Zigrasolabidinae Engel, 2022

Ancheng Peng, Michael S. Engel, Yuhui Zhuang, Ziying Wu, Chen Feng & Yu Liu, 2022, A new genus of striped earwigs allied to Zigrasolabis in mid- Cretaceous Kachin amber (Dermaptera: Labidurida), Cretaceous Researc 139, pp. 1-7 : 2-3

Subfamily Zigrasolabidinae Engel , subfam. nov.

Type genus: Zigrasolabis Engel and Grimaldi, 2014 .

Diagnosis. Temples typically with prominent, erect, bristles; flagellomere I longer than combined lengths of flagellomere II and III; tegmina and hind wings present and well-developed, lateral margins without longitudinal ridge (as in Labidurinae, ridge present in Nalinae); mesosternum rectangular, not strongly tapering posteriorly (strongly trapezoidally narrowed posteriorly in Allostethinae); metafemur longer than pronotum; tarsomere II slanted apically (not scapiform), with tarsomere III arising from slanted dorsal surface of tarsomere II, either not lobed nor expanded apically (as in Labidurinae), or with slight, narrowed extension; cercal forceps of female comparatively simple, those of male broadly arched; apices of male parameres bluntly rounded, incurved, not abruptly acute apically (abruptly acute and pointed apically in Labidurinae); paired genital lobes projected caudad, apically blunt, not exceeding parameres.

Included genera. The subfamily currently includes Zigrasolabis Engel and Grimaldi and Tricholabidura , gen. nov. The genus Acantholabis Mao et al. perhaps also belongs here ( Mao et al., 2020a).

Remarks. The genus can be placed in Labiduridae , as currently circumscribed, based on the following combination of features: Epidermapteran cervical sclerites (i.e., ‘forficuloid neck’), thoracic segments of roughly equivalent widths (i.e., prothorax not prominently narrowed relative to pterothorax), tegmina and hind wings typically well developed (rarely secondarily absent), pronotum long and broad with meso- and metanota truncate posteriorly, prosternum subparallel (sometimes slightly constricted posteriorly), generally stout and not strongly compressed, male genitalia paired (paired lobes), with virgae bearing basal vesicle (vesicle not visible in current fossil, as preserved). Labidurid monophyly remains to be determined conclusively and we follow the current circumscription of the family pending future cladistic analyses and revisions of dermapteran classification. Putative apomorphies of Zigrasolabidinae are the rectangular mesosternum, male parameres incurved and bluntly rounded, and the loss of the lateral ridge of the tegmina. In addition, the combination of these features with flagellomere I longer than flagellomeres II and III, the slanted second tarsomere, and the erect bristles of the temple is a further unique combination in the lineage.

ZooBank LSID: This nomenclatural act is registered in ZooBank (www.zoobank.org), the official registry of the International Commission on Zoological Nomenclature, with the following LSID: urn:lsid:zoobank.org:act:53014F06-F255-4279-9ECE- 7A369248B6A4.