Formosibittacus macularis, Li & Ren & Shih, 2008

Li, Yan-Li, Ren, Dong & Shih, Chung-Kun, 2008, Two Middle Jurassic hanging-flies (Insecta: Mecoptera: Bittacidae) from Northeast China, Zootaxa 1929 (1), pp. 38-46 : 39-42

publication ID	https://doi.org/ 10.11646/zootaxa.1929.1.2
DOI	https://doi.org/10.5281/zenodo.5231043
persistent identifier	https://treatment.plazi.org/id/038B356E-FF94-5C02-FF36-2B38FB23FCBC
treatment provided by	Felipe
scientific name	Formosibittacus macularis
status	sp. nov.

Treatment

Formosibittacus macularis sp. nov.

( Figs. 1A–G View FIGURE 1 , 3A–B View FIGURE 3 )

Etymology. The species is named macularis after the presence of many maculae on wings.

Material. Holotype CNU-M-NN2007001-1 and CNU-M-NN2007001-2, positive and negative (coll. Fang Liang). Deposited at the Key Lab of Insect Evolution & Environmental Changes, the College of Life Sciences, Capital Normal University ( CNU), Beijing, China.

Horizon and locality. Jiulongshan Formation, Middle Jurassic, Daohugou Village, Shantou Township, Ningcheng County, Inner Mongolia, China.

Diagnosis. Sc very long, terminating at about three-fifth of the length of wing; sc-r at about two times its length before end of Sc; dark zones along cross-veins and darkened apex in wing membrane.

Description. Head. Two antennae less than half as long as body. Rostrum is not preserved ( Figs. 1 View FIGURE 1 A-B, D).

Legs. In the new genus, fore legs, middle legs and hind legs are visible, but right fore leg is perfectly preserved: it long and lender with a single, predatory tarsal claw, its tarsi with five tarsomeres, and the fifth tarsomere closed against the fourth; third tarsomere with small ventral spines; surface of all legs densely covered with short setae ( Figs. 1 C View FIGURE 1 , 2G View FIGURE 2 ).

Wings. Wing narrow basally; Conspicuous thyridium at the first fork of M; M 1+2 dividing slightly beyond the fork of R 4+5; One cross-vein between R 2 and R 3; two cross-veins between R 2+3 and R 4+5; four cross-veins between R 4 and R 5; four cross-veins between R 5 and M 1; three cross-veins between M 1 and M 2; four crossveins between M 1+2 and M 3+4; one cross-vein between M 3 and M 4; CuA and CuP almost parallel, three crossveins between them before cu a -m 4; 1A joining to 2A by two cross-veins; vein 2A ending slightly beyond the origin of Rs; vein 3A absent ( Fig 1E View FIGURE 1 ). Hindwings seem to be identical to the forewings, except for the apparent fusion of 1A and CuP, and 2A terminating before the origin of Rs ( Fig. 1F View FIGURE 1 ).

Abdomen. At least 10 visible segments present ( Fig.1D View FIGURE 1 ). The segments are in lateral view except that terminal three abdominal segments are in ventral view. Subanusa lobo and Genital opening visible ( Fig. 3 View FIGURE 3 A-B).

Body 21mm long; forewing 23mm long, 5.0mm wide; hindwing 20mm long, 4.9mm wide.