Fig. 2
From: New insects feeding on dinosaur feathers in mid-Cretaceous amber
Holotype and paratypes of Mesophthirus engeli Gao, Shih, Rasnitsyn & Ren, gen. et sp. nov. within the AMBER No. 01 from mid-Cretaceous. a, b Holotype and line drawing of M. engeli sp. nov., CNU-MA2016009. c Enlargement of mouthpart of a shows details of mandible and maxillary palpi, arrows in white show teeth and arrows in green show the segments of palpi. d Paratype of M. engeli sp. nov., CNU-MA2016005, shows setae on the apex of antenna and single pretarsal claw. e, f Paratype and line drawing of M. engeli sp. nov., CNU-MA2016003, show spiracles on meso- and metanotum. g Paratype of M. engeli sp. nov., CNU-MA2016001, shows details of antennae, eyes, and spiracles on the side of abdominal segments, indicating the size scale of M. engeli sp. nov. with a feather barbule. h Paratype of M. engeli sp. nov., CNU-MA2016002, shows the two long stiff setae on the outsides of pretarsus. i Artist’s reconstruction of M. engeli sp. nov. of elder development stage feeding on the feather. It was reconstructed mainly based on the morphological characters of the holotype CNU-MA2016009, with supplemental consideration of CNU-MA2016001 and CNU-MA2016003. Colors of the insects are conjectural and referring to the general color of living feather-feeding lice. Scale bars, 50 μm.
