Difference between revisions of "Astreptolabidinae"
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Latest revision as of 11:42, 24 September 2011
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BibTeX: @article{Engel2011ZooKeys130, RIS/ Endnote: TY - JOUR Wikipedia/ Citizendium: <ref name="Engel2011ZooKeys130">{{Citation See also the citation download page at the journal. |
Ordo: Dermaptera
Familia: Pygidicranidae
Name
Engel subfam. n. – Wikispecies link – ZooBank link – Pensoft Profile
Type genus
Astreptolabis Engel, gen. n.
Diagnosis
Female: Minute earwigs (ca. 3.5 mm in length); somewhat dorsoventrally compressed; densely setose, but not chaetulose; integument dull and matt. Head prognathous, broad, slightly broader than anterior border of pronotum (Fig. 1), apparently tumid, posterolateral corners gently curved, posterior border straight; compound eyes well developed, prominent, separated from posterior border of head by slightly less than compound eye length, setose; ocelli absent; antenna with at least 14 antennomeres (an unusually small number for basal Neodermaptera and likely autapomorphic for this subfamily), scape stout, pedicel longer than wide, flagellomeres longer than wide, progressively more elongate from flagellomere II–X, with X–IV subequal in size. Pronotum exceptionally large (Fig. 1), anterior margin relatively straight, posterior border gently convex, lateral borders slightly divergent in anterior half, flared and convex in posterior half, posteriorly broader than head, all borders ecarinate. Tegmina present, without venation, symmetrical, elongate, outer margins convex, apex gently curved and tapering to midline (not truncate), covering first four abdominal segments (Fig. 1); hind wings present, with squama slightly exposed from under tegmina. Femora apparently not carinulate; tarsi trimerous, second tarsomere shortest, not extending beneath base of third tarsomere; pretarsal ungues simple; arolium absent. Abdomen slender, elongate (eight visible segments, typical for females), lateral margins parallel-sided, most segments only slightly wider than long, apicalmost segment with straight apical margin, without tubercles. Cerci symmetrical, slightly longer than apicalmost three abdominal segments, straight, tubular, gently tapering to acute apex, densely covered in microtrichia, without tubercles, dentition, or serrations, broadly separated at base (Fig. 1); pygidium not evident; valvulae not exposed at abdominal apex.
Male: Unknown.
Taxon Treatment
- Engel, M; 2011: New earwigs in mid-Cretaceous amber from Myanmar (Dermaptera, Neodermaptera) ZooKeys, 130: 137-152. doi
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