Abstract
The sericata-group of Orthomorpha is revised and shown to comprise six species, five of which have been collected only in Thailand, including O. enghoffi sp. n., O. alutaria sp. n., O. parasericata sp. n. and O. asticta sp. n. Both O. sericata Jeekel, 1964 and O. subsericata Golovatch, 1997 are redescribed and illustrated, in part based on type material. A key is provided to all of the species in the group, and their distributions are mapped.References
Enghoff, H. (2005) The millipedes of Thailand (Diplopoda). Steenstrupia, 29(1), 87–103.
Golovatch, S.I. (1997) On several new or poorly-known Oriental Paradoxosomatidae (Diplopoda, Polydesmida), VI. Arthropoda Selecta, 6(3–4), 35–46.
Jeekel, C.A.W. (1964) A new species of Orthomorpha Bollman from Thailand observed in migration, with taxonomic notes on the genus (Diplopoda). Tijdschrift voor Entomologie, 107, 355–364.