Stenichnus

Thomson, C. G., 1859

Species Guides

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Stenichnus is a of minute rove beetles in the Scydmaeninae, characterized by distinctive larval with complex chaetotaxy (setal patterns). The genus is distributed across the Palaearctic region with some Nearctic representatives. Larvae have been studied through shed skins and rearing to , revealing significant morphological variation between that complicates assessments.

Stenichnus by (c) Alexis Tinker-Tsavalas, some rights reserved (CC BY), uploaded by Alexis Tinker-Tsavalas. Used under a CC-BY license.Stenichnus.scutellaris.-.calwer.10.19 by Emil Hochdanz . Used under a Public domain license.Canadian beetles (10.3897-zookeys.894.37862) Figures 11, 12 by Pentinsaari M, Anderson R, Borowiec L, Bouchard P, Brunke A, Douglas H, Smith A, Hebert P (2019) DNA barcodes reveal 63 overlooked species of Canadian beetles (Insecta, Coleoptera). ZooKeys 894: 53-150. https://doi.org/10.3897/zookeys.894.37862. Used under a CC BY 4.0 license.

Pronunciation

How to pronounce Stenichnus: //stɛˈnɪknəs//

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Identification

are minute beetles in the -like stone Scydmaeninae. Larvae can be distinguished by their chaetotaxy, though specific identification requires comparison of setal patterns on the , thoracic tergites, and abdominal tergites; the epicranial and frontal arm placement appear to vary between .

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Distribution

Palaearctic region; records from Denmark, Norway, and Sweden. One (Stenichnus turbatus) occurs in the Nearctic region.

Life Cycle

Complete with , larva, pupa, and stages. Mature larvae are known from shed skins; development includes a larval stage that can be reared to adulthood under laboratory conditions.

Behavior

Larvae and exhibit feeding that has been observed in laboratory settings; adult longevity has been documented under laboratory conditions.

Similar Taxa

  • ScydmaenusBoth belong to Scydmaeninae and share minute body size and -like appearance; Stenichnus is distinguished by tribal placement in Stenichnini and specific chaetotaxic patterns.

Misconceptions

The name 'Stenichnus' was previously used as an ichnogenus for fossil footprints in the Supai Formation; this is unrelated to the and represents a homonym.

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