Abstract
Five species groups are established for 18 species of the genus Omalium Gravenhorst, 1802 from the Himalayan region: Acutangulum group containing O. acutangulum sp. n. (central Nepal) and O. amicorum sp. n. (Nepal); Amplissimum group containing O. amplissimum sp. n. (eastern Nepal) and O. bilobum sp. n. (eastern Nepal); Caesum group containing Palaearctic O. littorale Kraatz, 1857 and O. humerale Cameron, 1924 (India: Uttarakhand); Oxyacanthae group containing O. alticola Cameron, 1941 (India: Kashmir, Uttarakhand; western Nepal), O. altivagans Bernhauer, 1915 (India: Kashmir), O. beesoni Cameron, 1924 (India: Uttarkhand; western Nepal) O. marginatum Cameron, 1941 (India: Kashmir, Punjab; eastern Nepal), O. scapulare Coiffait, 1982 (India: West Bengal; western Nepal); Rivulare group containing O. angustissimum sp. n. (central Nepal), O. cariosum Cameron, 1924 (India: Uttarakhand), O. flavotestaceum sp. n. (India: West Bengal; eastern Nepal), O. kumari sp. n. (western Nepal), O. latocavum sp. n. (central Nepal), O. nigrum Coiffait, 1982 (Nepal) and O. secretum Cameron, 1924 (India: Uttarakhand; Nepal). Each species group is briefly discussed and keyed. Species in each group are (re-) described, illustrated, and their geographical distributions are mapped. Three synonyms are established: O. alticola = O. monticola Cameron, 1941 syn. n., O. beesoni = O. parallelicollis Coiffait, 1982 syn. n., O. littorale = O. gartneri Coiffait, 1982 syn. n. Lectotypes are designated for O. (s. str.) beesoni, O. (s. str.) cariosum, O. (s. str.) humerale and O. (s. str.) secretum. Additional material on O. littorale from Middle Asia is provided. Several species of the genus are recorded for the first time from certain areas: O. alticola for Uttarakhand (India) and Nepal, O. littorale for Pakistan, O. marginatum for Punjab (India) and Nepal, O. scapulare for India (Uttarakhand, West Bengal), and O. secretum for Uttarakhand (India).
Subject
Animal Science and Zoology,Ecology, Evolution, Behavior and Systematics
Reference28 articles.
1. Bernhauer, M. (1915) Zur Staphylinidenfauna des indo-malayischen Gebietes, insbesonders des Himalaya. (10. Beitrag). Coleopterologische Rundschau, 4, 49–60.
2. Cameron, M. (1924) New species of Staphylinidae from India. The Transactions of the Entomological Society of London, 1924, 160–198. https://doi.org/10.1111/j.1365-2311.1924.tb03357.x
3. Cameron, M. (1930) Staphylinidae. Vol. 1. In: Stephenson, J. (Ed.), The fauna of British India including Ceylon and Burma. Coleoptera. Taylor and Francis, London, pp. i–xvii + 1–471.
4. Cameron, M. (1941) Descriptions of new Staphylinidae (Coleopt.). 3. The Proceedings of the Royal Entomological Society of London (B), 10, 56–60, 142–147. https://doi.org/10.1111/j.1365-3113.1941.tb00709.x
5. Coiffait, H. (1977) Staphylinides récoltés au Népal par le Professeur Franz (2e partie). Bulletin de la Societe d’Histoire Naturelle de Toulouse, 112 (1976), 243–275.