Until recently, paleontologists believed tentaculitids became extinct by the end of the Frasnian. Lyaschenko (1958) described the youngest occurrence of the genera Styliolina and Homoctenus from the Frasnian of Russia. However, in Europe and North Africa, Lardeux (1969) proposed that Homoctenus ultimus pergracilis persisted into the Famennian. Sauerland (1983) reported the occurrence in France of the genera Styliolina and Striatostyliolina in the cicatricosa ostracod Zone (Frasnian), and Homoctenus in the splendens ostracod Zone (Frasnian-Famennian, upper gigas —middle triangularis conodont Zones). The first report of Famennian tentaculitids in China was from the Dachang area in Guangxi Province, China by Li and Hamada (1986). The discovery of Famennian tentaculitids associated with diagnostic conodonts extends the known range from the triangularis Zone to the marginifera Zone making these the youngest tentaculitids reported to date. This study indicates that in China the tentaculitids Striatostyliolina became extinct in the crepida Zone, Homoctenus in the rhomboidea Zone, and Styliolina in the marginifera Zone. Between 1987 and 1991 the author measured four stratigraphic sections in Guangxi Province—the Luofu, Maanshan, and Lihuashan sections in the Dachang area (Fig. 1), and the Lipu section in Lipu County. Figure 1 —Geological map of Luofu, Guangxi, China. D, Devonian: D23, Daihua Formation; C, Carboniferous; P, Permian; T, Triassic. Measured and sampled sections designated by closed triangles: 1, Maanshan; 2, Luofu; 3, Lihuashan. The Upper Devonian Daihua Formation, exposed at Luofo (2.6 km east of Luofu, Nandan County, Guangxi Province, China), consists of 30.7 m of limestone that can be divided into 83 beds (see Appendix for description and faunal list). Beds 1 through 78 contain three tentaculitid genera, Homoctenus Lyaschenko, 1955, Corona Wang, 1988, and Paradenticulites Xian and Wang, 1986, representing eleven species and one subspecies. The tentaculitids are thin-shelled and occur irregularly arranged …