Aduantoma insolita Sun, Rasnitsyn, Zhuang & Shih 2024, gen. et sp. nov.
Year: 2024
Type: other
Abstract: Aduantoma insolita Sun, Rasnitsyn, Zhuang & Shih gen. et sp. nov. (Fig. 8) http://zoobank.org/ urn:lsid:zoobank.org:act: 0041EF57- E06D-4083-A47D-26F6EC9D8DD3 Diagnosis: As for genus (see above). Etymology: The species name is derived from the Latin word ‘insolitus’* meaning unusual* rare* and referring to the posture of this sawfly preserved gracefully. Material: Holotype * CNU-HYM-NN2022310 p/c (part and counterpart). Locality and horizon: Latest Middle Jurassic (late Callovian)* Jiulongshan Formation; Daohugou Village* Wuhua Township* Ningcheng County* Chifeng City* Inner Mongolia * China. Description: Holotype * CNU-HYM-NN2022310 (Fig. 8A–C). Male. Body length (excluding antennae) 8.4 mm. Forewing nearly complete* head* thorax* and part of legs preserved. Head: Transverse* somewhat narrowed forwards* with eyes occupying most of head sides* flat. Antennae not preserved. Forewing: Length 6.5 mm as preserved. Pterostigma wide* sclerotized basally. Sc with stalk free (distant from R)* with kink to touch R at level of 1-M base* leaving Sc 1 as oblique crossvein intersecting with C behind level of 1-Rs (Fig. 8D). 1-Rs distinct* single. 1-M (0.48 mm) 3.4 times as long as 1-Rs (0.14 mm)* gently arching* shorter than 2-Cu. Cell 1r large; Rs+M more than twice as long as 2-M. M+Cu bent. Crossvein 2r-rs (0.5 mm) nearly equal to 1r-rs (0.4 mm)* oblique* and meeting with pterostigma only near its apex. 1m-cu longer than 2-Cu. Leg: Left hind leg well preserved. Protibia 2.0 mm long* with no spurs visible; tarsomere I longer than tarsomeres II* III* and IV combined; tarsomere lengths (in millimetres): 0.76* 0.32* 0.26* and 0.16* respectively; last segment not fully preserved. Abdomen: Male genitalia (Fig. 8E) with gonocoxa comparatively small* gonostylus long* penis long and wide.
Language: English
Topic: Fossil Insects in Amber
Domain: Life Sciences
Open Access status: green
OpenAlex ID: W6893177274
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