Acemenychus Weise 1905f: 318

Synonomys

Monochirus Heyden 1878: 343 (not Chapuis).

Decispella Uhmann 1936d: 409 Nomen nudum.

Decispella Uhmann 1940e: 143.

Type Species

Hispa inermis Zoubkoff.

Diagnosis

Acmenychus can be distinguished by the following combination of characters:

• lateral margin of elytra and pronotumpronotum:
  occupies all of dorsal part of the prothorax; in anterior angles or posterior angles there may be a small tubercle or pore with a seta
  with long, stiff spines
• antennomere 1 with long spine
• pronotum pronotum:
  occupies all of dorsal part of the prothorax; in anterior angles or posterior angles there may be a small tubercle or pore with a seta
  with anterior margin with branched spine on each side
• tarsal claws totally fused, spatulate

Description

Body elongate; subparallel; subconvex; color black; total length 5.0 to 6.0 mm.

Head: small; convex; vertexvertex:
occupies the area behind and between the eyes
sparsely punctate, with medial sulcus; eyeeye:
elongate, slightly prominent, multifaceted; usually slightly kidney-shaped
large, flattened.

Antenna: filiform; robust; reaches to humerus; antennomere 1 incrassate, with long spine; 2 transverse, short; 3 2x length of 2; 4 to 5 transverse, subequal in length; 6 to 10 longer, subequal in length; 11 subequal in length to 10, pointed at apex; 1 to 6 striate, with few setae; 7 to 11 pubescent, forming loose club.

Pronotum: transverse; lateral margin rounded, with 3 spines (a branched spine on a common base plus a single spine [2+1] or 3 single spines [1+1+1]); anterior angle rounded; anterior margin curved, with branched spine on common base on each side; posterior angle acute; posterior margin bisinuate.

Scutellum: cordate.

Elytron: lateral margin straight, with short spines; exterior apical angle rounded with short spines; apical margin rounded, with few short spines; humerus angulate, not produced; with 8 rows of punctures plus scutellar row; interspace 2 costate.

Leg: tarsal claws totally fused, spatulate.

Distribution

Angola, Armenia, Azerbaijan, China, French Guinea, Iran, Israel, Ivory Coast, Jordan, Kazakhstan, Kurdistan, Mongolia, Nepal, Northern Rhodesia, Russia, Rwanda, Saudi Arabia, Tadzhikistan, Turkey, Turkmenistan, Turkomania.

World Fauna

Described species: 5 (Staines 2012). Key: Maulik 1919, Reitter 1927, Uhmann 1949a, Gressitt 1950, Gressitt & Kimoto 1963a.

Hosts

Phragmites (Poaceae).

References

Gressitt, J. L. 1950. The hispine beetles of China (Coleoptera: Chrysomelidae). Lingnan Science Journal 23(1-2):53-142.

Gressitt, J. L. & S. Kimoto. 1963a. The Chrysomelidae (Coleopt.) of China and Korea. Part 2. Pacific Insects Monograph 1B:301‑1026.

Heyden, L. 1878. In: O. Schneider & H. Leder (ed.). Beiträge zur Kenntniss der kaukasischen Käferfauna. Verhandlungen des naturforschenden Vereines in Brünn 17:1-103.

Maulik, S. 1919. Hispinae and Cassidinae of India, Burma and Ceylon. The fauna of British India. Taylor & Francis, London. 439 pp.

Reitter, E. 1927. Uebersicht der mir bekannten palaearkt. Hispini. Entomologisches Nachrichtsblatt 1(3):33-34.

Staines, C. L. 2012. Tribe Hispini. Catalog of the hispines of the world (Coleoptera: Chrysomelidae: Cassidinae). http://entomology.si.edu/Collections_Coleoptera.html

Uhmann, E. 1936d. Die Hispinen des "Musée du Congo Belge" 4. Teil. 60. Beitrag zur Kenntnis der Hispinen (Col. Chrys.). Revue de Zoologie et de Botanique Africaines 28:407-415.

Uhmann, E. 1940e. Die Genotypen der von mir aufgestellten Hispinen-Gattung. 88. Beitrag zur Kenntnis der Hispinen (Col. Chrys.). Entomologisk Tidskrift 61:143-144.

Uhmann, E. 1949a. Palaearktische Hispinae. 105. Beitrag zur Kenntnis der Hispinae (Coleopt. Chrysom.). Koleopterologische Zeitschrift 1:3-12.

Weise, J. 1905f. Bemerkungen über Hispinen. Deutsche Entomologische Zeitschrift 1905:317‑320.