Zygadenia Handlirsch, 1906

Strelnikova, O. D. & Yan, E. V., 2023, ON SPLITTING OF THE GENUS NOTOCUPES (COLEOPTERA: ARCHOSTEMATA): NEW DATA ON MORPHOLOGY AND TAXONOMY, Far Eastern Entomologist 488, pp. 1-28 : 21-22

Genus Zygadenia Handlirsch, 1906

Zygadenia Handlirsch, 1906: 558 (type species: Curculionites tuberculatus Giebel, 1856 ); Jarzembowski, 1993: 179; Ponomarenko, 2000: 317.

Kakoselia Handlirsch, 1906: 561 (type species: Camptodontus angliae Brodie, 1845 ); Ponomarenko, 2006: 95.

Type species: Zygadenia tuberculata (Giebel, 1856) .

DIAGNOSIS. Elytron from 4 to 14 mm long, bear four veins, a scutellar striole and an outer sulcus along epipleural margin; there are double rows of cells between veins. Veins 2 and 3 often have a common base, could merge before reaching elytral apex; veins 4 and 5 always merging before reaching elytral apex ( Figs. 2–4 ). Humerus (humeral bulge) not protruding anterolaterally, rounded. Epipleural margin gradually curving; elytral apex blunt. Epipleuron usually wide (only in Z. simpsoni and Z. angliaе narrow), often narrowing at elytral base (only in Z. sinitsae and Z. semen almost not narrowing).

REMARKS. The genus Zygadenia composed purely of the species described on the basis of isolated elytron (importance of having such taxon is discussed in Strelnikova & Yan, 2023).

COMPOSITION. There are 12 species from Lower Jurassic of Australia, Upper Jurassic of Germany and Mongolia, Lower Cretaceous of China, England and Russia, namely Z. tuberculata (Giebel, 1856) [ Innominatus tuberculatus Brodie, 1845 ; Curculionites tuberculatus Giebel, 1856 ], Z. alexrasnitsyni Strelnikova et Yan, 2021 , Z. angliae (Giebel, 1856) [ Camptodonthus angliae Brodie, 1845 ; Kakoselia angliae Handlirsch, 1906 ], Z. floodpagei Jarzembowski et al., 2015 , Z. giebeli Ponomarenko, 2014 , Z. handlirshi Ponomarenko, 2014 , Z. liui Jarzembowski et al., 2015 , Z. semen Ponomarenko, 2000 [ Notocupes ], Z. sibirica Ponomarenko, 2000 [ Notocupes ], Z. simpsoni Jarzembowski et al., 2015 , Z. sinitzae Ponomarenko, 2000 , Z. westraliensis Riek, 1968 [ Mesothoris ].

Indeterminate species of Zygadenia were reported from the Middle Triassic of Switzerland, the Lower Jurassic of Australia, the Lower Cretaceous of England and the Upper Cretaceous of Argentina.

Figures

Figs 1–4. Types of elytral venation. 1 – Conexicoxa brachicephala (Ponomarenko, 1994); 2 – schematic drawing of Zygadenia spp.; 3 – Z. liui Jarzembowski et al., 2015; 4 – Z. westraliensis (Riek, 1968). (Figs 1, 2, 4 – redrawing with changes from Ponomarenko, 1994, 2006; Martin, 2010). Scale bar = 1.