Chen et al.—New Jurassic Sinoalidae from China


997


Figure 3. Jiania gracila Wang and Szwedo in Wang et al., 2012: (1) specimen STMN48-1809; (2) specimen STMN48-1809 under alcohol, with line drawings of hind wings; (3) specimen STMN48-1808; (4) specimen STMN48-1808 with outline of hind wings. Scale bar for all images.


Occurrence.—The two specimens were collected from Daohugou Village (41°18′N, 119°13′E), at the same locality where the holotype was collected.


Description.—Specimen STMN48-1809 (Fig. 3.1, 3.2): body 15.2mm long including forewings in repose. Head with com- pound eyes length as preserved 1.5mm, obviously narrower than pronotum. Pronotum ~1.6mm long and 3.5mm wide, anterior margin straight, posterior margin poorly preserved. Mesonotum ~3.1mmlong in midline and ~4.0mmwide at base. Abdomen with ovipositor ~8.3mm long and ~4.7mm wide, with seven segments visible. Ovipositor slightly extending beyond forewing tips. Forewings slender, ~13.0mm long, 4.2mm wide, with


length/width ratio ~3.1. Costal margin slightly arched. Posterior margin almost straight. Apical margin rounded. Costal area punctate, long and narrow, with length/width ratio ~6.0. Clavus strongly arched, long, with length/width ratio ~5.2. Apices of costal area and clavus almost at the same level, at ~0.7 of wing length. Apical cells six. Pc +CP long and thicken, almost parallel to costal margin. ScP weak and short, running to and fusing with ScP +R+M+ CuA, separating from the latter and then ending at apex of costal area. ScP +R+M+CuA bifurcat- ing into ScP+R+M and CuA at junction with crossvein cua-cup, near basal one-fifth wing length; stem ScP +R+M extremely short. R bifurcating into RA and RP in basal 0.4 wing length; RA and RP unbranched, connected to each other by crossvein ir; RA slightly arched, RP sinuous and curved at junction with crossvein ir and r-m. Stem M nearly straight, branched into M1+2 and M3+4 slightly distad of middle of


wing (at about basal 0.55 wing length); M1+2 and M3+4 unbranched, connected to each other by crossvein im. Cell C3 ~1.5 times as long as adjoining apical cell. Stem CuA strongly curved at base, and then nearly straight, branching into CuA1 and CuA2 at basal 0.68 wing length. CuP strongly curved at junction with crossvein cua-cup, and then nearly straight. A1 and A2 poorly preserved. Hind wing slightly shorter than forewing, with distal


portion darkly stained, without peripheric membrane. Stem R bifurcating RA and RP at base of ending point of A2. Vein M unbranched, nearly straight, connected to RP by short crossvein r-m. Stem CuA straight, branching into CuA1 and CuA2 nearly at the same level of ending point of A1; CuA and CuA1 at 145° angle; CuA and CuA2 in alignment; CuA1 connected toM by short crossvein m-cua, at base of crossvein r-m. CuP strongly curved at the same level of ending point of A2. Specimen STMN48-1808 (Fig. 3.3, 3.4): body with


ovipositor as preserved 15.2mm long. Head destroyed. Legs poorly preserved, obscure. Abdomen with ovipositor ~9.8mm long and ~4.8mm wide, with seven segments visible. Ovipositor extending just beyond forewing tips. Forewings slender, ~13.3mm long, 4.1mm wide, with


length/width ratio ~3.2. Basal portion of forewings deformed, basal portion of left forewing partly missing. Costal margin slightly arched. Posterior margin almost straight. Apical margin rounded. Costal area long and narrow; costal area of right forewing punctate at basal part, but not visible for left one. Clavus strongly deformed. Apices of costal area and clavus almost at the same level. Apical cells six. Pc +CP long and thicken, almost parallel to costal margin. ScP weak and short,


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