DOI: 10.5061/dryad.4b8gthtq9
title: Data from: A cretaceous fly trap? Remarkable abdominal modification in a fossil wasp

description: The dataset contains all original .TIF format photos of the CT scanning
 data about Cretaceous Sirenobethylid wasp, No. CNU-HYM-MA2015119. Number
 of the TIFF images is 1718. Volume rendering and 3D
 reconstruction were performed using the open-source software Drishti 2.4
 [1], made by the Australian National University. The specimen was
 collected from Noije Bum hill, about 18 km southwest of Tanai Village in
 the Hukawng Valley, northern Myanmar (26° 21' 33.41" N, 96°
 43' 11.88" E) [2, 3]. All amber specimens are stored in the Key
 Lab of Insect Evolution and Environmental Changes, College of Life
 Sciences, Capital Normal University (CNUB; Dong Ren, Curator), Beijing,
 China [4, 5]. References: Limaye A. 2012 Drishti: a volume exploration and
 presentation tool. Developments in X-ray Tomography VIII. International
 Society for Optics and Photonics, 85060X. (doi:10.1117/12.935640)
 Cruickshank RD, Ko K. 2003 Geology of an amber locality in the Hukawng
 Valley, northern Myanmar. J Asian Earth Sci. 21, 441–455.
 (doi:10.1016/S1367-9120(02)00044-5) Shi GH, Grimaldi DA, Harlow GE, Wang
 J, Wang J, Yang MC, Li WY, Li QL, Li XH. 2012 Age constraint on Burmese
 amber based on U-Pb dating of zircons. Cretaceous Res. 37,
 155–163. (doi:10.1016/j.cretres.2012.03.014) Wang Z, Vilhelmsen L,
 Rasnitsy AP, Viertler A, Shih CK, Wen SS, Yang HR, Wu Q, Zhang YJ, Ren D,
 Gao TP. 2024. Specialized ovipositor sensilla of Cretaceous wasps
 (Insecta: Hymenoptera) possible reveal a unique way of host detecion.
 Cladistics. 40, 526–537. Wu Q, Radchenko AG, Engel MS, Li XQ, Yang HR, Li
 XR, Shih CK, Ren D, Gao TP. 2024. Cretaceous crown male ant reveals the
 rise of modern lineages. Zool. Res. 45, 983–989.
description: The amber No. CNU-HYM-MA2015119 was scanned at the micro-CT
 laboratory of YKLP (Yunnan Key Laboratory for Paleobiology) with an X-ray
 microscope (3D-XRM), Zeiss Xradia 520 versa. Scanning parameters are as
 follows: beam strength: 60 kV/5w, filter: no, resolution: 1.94 μm,
 exposure time: 5 s, number of TIFF images: 1718.
description: # Data from: A cretaceous fly trap? Remarkable abdominal modification in a
 fossil wasp
 [https://doi.org/10.5061/dryad.4b8gthtq9](https://doi.org/10.5061/dryad.4b8gthtq9) ## Description of the data and file structure **CT Scanning Data of Cretaceous Sirenobethylid wasp** We described a new insect, †*Sirenobethylus charybdis*, based on Cretaceous Kachin amber and assigned the species within Chrysidoidea of Hymenoptera. The specimen was collected from Noije Bum hill, about 18 km southwest of Tanai Village in the Hukawng Valley, northern Myanmar (26° 21' 33.41" N, 96° 43' 11.88" E). All amber specimens are stored in the Key Lab of Insect Evolution and Environmental Changes, College of Life Sciences, Capital Normal University (CNUB; Dong Ren, Curator), Beijing, China. The new species of †*Sirenobethylus charybdis* Wu, Vilhelmsen & Gao sp. nov. is registered under the following LSID numbers in Zoobank: urn:lsid:zoobank.org:act:75AEB71E-2DCD-4CBA-9EB9-5DEE7CFD0465.  The dataset contains all original .TIF format photos of the CT scanning data about this new species of wasp, paratype of No. CNU-HYM-MA2015119. The three photos (named 1.PNG - 3.PNG) display the images of the insect's abdomen in different views in the CT scan. The image named 4.PNG shows the range of the CT scan. All the results of the CT scan are stored in the folder named "Tiff", containing a total of 1718 scanned images, all in .tif format. Researchers can use these images to reconstruct both external and internal structures of the insect's abdomen. Based on the results reconstructed from CT scan, we can see that †*Sirenobethylus* display unique morphological modifications on the tip of the abdomen consisting of three flap formed from sternum 6 and tergum and sternum 7, which is unlike anything previously reported from any extant wasp or indeed any insect known to us. ### Files and variables #### File: CT\_Scanning\_Data\_for\_Sirenobethylid.zip **Description:** Original .TIF format photos of the CT scanning data Cretaceous wasp, No. CNU-HYM-MA2015119.