Sphyrometopa atlantica Rentz, 1976

Piotr Naskrecki, 2000, Katydids of Costa Rica / Vol. 1, Systematics and bioacoustics of the cone-head katydids (Orthoptera: Tettigoniidae: Conocephalinae sensu lato)., Philadelphia, PA: The Orthopterists Society at the Academy of Natural Sciences of Philadelphia, : 98

Sphyrometopa atlantica Rentz, 1976

Figs. 25 F, 26B, 37F, 48B-C, 57E-F, Map 13

Rentz, Ent. News 87: 197; type locality: Costa Rica: Heredia Province, Puerto Viejo, Finca La Selva; type depository: Academy of Natural Sciences, Philadelphia – holotype male

1999 Naskrecki and Otte, Illustr. Cat. Orthop. I (CD

ROM) >> paratypes illustrated

Diagnostic description.— General characteristics as described above. Tegmina shortened, reaching 8th or 9th abdominal tergite, narrowly triangular in shape ( Fig. 26 B); hind wings greatly reduced, about as long as 3/4 of tegmina. Stridulatory file of male 1.4 mm long, with 166 lamelliform teeth, maximum width of file 144 μm ( Figs. 48 B-C); teeth of file uniform in thickness, evenly spaced and smoothly narrowing towards proximal end. Mirror of stridulatory apparatus approximately rectangular, with distal margin of mirror convex. Male cercus with dorsal lobe rounded apically and much darker than remainder of cercus ( Fig. 25 F).

Measurements.— Table 17 .

Bioacoustics.— The call of S. atlantica is very similar to that of S. femora , and also consists of a sequence of paired lisps, repeated every 2.2 s at 25°C ( Figs. 57 E-F). Individual lisps last 28.4-36.3 ms, but unlike those of S. femorata they do not contain minor pulse trains. Most of the energy of the call is allocated between 9 and 14 kHz, with the peak near 12.3 kHz. The presence of higher frequency peaks could not be detected due to the constraints imposed by technical limitations of the recording equipment.

Distribution.— S. atlantica is widely distributed in the Atlantic portion of Costa Rica and does not seem to overlap in its distribution with the second species of the genus ( Map 13 ).

Material examined.— COSTA RICA: Cartago Prov., 13 km by road NW Turrialba (0.7 km NW Santa Cruz), 1 October 1961 (coll. Hubbell, Cantrall, Cohn) - 4 males, 3 females ( UMMZ); 2 mi SE Turrialba (grounds of Inst. Interamer. de Sci. Agricolas), 1 - 3 October 1961 (coll. Hubbell, Cantrall, Cohn) - 2 males ( UMMZ); Heredia Prov., La Selva (estate of L. Holdridge), 13 November 1964 (coll. T.H. Hubbell) - 1 female ( UMMZ); Puerto Viejo, La Selva Biological Station, elev. 50 - 150 m, 10° 26' N, 84° 1' W, 15 March 1994 (coll. P. Naskrecki) - 1 female ( PN collection); same locality, 12 October 1995 (coll. P. Naskrecki) - 1 male ( ALAS ); same locality, 30 November 1995 (coll. P. Naskrecki) - 2 males, 2 females ( PN collection); same locality, 13 April - 10 May 1998 (coll. P. Naskrecki) - 2 males ( PN collection); Limón Prov., 7 km W Guápiles at Río Toro Amarillo, 19 August 1964 (coll. S.P. Hubbell) - 1 male ( UMMZ); Estac. Hitoy-Cerere Res. Biol. Hitoy Cerere, Río Cerere, elev. 200 m, 15 November 1993 (coll. G. Carballo) - 1 female ( INBio); La Emilia, near Guápiles, elev. 305 m, 22 August 1923 - 1 female ( ANSP); La Lola (0.5 mi. W Madre de Dios), 2 October 1961 (coll. Hubbell, Cantrall, Cohn) - 9 males, 5 females (Philadelphia, UMMZ); Río Sardinas, R.N.F.S. Barra del Colorado, elev. 10 m, 2 July 1992 (coll. F. Araya) - 1 male ( INBio); Vesta Farm, Estrella Valley, elev. 60 m, 13 September 1923 - 1 male ( UMMZ); San José Prov., La Palma (on saddle between V. Irazu and V. Barva, 13 August 1964 (coll. S.P. Hubbell) - 3 males ( UMMZ).

Figures

FIG. 25. Costa Rican species of Sphyrometopa. A-E. S. femorata: A. female - habitus, B. female face, C. female head and pronotum, dorsal view, D. male cerci, dorsal view, E. male left cercus, lateral view, F. S. atlantica - male left cercus, lateral view.

FIG. 26. Costa Rican species of Sphyrometopa and Moncheca. A. S. femorata - male left tegmen, B. S. atlantica- male left tegmen, C. S. femorata - titillators, everted, D-F. M. pretiosa: D. female head and pronotum, lateral view, E. female head and pronotum, dorsal view, F. male cerci, dorsal view, G. male cerci, lateral view.

FIG. 48. Stridulatory files of Costa Rican species of Conocephalinae s. l. A. Sphyrometopa femorata, C. Sphyrometopa atlantica, C. ditto, enlarged fragment, D. Eppia truncatipennis, enlarged fragment, E. ditto, entire file, F. Caulopsis cuspidata, entire file, G. ditto, enlarged fragment, H. Caulopsis microprora, enlarged fragment, I. ditto, entire file.

FIG. 57. Oscillograms of male airborne calls of Costa Rican species of Conocephalinae s. l. A. Neoconocephalus triops, B. ditto, 0.5 s fragment, C. Eppia truncatipennis (Panama, Gamboa), D. ditto, 0.5 s fragment, E. Sphyrometopa atlantica, F. ditto, 0.5 s fragment, G. Sphyrometopa femorata, 0.5 s fragment.

MAPS 13 - 18. Distribution of species of Conocephalinae s. l. in Costa Rica. 13. Sphyrometopa femorata, S. atlantica, Eppia truncatipennis, 14. Erioloides longipennis, E. macrocephalus, E. longinoi, E. brevipennis, 15. Erioloides, consobrinus, E. acutidentis, E. latiscobinus, E. sikesi, 16. Eriolus aculeus, E. acutipennis, E. duplidentis, E. penicillus, 17. Subria sylvestris, S. crassicerca, S. scutellaris, 18. Podacanthophorus alas, P. nelciae, P. vargasi, P. maylinae.