Diadiplosis, Felt, 1911

Urso-Guimarães, Maria Virgínia, Cruz, Maiara Alexandre, Martinelli, Nilza Maria & Peronti, Ana Lúcia Gonzalez Benfatti, 2020, Description of a new species of cecidomyiid (Diptera: Cecidomyiidae) predator of mealybugs (Hemiptera: Pseudococcidae) on sugarcane, Papéis Avulsos de Zoologia (Pap. Avulsos Zool., S. Paulo) 60, pp. 1-6 : 5

Key to adult males of Diadiplosis distributed in Brazil (Modified of Culik & Ventura, 2013b)

1. Maxillary palp 3-segmented,aedeagus cylindrical....................................................................................................................................................................... 2

1’. Maxillary palp 4-segmented,aedeagus triangular ....................................................................................................................................................................... 4

2. Aedeagus longer than cercus and hypoproct,aedeagus bulbous ( Fig. 4A )............................................................................... Diadiplosis abacaxii Culik& Ventura

2’. Aedeagus approximately equal in length to hypoproct,aedeagus not bulbous ( Fig.4B ) .............................................................................................................. 3

3. Cercus,hypoproct and aedeagus equal in length,hypoproct shallowly bilobed ( Fig.4B )........................................................................... Diadiplosis multifila Felt

3’. Hypoproct and aedeagus larger and longer than cerci,hypoproct deeply bilobed ( Fig.4C )....................................................... Diadiplosis jamboi Culik& Ventura

4. Claws of legs 2 and 3 simple......................................................................................................................................................................................................... 5

4’. Claws of legs 2 and 3 dentate ....................................................................................................................................................................................................... 6

5. Hypoproct unilobed;aedeagus shorter than hypoproct and cerci,dorso-lateral distal margin of gonocoxite without prolongation ( Fig.4D ) ................................ ......................................................................................................................................................................................................... Diadiplosis coccidivora (Felt)

5’. Hypoproct deeply bilobed,aedeagus longer than hypoproct and cerci,dorso-lateral distal margin of gonocoxite with a long and narrow prolongation ( Fig.4E ) .......................................................................................................................................................................................................... Diadiplosis pseudococci Felt

6. Aedeagus shorter than hypoproct ( Fig. 4F )....................................................................................................................... Diadiplosis martinsensis Culik& Ventura

6’. Aedeagus much longer than hypoproct ( Fig.4G ).......................................................................................................................................................................... 7

7. Gonostylus clavate and curved,dorso-lateral distal margin of gonocoxite without prolongation ( Fig.4G )............................. Diadiplosis bellingeri Culik& Ventura

7’. Gonostylus rectangular and stout,dorso-lateral distal margin of gonocoxite with prolongation after insertion of gonostyle ( Fig.2B ).......................................... ...................................................................................................................................................................................................... Diadiplosis saccharum sp.nov.

Figures

Figure 2. Diadiplosis saccharum sp. nov. (A) Male terminalia and posterior abdominal segments, vview; (B) Detailed male terminalia, dorsal view; (C) Female post-abdomen;(D) Female abdomen detailed.Abbreviations:ae = aedeagus,ce = cercus,gc = gonocoxites,gs = gonostylus,hy = hypoproct,sg8 = segment8.

Figure 4. Male terminaliaof Diadiplosis species.(A) D.abacaxii, (B) D.multifila,(C)D.jamboi,(D)D.coccidivora,(E)D.pseudococci,(F) D.martinsensis,(G) D.bellingeri. Illustrations B,D and E modified from Harris (1968);and C and F modified from Culik & Ventura (2013b).