Sinoerasipteron xiaheyanensis Nel & Huang, 2024

Sinoerasipteron xiaheyanensis Nel & Huang gen. et sp. nov.

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Figs 2–3 View Fig View Fig

Diagnosis

As for the genus, by monotypy.

Etymology

Named after the Xiaheyan locality ( Ningxia, China).

Material examined

Only one specimen collected from the black shale of the Tupo Formation at Xiaheyan locality, without counterpart.

Holotype CHINA • imprint of a forewing, with extreme base missing and apex folded; Xiaheyan, Muscovian Tupo Formation; stored at Nanjing Institute of Geology and Palaeontology; NIGP202927 View Materials ; CAS.

Description

Imprint of moderately well preserved forewing (for justification see below), nearly complete, with extreme base missing; wing elongate not triangular-shaped; preserved length 68.1 mm, maximum width 10.8 mm; anterior wing margin and ScP straight; ScP reaching anterior wing margin opposite fork between RP1/2 and RP3/4 (i.e., at 30% of wing length); RA distally fused with C into strong costal vein; area between RA and RP1 with strong oblique crossvein at point of fusion of RA with C, basad origin of IR1; arculus at ca 8.0 mm from wing base; RP+MA 2.5 mm long; stem of of RP 10.0 mm long basad fork between RP1/2 and RP3/4; three longitudinal veins in area between IR1 and RP2; RP1/RP2 fork 27.5 mm distal of fork between RP1/2 and RP3/4; IR2 with two-three posterior branches; RP3/4 simple; MA with seven posterior branches; MP simple, undulated; CuA regularly posteriorly pectinate, with seven posterior branches; CuP- and CuA-crossings difficult to identify; CuP with long stem, seven-eight branches, and three-four rows of cells between it and posterior margin of wing; two rows of cells between AA and posterior margin of wing with four-five poorly defined posterior branches.

Age and outcrop

Tupo Formation at Xiaheyan locality, Zhongwei County, Ningxia Hui Autonomous Region, NW China; Moscovian, Pennsylvanian.