Revision of F. R. C. Reed’s Ordovician trilobite types from Myanmar (Burma) and western Yunnan Province, China Author Fortey, Richard A. Department of Earth Sciences, Museum of Natural History, Cromwell Road, London, SW 7 5 BD, UK. Author Wernette, Shelly J. Department of Earth and Planetary Sciences, University of California, Riverside, CA 92521, USA. & Department of Geography and Environmental Studies, Texas State University, San Marcos, TX 78666, USA Author Hughes, Nigel C. text Zootaxa 2022 2022-07-08 5162 4 301 356 journal article 93239 10.11646/zootaxa.5162.4.1 7d343017-483e-43be-9439-d06e748fc54e 1175-5326 6810290 DD2279FA-E8F1-4951-A5CA-91082E875580 Hadromeros ? submitis ( Reed, 1915 ) Fig. 13.1 1915 Cheirurus submitis Reed , p. 49, pl. 8, figs 13,14. Material . Lectotype (selected herein): cranidium from Upper Naungkangyi Beds (Katian), Lilu , northern Shan State , Myanmar , Fig. 13.1 ( Reed, 1915 , pl. 8, figs 13,14), GSI 11560. Discussion. We illustrate here a cast taken from the lectotype , original of Reed (1915 , pl 8. fig. 14). Only the cephalon is known of this species, which is only generally cheirurine, and invites comparison with those of many other species of similar age. It does, however, have very large, prominent but scattered tubercles on the cheeks and frontal lobe of the glabella. Many somewhat similar later Ordovician Chinese cheirurines have been assigned to the genus Parisoceraurus by Zhou & Zhen (2008) but these do not have such prominent tubercles. One species from the Pagoda Formation of Sichuan attributed (under open nomenclature) to Hadromeros by Zhou et al. (2016 , pl. 14, fig. 14) does invite comparison with H .? submitis in showing very coarse, scattered tubercles over the fixed cheeks and forward part of the glabella, and may support a tentative assignment to Hadromeros . However, the Sichuan specimen and the type species of Hadromeros both show relatively long (tr.) glabellar furrows compared with H.? submitis , while the frontal glabellar lobe of the latter is relatively short (sag.) and wide. This structure seems to be unusual in cheirurids, and the distinctive glabellar lobation of the Myanmar species may indicate that it could belong to an undescribed genus, but without a pygidium this cannot be verified.