DOI: 10.5061/dryad.h6j0g4p
title: Data from: Systematics of the ant genus Proceratium Roger (Hymenoptera, Formicidae, Proceratiinae) in China – with descriptions of three new species based on micro-CT enhanced next-generation-morphology

description: The genus Proceratium Roger, 1863 contains cryptic, subterranean ants that
 are seldom sampled and rare in natural history collections. Furthermore,
 most Proceratium specimens are extremely hairy and, due to their enlarged
 and curved gaster, often mounted suboptimally. As a consequence, the
 poorly observable physical characteristics of the material and its
 scarcity result in a rather challenging alpha taxonomy of this group. In
 this study, the taxonomy of the Chinese Proceratium fauna is reviewed and
 updated by combining examinations of traditional light microscopy with
 x-ray microtomography (micro-CT). Based on micro-CT scans of seven out of
 eight species, virtual 3D surface models were generated that permit
 in-depth comparative analyses of specimen morphology in order to overcome
 the difficulties to examine physical material of Proceratium. Eight
 Chinese species are recognized, of which three are newly described:
 Proceratium bruelheidei Staab, Xu & Hita Garcia, sp. n. and P.
 kepingmai sp. n. belong to the P. itoi clade and have been collected in
 the subtropical forests of southeast China, whereas P. shohei sp. n.
 belongs to the P. stictum clade and it is only known from a tropical
 forest of Yunnan Province. Proceratium nujiangense Xu, 2006 syn. n. is
 proposed as a junior synonym of P. zhaoi Xu, 2000. These taxonomic acts
 raise the number of known Chinese Proceratium species to eight. In order
 to integrate the new species into the existing taxonomic system and to
 facilitate identifications, an illustrated key to the worker caste of all
 Chinese species is provided, supplemented by species accounts with
 high-resolution montage images and still images of volume renderings of 3D
 models based on micro-CT. Moreover, cybertype datasets are provided for
 the new species, as well as digital datasets for the remaining species
 that include the raw micro-CT scan data, 3D surface models, 3D rotation
 videos, and all light photography and micro-CT still images. These
 datasets are available online (Dryad, Staab et al. 2018,
 http://dx.doi.org/10.5061/dryad.h6j0g4p).
description: Cybertype_P.bruehlheidei_CASENT0790023Cybertype dataset for Proceratium bruehlheidei (CASENT0790023) holotype worker: complete micro-CT scanning raw dataset (DICOM format - 993 slices), 3D surface (ply format), 3D rotation video (mp4 format), 3D model volume rendering snapshots (tiff format), and montage photos (tiff format)Virtual dataset_P.itoi_OKENT0016142Cybertype dataset for Proceratium itoi (OKENT0016142) nontype worker: complete micro-CT scanning raw dataset (DICOM format - 993 slices), 3D surface (ply format), 3D rotation video (mp4 format), 3D model volume rendering snapshots (tiff format), and montage photos (tiff format)Virtual dataset_P.japonicum_CASENT0790834Virtual dataset for Proceratium japonicum (CASENT0790834) nontype worker: complete micro-CT scanning raw dataset (DICOM format - 993 slices), 3D surface (ply format), 3D rotation video (mp4 format), 3D model volume rendering snapshots (tiff format), and montage photos (tiff format)Cybertype_P.kepingmai_CASENT0790031Cybertype dataset for Proceratium kepingmai (CASENT0790031) holotype worker: complete micro-CT scanning raw dataset (DICOM format - 993 slices), 3D surface (ply format), 3D rotation video (mp4 format), 3D model volume rendering snapshots (tiff format), and montage photos (tiff format)Virtual dataset_P.longigaster_CASENT0790673Virtual dataset for Proceratium longigaster (CASENT0790673) nontype worker: complete micro-CT scanning raw dataset (DICOM format - 993 slices), 3D surface (ply format), 3D rotation video (mp4 format), 3D model volume rendering snapshots (tiff format), and montage photos (tiff format)Cybertype_P.shohei_CASENT0717686Cybertype dataset for Proceratium shohei (CASENT0717686) holotype worker: complete micro-CT scanning raw dataset (DICOM format - 993 slices), 3D surface (ply format), 3D rotation video (mp4 format), 3D model volume rendering snapshots (tiff format), and montage photos (tiff format)Virtual dataset_P.zhaoi_CASENT0790671Virtual dataset for Proceratium zhaoi (CASENT0790671) paratype worker: complete micro-CT scanning raw dataset (DICOM format - 993 slices), 3D surface (ply format), 3D rotation video (mp4 format), 3D model volume rendering snapshots (tiff format), and montage photos (tiff format)Virtual dataset_P.zhaoi_nujiangense_CASENT0790672Virtual dataset for Proceratium zhaoi (CASENT0790672) paratype worker of junior synonym P. nujiangense: complete micro-CT scanning raw dataset (DICOM format - 993 slices), 3D surface (ply format), 3D rotation video (mp4 format), 3D model volume rendering snapshots (tiff format), and montage photos (tiff format)