Cohnia, Buzzetti & Fontana & Carotti, 2010

Buzzetti, F. M., Fontana, P. & Carotti, G., 2010, Bioacoustic of Cohnia andeana (Hebard, 1924) comb. nov. (Insecta: Orthoptera: Tettigoniidae), Zootaxa 2661 (1), pp. 59-68 : 61

Cohnia g. nov.

Type species: Cohnia andeana ( Hebard, 1924) comb. nov.

Cohnia andeana ( Hebard, 1924) comb. nov. ( Fig. 1 ) was described as Dichopetala from Loja, Ecuador. Since its description C. andeana has been no more collected and it was only mentioned by Rehn (1955); being to date known only for type material and from type locality.

C. andeana was finally collected in two recent expeditions in the neighborhood of Loja, in the village of Catamayo, Southern Ecuador ( Fig. 2 ).

Diagnosis: Pronotum ( Fig. 5–8 ) of both sexes with typical sulcus behind the second third and consequently metazona long less than half of prozona, without humeral sinus. Male cerci ( Fig. 9, 11–13 ) simply tapering to the apex, curved inward in the distal third. Male titillators ( Fig. 18–19 ) toothless and well sclerotized. Genicular lobes unarmed. Female subgenital plate ( Fig. 21, 24 ) entire, subhexagonal, apically truncated and longitudinally carinated in the middle. Ovipositor ( Fig. 15 ) regularly upward curved in its middle portion with distal half coarsely serrulated.

Derivatio nominis: Named after Theodore J. Cohn of Ann Arbour University in USA, who inspired our investigations and allowed us to have a wide overview on the genus Dichopetala .

Distribution: Known for type locality and surroundings in Ecuador. Adopting the biogeographic arrangement of Latin America by Morrone (2006), the genus is Neotropical occurring in the Nortwestern Southamerican Dominio.

Figures

FIGURES 1–2. Cohnia andeana (Hebard, 1924). 1: male from Catamayo; 2: habitat of C. andeana in locality Catamayo (Ecuador).

FIGURES 3–8. Cohnia andeana (Hebard, 1924). 3: male lateral view; 4: female lateral view; 5: male pronotum lateral view; 6: male pronotum dorsal view; 7: female pronotum lateral view; 8: female pronotum dorsal view.

FIGURES 9–20. Cohnia andeana (Hebard, 1924). 9: male abdomen tip dorsal; 10: male subgenital plate; 11: male cercus dorsal; 12: male cercus lateral; 13: male cercus tip; 14: female epiproct and cerci; 15: female ovipositor lateral; 16: male abdomen tip dorsal, treated with KOH; 17: female subgenital plate treated with KOH; 18: male titillators dorsal; 19: male titillators lateral; 20: male stridulatory file.

FIGURES 21–29. 21, 24, 27. Cohnia andeana (Hebard, 1924) female subgenital plate, idem treated with KOH, male abdomen tip dorsal; 22, 25, 28: Dichopetala mexicana Brunner von Wattenwyl, 1878 female subgenital plate, idem treated with KOH, male abdomen tip dorsal; 23, 26, 29: Dichopetala serrifera Rehn & Hebard, 1914 female subgenital plate, idem treated with KOH, male abdomen tip dorsal.