Measurements

Taxon classification

Animalia

Hemiptera

Cicadidae

Hou

Zehai

Qinglong

Wei

Cong

Morphology and identification of the final instar nymphs of three cicadas (Hemiptera, Cicadidae) in Guanzhong Plain, China based on comparative morphometrics

Zookeys107201420144253350

10.3897/zookeys.425.7897

Cryptotympana

atrata

(Fabricius, 1775)

Figs 2–5

Tettigonia atrata

Fabricius, 1775: 681

Cicada atrata

(Fabricius): Goeze 1778: 149

Tettigonia pustulata

Fabricius, 1787: 266

Cicada nigra

Olivier, 1790: 750

Fidicina bubo

Walker, 1850: 82

Fidicina atrata

(Fabricius): Walker 1850: 89

Cryptotympana atrata

(Fabricius): Stål 1861: 613

Cryptotympana sinensis

Distant, 1887: 415

Cryptotympana dubia

Haupt, 1917: 229

Cryptotympana coreanus

Kato, 1925: 13

Cryptotympana santoshonis

Matsumura, 1927: 49

Cryptotympana wenchewensis

Ouchi, 1938: 82

Cryptotypmana pustulata castanea

Liu, 1940: 82

Cryptotympana pustulata fukienensis

Liu, 1940: 82

Measurements

(mm or degree). Male (n = 10): BL 26.8 (23.5–31.5), PCL 5.2 (4.7–5.5), PCW 5.2 (4.9–5.7), CL 3.1 (2.9–3.3), HW 11.7 (10.9–12.1), PL 8.3 (7.7–8.7), PW 14.3 (13.6–15.2), PML 16.5 (15.5–17.3), WL 12.6 (11.9–13.1), FL 6.2 (5.9–6.5), TL 6.6 (6.1–7.1), FA 71.4 (69.5–73.2).

Female (n = 10): BL: 26.3 (23.3–29.7), PCL 5.2 (4.9–5.4), PCW 5.2 (5.0–5.3), CL 3.0 (2.8–3.2), HW 11.4 (10.5–12.1), PL 8.1 (7.3–8.7), PW 14.2 (13.6–15.1), PML 16.2 (15.2–17.0), WL 12.5 (11.5–13.1), FL 6.2 (5.7–6.5), TL 6.5 (6.0–7.0), FA 71.6 (69.4–73.4).

Description.

Body (Fig. 2A, B) dark brown, curved in lateral view, with sparse setae mainly on venter.

Figure 2.

Final instar nymphs. A Cryptotympana atrata, lateral view of body B Cryptotympana atrata, dorsal view of body C Meimuna mongolica, lateral view of body D Meimuna mongolica, dorsal view of body E Platypleura kaempferi, lateral view of body F Platypleura kaempferi, dorsal view of body. Scale bars = 5.0 mm.

Head (Fig. 2B). Somewhat triangular in dorsal view; crown including white compound eyes about four times wider than long and about the same width as anterior margin of pronotum. Antenna brown, filiform. Postclypeus prominently swollen, covered with dense brown pile. Rostrum reaching to posterior coxae.

Thorax (Fig. 2A, B). Pronotum broad, paramedian and lateral fissures distinct, pronotal collar undeveloped, posterior margin distinctively concave medially in dorsal view. Mesonotum slightly wider than pronotum, with two small scutal depressions on disc. Metanotum very small. Fore wing bud developed, reaching to middle of 3^rd abdominal segment laterally; hind wing bud slightly developed.

Leg (Figs 5A, B, 6A, D). Generally dark brown. Fore femur with femoral formula 2-1-7: posterior tooth long and sharp, accessory tooth robust and sharp, intermediate tooth with projection in one of its sides; femoral comb usually with seven teeth, the first tooth about as large as the second tooth. Fore tibia arched, flattened laterally; apical tooth long; point of blade of tibia large and long, tooth-like, separated from apical tooth of blade by a strong incision. Apex of tibia with five spines in both mid and hind legs. Pretarsi of all legs well developed into a pair of claws of unequal sizes.

Abdomen (Fig. 4A–C). Size varying depends on the development of the nymph. In female, 8^th and 9^th sternites with two sharp posterior marginal protrusions. In male, 9^th sternite almost entirely concealed by 10^th sternite, four protrutions present on surface: a large triangular protrusion near lateral margins, respectively, and a pair of very small rounded protrusions on posterior margin; 10^th sternite smooth.

Figure 3.

Antennae of final instar nymphs. A Cryptotympana atrata B Meimuna mongolica C Platypleura kaempferi. Scale bars = 0.5 mm.

Figure 4.

Abdominal apex in ventral view of final instar nymphs. A Cryptotympana atrata, female B and C Cryptotympana atrata, male D Meimuna mongolica, female E and f Meimuna mongolica, male G Platypleura kaempferi, female H and I Platypleura Kaempferi, male. Scale bars = 1.0 mm.

Figure 5.

Left foreleg of final instar nymphs. A Cryptotympana atrata, inner view B Cryptotympana atrata, outer view C Meimuna mongolica, outer view D Platypleura kaempferi, outer view. acf, accessory tooth of femur; apt, apical tooth of tibia; bt, blade of tibia; f, femur; fc, femoral comb; itf, intermediate tooth of femur; pbt, point of blade of tibia; ptf, posterior tooth of femur; t, trochanter; ta, tarsus; ti, tibia. Scale bars = 1.0 mm

Figure 6.

Spines at the apex of mid and hind tibiae of final instar nymphs. A mid tibia of Cryptotympana atrata B mid tibia of Meimuna mongolica C mid tibia of Platypleura kaempferi D hind tibia of Cryptotympana atrata E hind tibia of Meimuna mongolica F hind tibia of Platypleura Kaempferi. Scale bars = 1.0 mm.

Variations of femoral comb.

Ten percent (2/20) of the individuals investigated with femoral comb with six teeth, instead of seven teeth.

Walker

(1850) List of the specimens of homopterous insects in the collection of the British Museum. Part 1.British Museum, London, 260 pp.

Stål

(1861) Genera nonnulla nova cicadinorum.Annales de la Société Entomologique de France (4) 1: 613–622.