Platychauliodes Esben-Petersen

Liu, Xingyue, Price, Ben W., Hayashi, Fumio & Yang, Ding, 2011, Revision of the fishfly genus Platychauliodes Esben-Petersen (Megaloptera: Corydalidae) endemic to South Africa, Zootaxa 2909, pp. 1-13 : 2

Genus Platychauliodes Esben-Petersen

Platychauliodes Esben-Petersen, 1924: 155 . Type species: Platychauliodes capensis Barnard, 1931: 175 , subsequent designation by Barnard, 1931: 175.

Generic characters. Adults. Small to medium-sized (male forewing length 19–26 mm). Body generally brown or blackish brown. Antenna filiform, but subserrate in male of P. capensis ( Fig. 7 ); male antenna longer than 2/3 of forewing, female antenna shorter than 1/2 of forewing. Lateral ocelli ( Figs. 7–8 ) widely separated. Wings hyaline, with numerous brownish spots along longitudinal veins of forewings. Rs 4 to 6-branched, straightly directing distad; three crossveins between R1 and Rs; M 2-branched; 1A 2-branched, with posterior branch sinuate; 2A 2- branched, both branches sinuate, with anterior branch connected with stem of 1A by a short crossvein; basal r-m of hindwing usually absent, but if present, long, without additional branch connected to M. Male ninth tergum ( Figs. 16 , 24 , 32 ) subquadrate, medially separated into a pair of hemitergites by a longitudinal incision; ninth sternum ( Figs. 17 , 25 , 33 ) subquadrate, posteriorly with a membranous lobe; tenth tergum ( Figs. 16 , 24 , 32 ) short, laterally with strongly inflated round cercus, ventral portion inflated more or less, bearing spinous setae; tenth sternum ( Figs. 20 , 28 , 36 ) with ventral portion tightly connected to ninth sternum by membrane, median plate bifurcated into a pair of lobes with complicate modifications. Anus ( Figs. 19 , 27 , 35 ) slightly sclerotized ventrad, medially with a broadly rectangular or narrowly pointed sclerotized area. Female eighth sternum ( Figs. 23 , 30 , 39 ) broad, posteriorly with a membranous lobe; ninth gonocoxite ( Figs. 22 , 29 , 38 ) foliate without gonostylus; tenth tergum ( Figs. 22 , 29 , 38 ) short, narrow or stout, with ovoid or rounded cercus.

Larvae. Head and prothorax ( Figs. 12–13 ) blackish brown, smooth, with scattered setae. Antennae ( Fig. 12 ) with distal two segments combined nearly as long as second segment. Except for distal teeth of mandibles on inner margin, left mandible with one long, acutely pointed tooth and three small teeth, right mandible with one similar long tooth but two small teeth ( Fig. 12 ). Labrum and labium ( Figs. 12, 14 ) feebly produced medially. Terminal pair of abdominal spiracles ( Fig. 15 ) produced as short and widely separated tubes.

Figures

FIGURES 7 – 11. Platychauliodes capensis Barnard. 7. Male head, dorsal view; 8. Female head, dorsal view; 9. Mandible, dorsal view; 10. Maxilla, ventral view; 11. Labium, ventral view. Scale bars = 1.0 mm.

FIGURES 16 – 23. Platychauliodes capensis Barnard. 16. Male genitalia, dorsal view; 17. Male genitalia, ventral view; 18. Male genitalia, lateral view; 19. Male genitalia, caudal view; 20. Male tenth sternum, ventral view; 21. Sclerite beneath male anus, ventral view; 22. Female genitalia, lateral view; 23. Female eighth sternum, ventral view. S 8 – 10: eighth to tenth sternum, T 8 - 10: eighth to tenth tergum, Gx 9: ninth gonocoxite, c: cercus, lar: lateral arm, mpl: median plate. Scale bars = 1.0 mm.

FIGURES 24 – 31. Platychauliodes pusillus (McLachlan). 24. Male genitalia, dorsal view; 25. Male genitalia, ventral view; 26. Male genitalia, lateral view; 27. Male genitalia, caudal view. 28. Male tenth sternum, ventral view; 29. Female genitalia, lateral view; 30. Female eighth sternum, ventral view; 31. Female genitalia, dorsal view. Scale bars = 1.0 mm.

FIGURES 32 – 40. Platychauliodes thornei Barnard. 32. Male genitalia, dorsal view; 33. Male genitalia, ventral view; 34. Male genitalia, lateral view; 35. Male genitalia, caudal view; 36. Male tenth sternum, ventral view; 37. Sclerite beneath male anus, ventral view; 38. Female genitalia, lateral view; 39. Female seventh and eighth sternum, ventral view; 40. Female genitalia, dorsal view. Scale bars = 1.0 mm.

FIGURES 12 – 15. Platychauliodes sp., larva. 12. Head and prothorax, dorsal view; 13. Head, ventral view; 14. Labium, ventral view; 15. Eighth abdominal segment, dorsal view. Scale bars = 1.0 mm.