Sinomesuropetala daohugensis Boudet, Nel & Huang, 2023

Qi, Pengliang, Nel, André, Xiao, Chuantao & Zheng, Daran, 2023, Revision of Sinomesuropetala daohugensis Boudet, Nel & Huang, 2023 (Odonata Aeshnoptera: Mesuropetalidae), Zootaxa 5375 (1), pp. 103-110 : 105-106

Sinomesuropetala daohugensis Boudet, Nel & Huang, 2023

( Figures 1–4 )

New material. NIGP203295 , part and counterpart of a well-preserved male dragonfly, with nearly complete body, left forewing and hindwing, and very basally-preserved right forewing and hindwing .

Emended diagnosis. Forewing discoidal and subdiscoidal triangles three-celled and strongly transverse; hindwing discoidal and subdiscoidal triangles free; unicellular anal triangle; three rows of cells in postdiscoidal area before midfork; IR1 originated below pterostigma, zigzagged and poorly defined; IR2 originating from RP3/4; pterostigma very long and covering more than eight cells; cerci elongated.

Description. Body length from head to tip of abdomen 76.4 mm; head 5.2 mm long and 5.7 mm wide; thorax 12.8 mm long and maximum 5.6 mm wide; abdomen elongated, 54.7 mm long and maximum 4.4 mm wide.

Forewing 54.0 mm long and maximum width 9.4 mm; distance from base to arculus 4.1 mm, from base to nodus 29.6 mm, and from nodus to pterostigma 12.1 mm; pterostigma 6.0 mm long and 0.8 mm wide, covering at least eight cells; primary antenodal crossveins stronger than secondary antenodal crossveins; Ax0 near wing base, Ax1 3.5 mm distal of Ax0 and 0.6 mm basal of arculus, Ax2 8.4 mm distal of Ax1, opposite distal angle of discoidal triangle; five secondary antenodal crossveins present between Ax1 and Ax2; at least 10 antenodal crossveins visible between costal margin and ScP distal of Ax2, not aligned with nine antenodal crossveins between ScP and RA; eight postnodal crossveins present, not aligned with nine postsubnodal crossveins in second row; RP1 and RP2 closely parallel up to pterostigma with one row of cells in-between and two rows below level of mid-pterostigma; RP2 and IR2 closely parallel, with mostly one row of cells in-between, but two rows near wing margin; primary oblique vein ‘O’ absent and secondary oblique vein well present; no well-defined Rspl and Mspl; RP3/4 and MA basally parallel, sigmoidal, with a single row of cells in-between below second ‘O’, area between them expanded distally; postdiscoidal area with three rows of cells before midfork, expanded distally; MP and CuAa parallel, with a single row of cells in-between; median space free; CuP-crossing 1.1 mm basad arculus and 3.9 mm distad wing base; discoidal triangle elongated and wide, divided into three smaller cells, with length of anterior side 3.6 mm and of basal side 3.4 mm; subdiscoidal triangle divided into three cells; hypertriangle free; CuAa with four well-defined posterior branches; anal area with two rows of cells.

Hindwing, 51.6 mm long and maximum width 9.6 mm; distance from base to arculus 3.5 mm; Ax0 near wing base; Ax1 2.4 mm distal of Ax0 and 0.8 mm basal of arculus; Ax2 4.8 mm distal of Ax1; pterostigma elongated and well braced, 7.5 mm long and 0.7 mm wide, covering at least nine cells; anal triangle one-celled.

Figures

FIG.1 Sinomesuropetala daohugensis Boudet, Nel & Huang, 2023, NIGP203295, photographs of habitus, part (A) and counterpart (B). Scale bars = 10 mm.

FIG.2 Sinomesuropetala daohugensis Boudet, Nel & Huang, 2023, NIGP203295, photographs of forewing (A) and hindwing (B). Scale bars = 10 mm.

FIG.3 Sinomesuropetala daohugensis Boudet, Nel & Huang, 2023, NIGP203295, line drawings of forewing (A) and hindwing (B). Scale bars = 10 mm.

FIG.4 Sinomesuropetala daohugensis Boudet, Nel & Huang, 2023, NIGP203295, photograph showing details of head (A), thorax (B), anal terminal (C), discoidal area of left forewing (D), nodal area of left forewing (E), and pterostigmal area of left hindwing (F). Scale bars = 2 mm.