Tetradiplosis

Martínez, Juan José, Corró-Molas, Bárbara & Alfonso, Graciela L., 2013, New species of Tetradiplosis (Diptera: Cecidomyiidae) inducing galls on Prosopis caldenia (Fabaceae) in Argentina, Zootaxa 3702 (6), pp. 587-596 : 595

Key to known species of Tetradiplosis .

1. Occiput without a distinguishable protuberance ( Fig. 16 ); pupa with a row of spines on abdominal tergites ( Fig. 25 ), antennal horns bidentate ( Fig. 24 ); larval spatula with a massive transverse anterior area bearing four teeth, and with two lateral projec- tions ( Fig. 26 ); gall inducing species on the rachis of Prosopis inflorescences ( Fig. 28 ), larvae gregarious in a single chambered gall ( Fig. 30 )............................................................................ T. rayen Martínez

- Occiput with a distinct protuberance ( Fig. 1 ); pupa without an apical row of spines on abdominal tergites, antennal horns sim- ple ( Fig. 9 ); larval spatula bearing two lobes anteriorly, each one with 2–3 teeth on its inner margin ( Fig. 10 ); gall inducing spe- cies on vegetative stems of Prosopis ( Fig. 13 ); larvae in individual chambers in a multilocular gall ( Fig. 14 ). Adults not currently distinguishable beyond this point................................................................. 2

2. Spatula of the mature larva with six teeth, three on each lateral lobe; pupa with a conical projection on mesoscutum; species inducing stem galls on Prosopis alpataco ........................................ T. sexdentata Kieffer & Jörgensen

- Spatula of mature larva with five teeth ( Fig. 10 ), rarely four, two on each lateral lobe and in most cases with a median tooth between them; pupa with mesoscutum entirely smooth; species inducing stem galls on Prosopis caldenia .................................................................................................. T. panghitruz Martínez

Figures

FIGURES 16 – 20. Tetradiplosis rayen. 16, head frontal; 17, male third antennal flagellomere; 18, female third flagellomere; 19, wing; 20, tarsal claw, empodium, and pulvillus of hind leg.

FIGURES 21 – 27. Tetradiplosis rayen. 21, male genitalia, dorsal; 22, abdomen of female, lateral; 23, female terminalia, lateral; 24, pupal antennal horns; 25, pupal abdominal tergites, lateral; 26, larval spatula and associated papillae, ventral; 27, larval terminal segments, dorsal.

FIGURES 28 – 30. 28 external morphology of galls induced by T. rayen; 29, detail of the subapical exit hole; 30, immature larvae of T. rayen inside the gall.

FIGURES 1 – 5. Tetradiplosis panghitruz. 1, head frontal; 2, male third antennal flagellomere; 3, female third flagellomere; 4, wing; 5, tarsal claw, empodium, and pulvillus of hind leg.

FIGURES 6 – 11. Tetradiplosis panghitruz. 6, male genitalia, dorsal 7, abdomen of female, lateral; 8, female terminalia, lateral; 9, pupal antennal horns; 10, larval spatula and associated papillae, ventral; 11, larval terminal segments, dorsal.

FIGURES 12 – 15. 12, Prosopis caldenia; 13, external morphology of galls induced by T. panghitruz; 14 longitudinal and transversal sections of galls induced by T. panghitruz; 15, mature larva of T. panghitruz inside the gall.