Frankliniella Species

Skarlinsky, Thomas & Funderburk, Joe, 2016, A key to some Frankliniella (Thysanoptera: Thripidae) larvae found in Florida with descriptions of the first instar of select species, Florida Entomologist 99 (3), pp. 463-470 : 465

Key to Larvae II of Select Frankliniella Species of Florida Adapted from Nakahara & Vierbergen (1998).

No morphological differences were detected between the larvae II vouchers of F.bispinosa and the larva II collected with F.tritici adults.Therefore,larvae II that key to F.bispinosa from areas of Florida where populations of F.tritici are encountered should be reported as F.bispinosa / tritici .

1.— Pronotum with 6 pairs of setae ( Fig. 1A ); mesonotum with 5 pairs of setae ( Fig. 1A ..................................... (instar I)

1’.— Pronotum with 7 pairs of setae ( Fig. 2B ); mesonotum with 8 pairs of setae ( Fig. 2C................................... 2 (instar II)

2.— Dark band of abdominal tergite IX extends to and sometimes anterior to the campaniform sensilla ( Fig. 3G.............. F . fusca Hind

2’.— Dark band extends anterior to the D1 setae by about the distance of the diameter of the D1 setal socket ( Fig. 3A–E................ 3

3.— Posteromarginal teeth, abdominal tergite IX, between the D1 setae, longer than the basal width of the D1 setae ( Fig. 3A, B, D, E ..... 4

3’.— Posteromarginal teeth, abdominal tergite IX, between the D1 setae, equal to or less than the basal width of the D1 setae ( Fig. 3C, F, G ...................................................................................................................... 7

4.— Dorsal setae of abdominal tergites VIII broadly pointed or acute ( Fig 3B, C, E, G .............................................. 5

4’.— Dorsal setae of abdominal tergites VIII blunt ( Fig 3A, D, F ................................................................. 6

5.— Abdominal tergite VIII discal plaques with poorly developed or rounded microtrichia ( Fig. 3B ); D1 setae of tergite VIII usually less than 40 µm................................................................................ F. cephalica (D. L. Crawford)

5’.— Abdominal tergite VIII discal plaques with well-developed or pointed microtrichia ( Fig. 3E ); D1 setae of tergite VIII usually greater than 40 µm....................................................................................... F. occidentalis (Pergande)

6.— Abdominal tergite VIII discal plaques with broadly pointed to rounded microtrichia ( Fig. 3D ); D1 setae of tegite VIII 20–30 µm long..................................................................................................... F. kelliae Sakimura

6’.— Tergite VIII discal plaques with fine narrowly pointed microtrichia ( Fig. 3A ); D1 setae of tergite VIII 30–40 µm long................................................................................................................ F. bispinosa (Morgan)

7.— Abdominal posteromarginal teeth tergite IX minute, less than the basal width of the D1 setae ( Fig. 3F ); abdominal tergal setae blunt; antennal segment VII 20–25 µm long; anterior margin of dark band tergite IX ofen emarginate between the D1 setae............................................................................................................. F. schultzei (Trybom)

7’.— Abdominal posteromarginal teeth tergite IX small, most equal to the basal width of the D1 setae, occasionally some teeth laterad of the D1 setae are longer ( Fig. 3C ); abdominal tergal setae broadly pointed; antennal segment VII 27–33 µm long; anterior margin of dark band tergite IX variously shaped.......................................................................... F. insularis (Franklin)

Figures

Fig. 1. Larva I of F. kelliae: dorsal setae pairs, D1–D6 of pronotum and D1–D5 of mesonotum (A); arrow indicates small sclerotized teeth between D1 setae of abdominal tergite IX (B); scale = 25 µm.

Fig. 2. Larva II of F. bispinosa: dorsal setae pairs, D1–D4 of head (A); dorsal setae pairs, D1–D7 of pronotum (B); dorsal setae pairs, D1–D8 of mesonotum (C); scale = 25 µm.

Fig. 3. Abdominal tergites VIII and IX of larvae II: dorsal setae, D1, D2 of tergites VIII and IX F. bispinosa (A); F.cephalica (B); F.insularis (C); F. kelliae (D); F.occidentalis (E); F. schultzei (F); F. fusca (G); scale = 25 µm.