Bezzia

Kieffer, 1899

Species Guides

3

Bezzia is a of biting midges in the Ceratopogonidae containing more than 310 described . The genus includes species with aquatic stages. females of some species possess abdominal eversible sacs, the function of which remains uncertain. Larvae are and show morphological adaptations consistent with .

Bezzia nobilis by (c) Victor Engel, some rights reserved (CC BY), uploaded by Victor Engel. Used under a CC-BY license.Bezzia nobilis P1560210a by xpda. Used under a CC BY-SA 4.0 license.

Pronunciation

How to pronounce Bezzia: /ˈbɛtsiə/

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Images

Habitat

Freshwater aquatic environments; stages are aquatic.

Distribution

Recorded from Colombia (Antioquia, Chocó, Cundinamarca, Tolima, Valle del Cauca), Denmark, Norway, and Martín García island in the La Plata river between Argentina and Uruguay.

Diet

Larvae are ; specific prey items not documented in available sources.

Life Cycle

Aquatic stages include fourth instar larva and pupa; complete details not documented.

Behavior

females of Bezzia varicolor possess abdominal eversible sacs attached to internal tergal apodemes; histological examination found no glandular tissue associated with these structures, and their function remains uncertain. Proposed functions for such sacs across related include roles in mating and mimicry to facilitate , though these remain speculative.

Ecological Role

; larvae function as in freshwater aquatic .

Similar Taxa

  • PalpomyiaAlso possesses abdominal eversible sacs in females; both belong to tribe Palpomyiini and share this distinctive morphological feature.
  • StenoxenusPossesses abdominal eversible sacs in females; similar morphological trait linking these within Ceratopogonidae.

More Details

Eversible sacs function

The abdominal eversible sacs of female Bezzia varicolor were examined histologically and found to lack glandular tissue, rejecting earlier hypotheses of a glandular function. Alternative functions proposed for such structures across the broader group of possessing them include reproductive roles and mimicry of to enhance predatory success.

Sources and further reading