀. S06-39, F1793, CASENT 9077083), (4♂ subadults, S06-39, T06-4, CASENT 9077078, used for the dissection of testes) ( CAS), (1♂: S06-39, F1912, CASENT 8413905) GoogleMaps   (CAUD).

Redescription. Male. Large for genus, shiny, and relatively uniformly colored ( Fig. 18A View FIGURE 18 ): head and majority of tergites dark brown but with lower half of epicranium, most part of mouthparts, scape, pedicel, ventrolateral parts of tergites from pronotum to subapical tergite, and apical tenth abdominal tergite light brown, as well as with all ocelli and all palpi yellowish ( Figs. 18B, C, D View FIGURE 18 ); rest of body from light brown to yellowish, with somewhat darkened (almost brown) small areas near femur-tibia articulations as well as subapical third of hind femur. Head ovoid with rather short and wide rostrum, and almost 1.5 times as wide as space between antennal cavities; latter space almost two times as wide as scape; ocelli round, almost equal to each other in size, and two times wider than pedicel ( Fig. 18B View FIGURE 18 ). Both tympana present, the outer tympanum is small than the inner one. Mid tibia armed with three ventral spines on each side and apex armed with two distal spines on each side. Hind femur with three transverse main peg rows with few spinules (in comparison to other species), on inner side near to base ( Fig. 18E View FIGURE 18 ). Hind tibia with nine spines on dorso-outer and dorso-inner margin. First two abdominal tergites with stridulation pegs denser on first lateral tergite than the second one, these pegs are small and irregularly distributed ( Fig. 18D View FIGURE 18 ). Posterior edge of the ninth tergite incurved on the hooks of the last tergite ( Fig. 18F View FIGURE 18 ); tenth tergite narrower and covered by the ninth one, divided in the middle, into thin plate, with dorso-medial margin armed with two thickened and conspicuous hooks ( Figs. 18G, H View FIGURE 18 ). Epiproct with barely angular posterior edge; each paraproct is longer, distinctly S-shaped in the profile, with a rather narrow and almost finger-like distal half, with clearly membranous lateral area, and with small ventrolateral spinule located before the distal curvature ( Fig. 18I View FIGURE 18 ). Subgenital plate wider than long, with cylindrical styles, and with distinct U-shaped posteromedian notch ( Fig. 18J View FIGURE 18 ).

Female. Similar to the male in shape and coloration ( Figs. 19A, B, C View FIGURE 19 ). Hind femur with two transverse main rows of pegs on inner side near to base ( Fig. 19D View FIGURE 19 ). Tenth tergite rounded, narrow and undivided; ovoid epiproct; paraprocts ovoid without specialization. Subgenital plate triangular, without distal spine, apical part which is almost truncate or having a very small apical notch ( Fig. 19E View FIGURE 19 ). Ovipositor 0.7 times as long as the hind femur, up-curved, and with a sharp apex, valves without denticulations or depressions in the margins ( Fig. 19F View FIGURE 19 ).

Variation. Our male differs from the specimens studied by Gorochov & Cadena-Castañeda (2016) and the lectotype, in that the distal portion of the S-shaped paraproct, is shorter and obliquely truncated. We believe this is an intraspecific variation. In all other morphological characters, our male agrees with the other specimens.

Measurements (in mm.). Male / Female: LB: 25–34/29–35. Pr: 6–8.5/6.5–9. HF: 17–24/18–26. HT: 18– 22/18–23. Ov: 9–11. Included here are the range of measurements of the specimens studied by us and those studied by Gorochov & Cadena-Castañeda, 2016.

Habitat. Open riparian forest.

Drum. Unknown.

Karyotype. T 06- 4. 2n ♂ = 29. The largest pair of autosomes are metacentric while autosomal pairs 2 through 14 are all rod shaped. The largest chromosome is the single metacentric X ( Fig. 20 View FIGURE 20 )   .

DNA. F1793 mapped closest (Vandergast pers. comm. to DBW) to F1792, which is G. paragracile   , but F1793 was not included in Vandergast et al. (2017) because it was not recognized as distinct.

Comparison. The males of this species are the only ones in the genus to have elongated and S-shaped paraprocts. According to Gorochov & Cadena-Castañeda (2016), G. gracile   is very similar to G. bulbosum   in size, coloration and body structure.


California Academy of Sciences


Tavera, Department of Geology and Geophysics