Eriolus aculeus Naskrecki

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, : 117

Eriolus aculeus Naskrecki , sp. n.

Figs. 30 A-F, 50E, Map 16

Type locality: Costa Rica: Puntarenas Prov., Osa

Peninsula, Rincón; type depository: Academy of Natural Sciences, Philadelphia – holotype male

Diagnostic description.— Body small, with wings in both sexes extending beyond apices of hind femora by less than half of their length ( Fig. 30 A). Fastigium of vertex conical, with well developed ventral keel, as long as 1.5 eye diameter ( Fig. 30 B-C). Prosternum armed with two thin, widely separated processes. Male stridulatory file weakly sinusoidal, 1.3 mm long, 100 μm wide, with 179 closely spaced and relatively narrow teeth ( Fig. 50 E); stridulatory area on male wings strongly projecting, approximately triangular in shape; mirror triangular; secondary veinlet next to AA 1 present, parallel; stridulatory area of left wing devoid of secondary venation.

Tenth tergite in both sexes with two parallel, long and narrow, apically rounded lobes; male cercus about twice as long as thick, with large, oblique, apical arm bent inwards; apex of arm with small ventral tooth ( Fig. 30 D); female cercus simple, elongately conical, somewhat curved. Male titillators shaped as long, thin, curved needles, their basal parts in a sheath of phallic membrane ( Figs. 30 E-F). Male subgenital plate with small apical incision and long styli; female subgenital plate approximately triangular, with small incision on its hind margin. Ovipositor long, saber-shaped, distinctly longer than half of hind femur (ratio ovipositor/hind femur 0.62-0.74) ( Fig. 30 A).

Coloration.— General coloration light green; clypeus and mandibles green; pronotum in both sexes with two thin, yellow stripes on dorsal edges of pronotum; posterior edge of metazona in male without additional markings.

Measurements.— Table 23 .

Distribution.— This species has been collected only from Osa Peninsula in Costa Rica ( Map 16 ).

Material examined.— COSTA RICA: Puntarenas Prov., Corcovado N. P., Península de Osa, 5 - 11 August 1979 (coll. D.H. Janzen) - 1 female (paratype) ( INBio); Osa Peninsula, 3-20 mi S Rincón, 7 - 20 February 1967 (coll. H.R. Roberts et al.) - 1 male (paratype); Osa Peninsula, 3- 10 mi. S Rincón, 7 - 20 February 1967 (coll. H.R. and E.H. Roberts, M.S. Harrison, W.W. Moss, D.A. Nickle) - 1 male, 1 female (paratypes) ( ANSP); Península de Osa, 3.5 mi. S Rincón, 8° 42' N, 83° 29' W, 12 March 1969 (coll. D.C.F. Rentz) - 1 female (paratype) ( ANIC); Rincón, Osa Peninsula, at night near air strip, 25 February 1966 (coll. H.R.

Roberts) - 1 female (allotype) ( ANSP); Rincón, Osa Peninsula, insecticide in forest, 6 mi. S, 27 February 1966 (coll. H.R. Roberts) - 3 males (holotype, paratypes) ( ANSP); PANAMA: 22 July 1976 - 1 male (paratype) ( USNM).

Figures

FIG. 30. Eriolus aculeus. A. female - habitus, B. female face, C. female head and pronotum, dorsal view, D. male cerci, dorsal and posterior views, E. epiphallus, posterior and lateral views, F. titillators.

FIG. 50. Stridulatory files of Costa Rican species of Conocephalinae s. l. A. Erioloides longinoi, C. Erioloides sikesi, C. Erioloides acutidentis, D. Eriolus duplidentis, E. Eriolus aculeus, F. Eriolus penicillus, G. Subria scutellaris, H. Subria crassicerca.

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.