Magnicapitixyela Montagna M. & Magoga G., 2024

Montagna, Matteo, Magoga, Giulia, Stockar, Rudolf & Magnani, Fabio, 2024, The contribution of the Middle Triassic fossil assemblage of Monte San Giorgio to insect evolution., Communications biology 7 (1), No. 1023, pp. 1-10 : 4

Genus Magnicapitixyela Montagna M. & Magoga G. , gen. n.

Type species: Magnicapitixyela dilettae sp. n. by present designation.

Code Zoobank: LSID urn:lsid:zoobank.org:act:62299AF2-5601-4192- 8BD9-D7BC38D447A3.

Etymology: Magni- from the Latin magnus meaning big, capiti- from the Latin caput meaning head and -xyela from Xyelidae , the family to which Magnicapitixyela is ascribed. Meaning: Xyela with a big head.

Diagnosis: Small sawfly, forewing with narrow costal space, C thickened towards apex, reaching R (but not touching), sclerotized pterostigma, thick subcosta (SC), joining only C, R thicker than SC and sinuous; RS1 + 2 present; RS + M is ~ 1.3 times as long as 1-RS. M+cubital anterior (CuA) slightly concave until the split between M and CuA.2m-cu straight while 3rm sinuous.Anterior margin of cell 1r almost equal to 2r in length; cell 1-mcu ~ 3 times as long as high, distally dilatated.

Comparison: The new genus differs from other Triassic genera in the fully sclerotized pterostigma (not as in Archexyela Riek, 1955 ; Lithoxyela Rasnitsyn, 1969 ; Sirecomima Rasnitsyn, 1969 ); forewing slender, more than twice as long as wide (broad in Euryxyela Rasnitsyn, 1964 , broad and triangular in Ferganoxyela Rasnitsyn, 1969 ); costal area not narrow as in Lithoxyela Rasnitsyn, 1969 , Madygenius Rasnitsyn, 1969 , Xiphoxyela Rasnitsyn, 1969 and Xyelinus Rasnitsyn, 1964 ; cell 1r longer than 2r (almost of the same length in Leioxyela Rasnitsyn, 1969 ), presence of cells 3r and 4r (absent in Madygella Rasnitsyn, 1969 ), cell 3r wide (reduced in Triassoxyela Rasnitsyn, 1964 ). Magnicapitixyela gen. n. is close to Madygella Rasnitsyn, 1969 due to the well-sclerotized pterostigma,well developed and distinct SC, basal section of RS shorter than RS + M.