Meimuna mongolica (Distant, 1881)

Hou, Zehai, Li, Qinglong & Wei, Cong, 2014, Morphology and identification of the final instar nymphs of three cicadas (Hemiptera, Cicadidae) in Guanzhong Plain, China based on comparative morphometrics, ZooKeys 425, pp. 33-50 : 37-38

Taxon classification Animalia Hemiptera Cicadidae

Meimuna mongolica (Distant, 1881) Figs 2-5

Cosmopsaltria mongolica Distant, 1881: 638

Meimuna mongolica (Distant): Distant 1906: 66

Meimuna suigensis Matsumura, 1927: 1

Meimuna chosensis Matsumura, 1927: 52

Meimuna heijonis Matsumura, 1927: 52

Meimuna santoshonis Matsumura, 1927: 52

Meimuna gallosi Matsumura, 1927: 52

Measurements

(mm or degree). Male (n = 10): BL 19.8 (18.0-21.3), PCL 3.5 (3.2-3.7), PCW 3.2 (2.9-3.5), CL 2.4 (2.2-2.7), HW 7.2 (6.8-7.7), PL 4.6 (4.4-4.8), PW 7.8 (7.3-8.2), PML 9.4 (8.7-9.8), WL 8.7 (8.0-9.4), FL 4.8 (4.5-5.0), TL 4.6 (4.3-4.8), FA 61.4 (60.5-62.8).

Female (n = 10): BL 19.1 (17.9-20.9), PCL 3.3 (3.1-3.6), PCW 3.0 (2.7-3.2), CL 2.2 (2.0-2.6), HW 6.9 (6.8-7.2), PL 4.4 (4.2-4.7), PW 7.5 (7.2-8.3), PML 8.9 (8.4-9.7), WL 8.4 (8.0-8.9), FL 4.7 (4.5-4.9), TL 4.5 (4.2-4.7), FA 61.4 (60.1-63.2).

Description.

Body (Fig. 2C, D) pale brown, narrow and elongated, with setae scattered mainly on venter.

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

Thorax (Fig. 2C, D). 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 4th abdominal segment laterally, hind wing bud slightly developed.

Leg (Figs 5C, 6B, E). Generally dark brown. Fore femur with femoral formula 2-1-7 or 2-1-8: posterior tooth long and sharp, accessory tooth small, with apex somewhat blunt, intermediary tooth robust; femoral comb usually with seven or eight teeth, the first tooth about as large as the second tooth. Fore tibia arched, flattened laterally; apical tooth long; point of blade of tibia very small, toothlet-like, separated from apical tooth of blade by a very weak incision. Tibia with five apical spines in both mid and hind legs. Pretarsi of all legs well developed into a pair of claws of unequal sizes.

Abdomen (Fig. 4 D–F). Size varying depending on the development of the nymph. In female, 8th and 9th sternites with two sharp posterior marginal protrusions. In male, 9th sternite totally concealed by 10th sternite, three protrusions present on surface: a smaller medial, coniform protrusion near anterior margin, and two larger rounded protrusions on posterior margin; 10th sternite with two distinct projections adjacent to anterior margin.

Variations of femoral comb.

Forty percent (8/20) and 60% (12/20) of the individuals observed with seven and eight teeth on the femoral comb, respectively.