Progomphus, Selys, 1854

Molineri, Carlos, Rodríguez, José Sebastián, Leiva, Marta & Márquez, Javier Andrés, 2023, Diagnoses and key for the larvae of Progomphus Selys, 1854 from Argentina (Anisoptera: Gomphidae), with first larval descriptions for P. aberrans Belle, 1973 and P. kimminsi Belle, 1973, Zootaxa 5297 (2), pp. 239-259 : 258

publication ID	https://doi.org/ 10.11646/zootaxa.5297.2.4
publication LSID	lsid:zoobank.org:pub:454B72E3-2659-4F3D-9C9A-503DBABEE9CE
DOI	https://doi.org/10.5281/zenodo.7999765
persistent identifier	https://treatment.plazi.org/id/03E22F20-A771-2220-FF1C-F25AFA46FCBC
treatment provided by	Plazi
scientific name	Progomphus
status

Treatment

Key to the larvae of Progomphus View in CoL from Argentina

(four species remain unknown in this stage: P. auropictus , P. australis , P. basistictus and P. costalis ).

1 Last antennomere (the fourth) short, spherical ( Figs. 6a View FIGURE 6 , 11b View FIGURE 11 , 13b View FIGURE 13 ), pro- and mesotibiae with distal spur ( Figs. 6a View FIGURE 6 , 13a View FIGURE 13 ), abdomen with posterolateral spines on S6–9........................................................................ 2

- Last antennomere long (at least longer than antennomere1-2 combined) and slender, cylindrical ( Figs. 2b View FIGURE 2 , 4b View FIGURE 4 , 9b View FIGURE 9 ), pro- and mesotibiae without distal spur ( Figs. 2c View FIGURE 2 , 4c View FIGURE 4 ), abdomen with posterolateral spines at least on S5–9 ( Figs. 1i View FIGURE 1 , 4d View FIGURE 4 , 9a View FIGURE 9 )........ 4

2 Sternum of S8 formed by 3 plates ( Fig. 6c View FIGURE 6 )....................................................... P. joergenseni View in CoL

- Sternum of S8 formed by 5 plates ( Figs. 11d View FIGURE 11 , 13h View FIGURE 13 )........................................................... 3

3 Third antennomere flat and wide, subcircular in shape ( Fig. 11b View FIGURE 11 ), ligula with 14 marginal tubercles ( Fig. 10f View FIGURE 10 )..... P. lepidus View in CoL

- Third antennomer subcylindrical, elongated ( Fig. 13b View FIGURE 13 ), ligula with only 2 median marginal tubercles ( Fig. 12e View FIGURE 12 ).................................................................................................. P. phyllochromus View in CoL

4 Anal pyramid short (epiproct subequal in length to S10, Figs. 4d–e View FIGURE 4 ), posterolateral spine absent on S4 ( Fig. 4d View FIGURE 4 )................................................................................................... P. complicatus View in CoL

- Anal pyramid long and slender (epiproct as long as or longer than S9 and 10 combined, Figs. 2d, 2g –i View FIGURE 2 , 9d–g View FIGURE 9 ), posterolateral spine present on S4 ( Figs. 1i View FIGURE 1 , 8c View FIGURE 8 )......................................................................... 5

5 Small abdominal dorsal tubercles present on S1–9, sometimes very reduced on S5 to 8 ( Figs. 1h View FIGURE 1 , 2d–e View FIGURE 2 ), posterolateral spines on S2–9 ( Figs. 1i View FIGURE 1 , 2d View FIGURE 2 ).......................................................................... P. aberrans View in CoL

- Small abdominal dorsal tubercles present on S1–3 ( Figs. 8a–b View FIGURE 8 , 9c View FIGURE 9 ), posterolateral spines on S4–9 ( Figs. 8c View FIGURE 8 , 9a View FIGURE 9 )... P. kimminsi View in CoL