Yoyetta abdominalis

Popple, Lindsay W. & Emery, David L., 2020, Four New Species of Cicadas in the Yoyetta abdominalis (Distant) Species Group (Hemiptera: Cicadidae: Cicadettinae) from Southeastern Australia, Records of the Australian Museum 72 (4), pp. 123-147 : 145-146

Key to species in the Yoyetta abdominalis species group

based on male specimens

The key is slightly modified and expanded from Emery et al. (2019). Specimens must be set with wings spread to begin using this key. For males, in some cases, the genitalia will need to be exposed (or dissected) to allow examination of the aedeagus.A vernier caliper is required to check measurements. Male specimens must often be examined microscopically and may require dissection in some instances.

1 Abdominal tergites 2–8 and sternites II–VII uniformly black or brown without orange- or yellow-brown markings; inter- segmental membranes dark and inconspicuous ......................................................................... 2

—— Abdominal tergites 2–8 mainly black with contrasting orange- or yellow-brown markings, or contrasting intersegmental membranes; sternites II–VII mainly yellow-brown or orange .................................................. 4

2 Fore wing basal membranes orange or pale orange-white ......................................... Y. timothyi

—— Fore wing basal membranes red ................................................................................................ 3

3 When viewed from ventral side, tip of aedeagus strongly bifurcate, with apical arms splayed laterally, sometimes in a weak “v” shape, at an angle of 150–180 degrees ....................................................... Y. denisoni

—— When viewed from ventral side, tip of aedeagus undivided or weakly divided, without distinct lateral arms ............................................................ Y. kershawi

4 Tergites 5–7 partly black with contrasting, orange or yellow markings .................................................................................................................................... 5

—— Tergites 5–7 entirely dark brown to black with yellow or orange coloration restricted to the intersegmental membranes ........................................................... 10

5 Opercula mainly pale grey to dark grey-brown ......................................................................... 6

—— Opercula mainly red or orange .................................................................................................. 9

6 Dorsal surface of head, pronotum and mesonotum typically covered with dense gold pubescence; fore wing basal membranes orange or pink ............................................................................................................................ 7

—— Head, pronotum and mesonotum not covered in conspicuous pubescence; fore wing basal membranes pale grey ................................................................... 8

7 Hind wing plagas narrow on ac2(v) (along vein 3); apex of theca blunt and club-like ............................................................................................... Y. abdominalis

—— Hind wing plagas broad on ac2 (along vein 3), though not quite as broad as on jugum; apex of theca tapered and angled 30° ventrally .................................................................................................................... Y. loftyensis

8 Lateral sides of tergites 3–7 mainly orange; tergite 8 with orange markings on anterodorsal side ........................................................................................ Y. aaede

—— Lateral sides of tergites 3–7 mainly black (with yellow dorsolateral markings); anterodorsal side of tergite 8 black ................................................. Y. serrata

9 Body length <23 mm; sternites III–VII bright reddish-orange without a continuous dark brown to black central marking ................................... Y. spectabilis

—— Body length> 23 mm; sternites II–VII yellowish-orange or reddish-brown with a continuous dark brown to black central marking ......................................................................................................................... Y. regalis

10 Fore wing length <26 mm ...................................................................................................... 11

—— Fore wing length> 26 mm ...................................................................................................... 12

11 Pronotum dark brown to black with contrasting yellow-brown central marking .......................................................................................................... Y. electrica

—— Pronotum dark brown to black without contrasting yellow-brown central marking ..................................................................................................... Y. hunterorum

12 Dorsal surface of head, pronotum and mesonotum with an inconspicuous, sparse covering of pubescence; lateral depressions adjacent to cruciform elevation conspicuous, brown to pale brown ............................................................................................................... Y. grandis

—— Dorsal surface of head, pronotum and mesonotum typically with dense, black pubescence; lateral depressions adjacent to cruciform elevation inconspicuous, typically dark brown to black ............................................. 13

13 Hind wing plagas broad; with opaque white area expressed equally in cells ac3 and ac2(v) (either side of the jugal fold) ................................. Y. subalpina

—— Hind wing plagas narrow or predominantly expressed in ac3, with a narrow extent on ac2(v) (along vein 3a) ....................................................................... 14

14 Tergite 8 black with a brown, reddish-brown or dark reddish- brown posterior lateral marking on each side; apex of theca distinctly club-shaped; transparent flange along margin of recurvature not quite as broad as thecal shaft ............................................................... Y. regalis

—— Tergite 8 entirely dark brown to black without posterior lateral markings; apex of theca not club-shaped but narrow with ornamentation; transparent flange along margin of recurvature much broader than thecal shaft ................................................................................................ 15

15 Hind wing plagas opaque bold and occupying the jugum ......................................... Y. douglasi

—— Hind wing plagas dull and narrow with jugum mainly hyaline .............................................. 16

16 Sternites III–VII yellow-brown to orange-brown without a dark brown to black central marking ................................................................................... Y. verrens

—— Sternites II–VII mainly yellow-brown to orange-brown with a broken, dark brown to black central marking ............................................................ Y. ngarabal ACKNOWLEDGEMENTS. Specimens were collected under NSW Department of Environment, Energy and Science collecting permits S11011 , SL 100650 (DE and LWP) and SL 100704 (LWP), and Queensland Department of Environment and Science permit WITK15549915 (LWP). Specimens of Y. douglasi sp nov., from the Grampians were collected by Fabian Douglas under research permit 10000667 from the Victorian Department of Sustainability and Environment. Ms Hannah Matthews was commissioned to prepare drawings of the genitalia. Federica Turco and Beth Mantle (ANIC), Susan Wright and Karin Koch (QM), Derek Smith (AM) and Peter Hudson (SAM) either provided access to, or received specimens. Ben Parslow (SAM) kindly obtained additional measurements and data from specimens stored in the SAM. Max Moulds gave access to specimens in his private collection. Dave Marshall and Kathy Hill generously provided access to their collection of calling song recordings and Nathan Emery assisted with several figures. Max Moulds and Shane McEvey provided constructive comments, which improved the manuscript.