Science and Technology News

Four new cicada species discovered in Vietnam

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Scientists from Australia, the US and Vietnam have described four new cicadas belonging to the Semia genus, the Cicadidae family, the Auchenorrhyncha sub-family, the Hemiptera set (Semia genus has 13 species, including 6 species reported only in Vietnam), named as follows: Semia magna Emery, Lee & Pham, 2017; Emery Semia spiritus, Lee & Pham, 2017; Semia pallida Emery, Lee & Pham, 2017; and Semia albusequi Emery, Lee & Pham, 2017.

Semia magna Emery, Lee & Pham, 2017

Body length (mm): male 43.4–46.8 (45.2); male 34.9–37.4 (36.0). Head and chest length of male 17.0–18.2 (17.4); female 15.6–16.4 (16.0). Belly length: male 26.4–28.6 (27.8); female 18.4–21.0 (19.9). Wing length: male 50.1–52.9 (51.0); female 50.6–52.8 (51.6). Head width: male 11.3–12.2 (11.7); female 10.7–12.0 (11.6). Pronotum width: male 12.8–14.6 (13.4); female 13.2–14.5 (13.8). Bella width: male 14.1–16.6 (15.4); female 13.2–15.0 (14.1).

Semia spiritus Emery spice, Lee & Pham, 2017

Body length (mm): male 35.2–39.1 (36.8); female 27.8–31.0 (29.9). Head and chest length: male 13.8–16.0 (14.7); female 13.4–14.9 (14.2). Belly length: male 19.6–23.8 (22.0); female 14.4–16.1 (15.2). Front wing length: male 39.6–44.8 (42.0); female 41.5–44.5 (42.9). Head width: male 8.3–9.3 (8.9); female 8.8–9.2 (9.0). Pronotum width: male 9.9–11.1 (10.5); female 9.0–9.4 (9.2). Head width: male 12.0–13.9 (12.8); female 11.8–11.8 (11.8).
Species of Semia pallida Emery, Lee & Pham, 2017


Body length (mm): male 33.0–36.6 (35.3); female 26.2–31.0 (28.3). Length of head and chest: male 12.4–13.8 (13.4); female 12.2–14.5 (13.4). Belly length: male 20.7–23.0 (21.9); female 14.0–16.51 (14.9). Front wing length: male 34.4–41.2 (38.9); female 38.2–44.5 (40.4). Head width: male 8.0–9.4 (8.6); female 8.3–9.2 (8.9). Pronotum width: male 9.3–10.9 (10.0); female of 9.0–10.4 (9.7). Head width: male 11.5–12.7 (12.0); female 10.1–11.8 (11.0).

Semia albusequi Emery, Lee & Pham, 2017

Body length (mm): male 28.0–31.0 (29.2); female 23.2–23.8 (23.5). Length of head and chest: male 11.7–12.9 (12.3); female 12.2–12.5 (12.4). Belly length: male 15.5–18.5 (16.8); female 10.9–11.3 (11.1). Front wing length: male 33.3–35.8 (34.5); female 34.0–34.6 (34.3). Head width: male 7.9–8.3 (8.1); female 8.1–8.3 (8.2). Pronotum width: male 8.2–9.0 (8.6); female 8.4–8.5 (8.5). Head width: male 9.0– 9.8 (9.3); female 8.8–8.8 (8.8).

All these new species are found in the high mountains of Vietnam. Standard samples (holotype) of these new species are kept at Vietnam Museum of Nature of the Vietnam Academy of Science and Technology.

A detailed description of the species is available in Zootaxa Journal 4216 (2): 153–166.

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Figure 1: Semia magna: A – B, Standard male: A, seen from the back. B, look from the abdomen. C – D, female: C,
seen from the back. D, look from the abdomen. Measure = 10 mm

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Figure 2: Radio organ of male: A, Semia magna; B, Semia spiritus; C, Semia pallida; D. Semia albusequi

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Figure 3: Male genital organs: A – B, Semia magna: A, seen from the abdomen. B, look from the side. C – D, Semia spiritus: C, seen from the abdomen. D, seen from the side. E-F, Pallida: E, seen from the abdomen. F, seen from the side. G – H, Semia albusequi: G, seen from the abdomen. H, seen from the side. aed: aedeagus; bpl: basal lobe of pygofer; db: dorsal beak; ds: distal shoulder; unc: uncus

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Figure 4: Semia spiritus: A – B, standard male sample: A, seen from the back. B, seen from the abdomen. C – D, female: C,
seen from the back. D, seen from the abdomen. Measure = 10 mm.

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Figure 5: Pallida: A – B, male standard: A, seen from the back. B, seen from the abdomen. C – D, female: C,
seen from the back. D, look from the abdomen. Measure = 10 mm.

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Figure 6: Semia albusequi: A – B, male standard sample: A, seen from the back. B, look from the abdomen. C – D, children: C,
seen from the back. D, seen from the abdomen. Measure = 10 mm.

Translated by Phuong Huyen
Link to Vietnamese version

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