Listronotus sparsus

(Say, 1832)

Listronotus sparsus is an underwater weevil in the Curculionidae, described by Say in 1832. It is one of relatively few weevil adapted to aquatic or semi-aquatic . The species occurs in North America, with records from Canada including Alberta, Manitoba, New Brunswick, and Nova Scotia. Like other members of the Listronotus, it likely has associations with aquatic vegetation, though specific ecological details remain poorly documented.

Listronotus sparsus by (c) Dan MacNeal, some rights reserved (CC BY), uploaded by Dan MacNeal. Used under a CC-BY license.

Pronunciation

How to pronounce Listronotus sparsus: /ˌlɪstroʊˈnoʊtəs ˈspɑrsəs/

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Habitat

Aquatic or semi-aquatic environments; specific plants or microhabitat preferences have not been documented.

Distribution

North America: Canada (Alberta, Manitoba, New Brunswick, Nova Scotia). Distribution in the United States has not been clearly documented.

More Details

Aquatic Adaptation

The designation of L. sparsus as an 'underwater weevil' indicates morphological or behavioral adaptations for submersion, though specific mechanisms (such as respiration or other cuticular modifications) have not been described in the available literature.

Data Deficiency

Despite being described nearly two centuries ago, L. sparsus remains poorly known. The small number of iNaturalist observations (9) and minimal literature references suggest it is either genuinely rare, cryptic, or undercollected due to its aquatic habits.