Erioloides acutidentis Naskrecki and Cohn

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, : 91

Erioloides acutidentis Naskrecki and Cohn , n. sp.

Figs. 22 F-G, 23C, 23H, 50C, Map15

Type locality: Costa Rica, Puntarenas Prov., Estac. Pittier; type depository: Academy of Natural Sciences, Philadelphia – holotype male

Diagnostic description.— Very similar to the previous species; fastigium of vertex more pointed than in other species of the genus ( Fig. 23 H). Male stridulatory file straight, 1.0 mm long, 103 μm wide, with 179 closely spaced and very wide, lamelliform teeth; teeth in proximal half of file thinner and more closely arranged than in distal part ( Fig. 50 C); mirror elongately rectangular, distinctly longer than wide; secondary veinlet next to AA 1 well developed, strongly divergent from AA 1; stridulatory area of left wing devoid of secondary venation.

Male 10th tergite with small, narrow incision on posterior margin ( Fig. 22 F). Male cercus relatively slender, cylindrical, with small, spur-like dorsal spine; apex of cercus blunt ( Fig. 22 F-G). Female cercus simple, elongately conical, distinctly curved. Titillators not clearly differentiated from phallic membrane, squamose ( Fig. 23 C). Male subgenital plate with distinct ventral keel and deep triangular incision apically; female subgenital plate broadly triangular, with small, triangular incision at apex. Ovipositor relatively slender, with irregular lamella along midline of upper valvula; ratio ovipositor/hind femur 0.81.

Coloration.— General coloration light green. Face pale green, mandibles brightly emerald green, labrum dark brown. Tegmina green, with contrastingly yellow venation. Legs green; abdomen light green dorsally; purple ventrally; ovipositor light brown, with darker apex.

Measurements.— Table 15 .

Distribution.— So far, this species is known from only a one locality in southern Puntarenas Prov. ( Map 15 ).

Material examined.— COSTA RICA: Puntarenas Prov., Estac. Pittier, elev. 1670 m, 23 August - 13 September 1995 (coll. E. Navarro) - 1 female (allotype) (ANSP); same locality, 26 September - 5 October 1995 (coll. E. Navarro) - 1 male (holotype) (ANSP).

Etymology.— The specific epithet refers to the sharp, spur-like spine on the male cercus.

Figures

FIG. 22. Costa Rican species of Erioloides. A. E. consobrinus - female, habitus, B. E. longinoi - male cerci, dorsal view, C. E. longinoi - male left cercus, lateral view, D. E. consobrinus - male cerci, dorsal view, E. E. consobrinus - male left cercus, lateral view, F. E. acutidentis - male cerci, dorsal view, G. E. acutidentis - male left cercus, lateral view, H. E. sikesi - male cerci, dorsal view, I. E. sikesi - male left cercus, lateral view, J. E. latiscobinus - male cerci, dorsal view, K. E. latiscobinus - male left cercus, lateral view.

FIG. 23. Costa Rican species of Erioloides. A-E. titillators, dorsal views: A. E. longinoi, B. E. consobrinus, C. E. acutidentis, D. E. sikesi, E. E. latiscobinus, F. E. longinoi - male face, G. E. longinoi - male head and pronotu, dorsal view, H. E. acutidentis - male head and pronotum, dorsal view.

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.