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 Placoparina ? dravidicus ( Reed, 1915 ) Fig. 13.2 1915 Cheirurus dravidicus ; Reed, p. 48, pl. 8, fig. 12. Material. Holotype : pygidium from Lower Naungkangyi Beds (probable Darriwilian) at Man-shio , Fig. 13.2 ( Reed, 1915 , pl. 8, fig. 12), GSI 11559. Discussion. The species was described by Reed (1915) on the basis of one pygidium; a cast from the counterpart of the type specimen is illustrated here. Reed’s illustrations show the tips of the three pairs of pygidial spines. The anterior pair is not noticeably more strongly developed than the other two pairs, as it is in cheirurines, and the posterior pair is also prominent in P.? dravidicus . Lane (1971) showed that pygidia were the most informative sclerite in cheirurids, and it seems improbable that P. ? dravidicus is a cheirurine given its pygidial structure. Eccoptochile has a pygidium with three pairs of obtuse spines ( type material of the type species in Horný & Bastl, 1970 , pl. 14, fig. 1). The pygidium of Placoparina Whittard, 1940 , is generally similar. However, the relatively obtuse lobes, and their marked fulcrum are more like those on Placoparina ( Whittard, 1958 ) than Eccoptochile , and dravidicus is tentatively assigned herein to Placoparina . The identity of Reed’s species cannot confidently be resolved without further collections.