Three new species of the extant genus Eucinetus from mid-Cretaceous amber of northern Myanmar (Coleoptera: Eucinetidae) Author Li, Yan-Da 0000-0002-9439-202X State Key Laboratory of Palaeobiology and Stratigraphy, Nanjing Institute of Geology and Palaeontology, Chinese Academy of Sciences, Nanjing 210008, China & Bristol Palaeobiology Group, School of Earth Sciences, University of Bristol, Bristol BS 8 1 TQ, UK ydli@pku.edu.cn Author Engel, Michael S. 0000-0003-3067-077X Division of Invertebrate Zoology, American Museum of Natural History, New York, NY 10024 - 5192, USA & Facultad de Ciencias Biológicas, Universidad Nacional Mayor de San Marcos, Lima 15081, Perú & Departamento de Entomología, Museo de Historia Natural, Universidad Nacional Mayor de San Marcos, Lima 15072, Perú mengel@amnh.org Author Huang, Di-Ying 0000-0002-5637-4867 State Key Laboratory of Palaeobiology and Stratigraphy, Nanjing Institute of Geology and Palaeontology, Chinese Academy of Sciences, Nanjing 210008, China dyhuang@nigpas.ac.cn Author Cai, Chen-Yang 0000-0002-9283-8323 State Key Laboratory of Palaeobiology and Stratigraphy, Nanjing Institute of Geology and Palaeontology, Chinese Academy of Sciences, Nanjing 210008, China cycai@nigpas.ac.cn text Zootaxa 2024 2024-08-05 5492 2 214 230 http://zoobank.org/880aec67-7542-4e96-98cd-86a2c2a31da3 journal article 10.11646/zootaxa.5492.2.4 1175-5326 13219234 880AEC67-7542-4E96-98CD-86A2C2A31DA3 Eucinetus zhenhuai Li & Cai sp. nov. ( Figs 9–12 ) Material. Holotype , NIGP203941 , female. Etymology. The species is named after the coleopterist Dr. Zhenhua Liu. Locality and horizon. Amber mine located near Noije Bum Village, Tanai Township, Myitkyina District, Kachin State , Myanmar ; unnamed horizon, mid-Cretaceous, Upper Albian to Lower Cenomanian. Diagnosis. Labrum weakly biemarginate ( Fig. 11A ). Apical maxillary palpomere asymmetrical ( Fig. 11A ). Basal antennomeres relatively elongate (especially antennomeres 3–5); antennomere 3 about 0.85 times as long as 4 ( Fig. 11A ); antennomere 11 about 2.1 times as long as wide ( Fig. 11B ). Scutellar shield acute at apex ( Fig. 11 GA). Elytra about 2.1 times as long as combined width. Hind wings present. Metanepisternum at least twice as long as wide. Meso- and metatibiae with relatively dense spines along outer edge ( Fig. 11D,E ). Mesotibial spurs large; both distinctly stouter than spines along apical fringe of mesotibia ( Fig. 11D ). Metatibial spurs unequal ( Fig. 11D ). Description. Body fusiform and slender, about 2.5 mm long, 1.0 mm wide; surface with fine short setae. Head deflexed against ventral side of prothorax; entirely concealed from above by pronotum. Compound eyes weakly emarginate anteriorly, with interfacetal setae. Antennae 11-segmented, filiform; basal antennomeres distinctly elongate (especially antennomeres 2–5); distal antennomeres somewhat shortened; antennomere 3 about 0.85 times as long as 4; antennomere 11 about 2.1 times as long as wide. Frontoclypeal suture straight anteriorly and with distinct anterolateral angles. Labrum transverse, apically very weakly biemarginate. Mouthparts non-suctorial. Apical maxillary palpomere asymmetrical. FIGURE 9. General habitus of Eucinetus zhenhuai Li & Cai sp. nov. , holotype, NIGP203941, under incident light. A , Dorsal view. B , Ventral view. Scale bars: 500 μm. Prothorax widest at base. Lateral pronotal carinae complete, simple. Pronotal disc simple. Procoxae obliquely oriented, well-projecting, narrowly separated. Scutellar shield triangular, acute at apex. Elytra about 2.1 times as long as combined width; transversely strigulate; sutural stria present; epipleuron narrow, incomplete. Hind wings present. Metaventral posterior process without externally discernable discrimen. Metanepisternum at least twice as long as wide. Metacoxae contiguous; metacoxal plates well-developed and greatly enlarged. Mid and hind legs with fringe of spines at apices of tibiae and tarsomeres; fore legs without apical fringes of spines. Meso- and metatibiae with relatively dense spines along outer edge. Mesotibial spurs large; both distinctly stouter than spines along apical fringe of mesotibia. Metatibial spurs unequal. Tarsi 5-5-5, simple. Meso- and metapretarsal claws with accessory lobes ( Fig. 11F ). Abdomen with five ventrites. Ovipositor simple, with gonocoxites and gonostyli ( Fig. 11H,I ).