taxonID	type	description	language	source
182FC8481FE8598391025F56C406F561.taxon	description	Figs 1, 2, 3	en	Ge, Si-Xun, Ren, Li-Li, Tan, Jiang-Li (2025): The mid-Cretaceous crown wasp genus † Tumidistephanus Ge & Tan: discovery of the first male and a new species (Hymenoptera, Stephanidae). ZooKeys 1248: 53-59, DOI: 10.3897/zookeys.1248.157257
182FC8481FE8598391025F56C406F561.taxon	etymology	Etymology. The species name is derived from Epimetheus, the younger brother of Prometheus in ancient Greek mythology.	en	Ge, Si-Xun, Ren, Li-Li, Tan, Jiang-Li (2025): The mid-Cretaceous crown wasp genus † Tumidistephanus Ge & Tan: discovery of the first male and a new species (Hymenoptera, Stephanidae). ZooKeys 1248: 53-59, DOI: 10.3897/zookeys.1248.157257
182FC8481FE8598391025F56C406F561.taxon	diagnosis	Diagnosis. Head subcircular, with seven distinct coronal teeth; forewing with 1 - M approximately 0.5 × as long as 1 - Rs and slightly curved; veins Rs + M and 1 Cu parallel; vein 2 Rs + M nearly absent, with veins 2 - Rs and the apical abscissa of M distinctly unconnected. Metafemur markedly robust, with two prominent and five medium-sized teeth.	en	Ge, Si-Xun, Ren, Li-Li, Tan, Jiang-Li (2025): The mid-Cretaceous crown wasp genus † Tumidistephanus Ge & Tan: discovery of the first male and a new species (Hymenoptera, Stephanidae). ZooKeys 1248: 53-59, DOI: 10.3897/zookeys.1248.157257
182FC8481FE8598391025F56C406F561.taxon	description	Description. Holotype. • ♂, length of body about 3.25 mm (excluding antennae). Forewing length about 1.78 mm. Head. Antenna filiform, elongate, composed of at least 19 flagellomeres; first flagellomere elongated and robust, second flagellomere comparatively short. Head broadly subcircular; frons coarsely obliquely to transversely rugose near anterior coronal tooth; vertex with seven distinct tubercles, transversely carinate posterior to the anterior coronal teeth, carinae not extending to the occipital carina. Occipital carina obsolete; temple moderately expanded posterior to compound eye. Mesosoma. Pronotum short and robust, lacking distinct pronotal fold; neck, medial and posterior region of pronotum aligned in profile. Pronotum and mesonotum densely foveate; mesopleuron laterally with oblique transverse rugosity and ventrally with large foveae. Wings. Forewing: vein 1 - M 0.5 × as long as 1 - Rs and slightly curved, 1.5 × as long as vein m-cu; vein 2 - Rs 3.4 × as long as vein r-rs; vein r-rs ends 0.3 × length of pterostigma; vein A incomplete, reaching only reach at 1 cu-a; vein Rs + M and 1 Cu parallel; vein 2 Rs + M almost absent, with no connection between veins 2 - Rs and the distal segment of M. Hindwing with vein Cu-a and vein M + Cu lacking. Legs. Fore and mid legs with their femora and tibiae flattened and expanded. Metacoxa robust, spindle-shaped, ventrally with two rows of tubercles; metafemur coriaceous, extremely swollen medially, nearly oval in profile. Metafemur with two large and five medium-sized teeth (two intercalated between the large teeth, three discal to the apical large teeth); metatibia 1.2 × as long as metafemur, with basal narrow portion 0.9 × as long as apical broadened part; metatarsus with five tarsomeres; basitarsus 4.3 × as long as wide. Metasoma. Metasoma with eight segments. First tergum and sternum not fused laterally, Tergite I rather robust, about 0.9 × as long as tergite II. Female. Unknown.	en	Ge, Si-Xun, Ren, Li-Li, Tan, Jiang-Li (2025): The mid-Cretaceous crown wasp genus † Tumidistephanus Ge & Tan: discovery of the first male and a new species (Hymenoptera, Stephanidae). ZooKeys 1248: 53-59, DOI: 10.3897/zookeys.1248.157257
D1AEC82231F25EDEB7AE1BEFF8C4EA38.taxon	type_taxon	Type species. † Tumidistephanus prometheus Ge & Tan, 2023.	en	Ge, Si-Xun, Ren, Li-Li, Tan, Jiang-Li (2025): The mid-Cretaceous crown wasp genus † Tumidistephanus Ge & Tan: discovery of the first male and a new species (Hymenoptera, Stephanidae). ZooKeys 1248: 53-59, DOI: 10.3897/zookeys.1248.157257
D1AEC82231F25EDEB7AE1BEFF8C4EA38.taxon	diagnosis	Diagnosis. Mesosoma robust. Metafemur distinctly swollen medially, appearing nearly oval in shape. Metafemur ventrally with two prominent and at least five medium-sized teeth. Female metatarsus five segmented. Forewing in females with veins Rs + M and 1 Cu non-parallel in females; junction between 2 - Rs, M, and 2 Rs + M distinctly disconnected, forming a conspicuous gap. First metasomal tergite (T 1) and sternite (S 1) not fused laterally. Ovipositor length nearly as long as metasoma.	en	Ge, Si-Xun, Ren, Li-Li, Tan, Jiang-Li (2025): The mid-Cretaceous crown wasp genus † Tumidistephanus Ge & Tan: discovery of the first male and a new species (Hymenoptera, Stephanidae). ZooKeys 1248: 53-59, DOI: 10.3897/zookeys.1248.157257
