Hylis

des Gozis, 1886

Species Guides

Hylis is a of false click beetles ( Eucnemidae) containing approximately 10 described distributed across Europe and North America. The genus was established by Maurice des Gozis in 1886 and is classified in the Melasinae and tribe Epiphanini. Several European species, notably Hylis olexai, have become established as in eastern North America. The genus includes both native Nearctic species and introduced Palearctic species, with ongoing taxonomic revisions clarifying species boundaries and distributions.

Hylis terminalis by no rights reserved, uploaded by Nick Bédard. Used under a CC0 license.

Pronunciation

How to pronounce Hylis: /ˈhʌlɪs/

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Identification

of Hylis are distinguished from other Eucnemidae by character states detailed in recent taxonomic revisions, including features of the pronotum, , and . Hylis olexai and H. delicatus can be separated from H. irvinei and H. terminalis by diagnostic characters provided in identification keys for Nearctic species. Larvae of H. olexai have been redescribed and illustrated, providing characters for distinguishing this species from .

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Distribution

Europe: documented from Western and Central Europe including Germany, Denmark, Norway, and Sweden; North America: native in eastern and central United States and Canada, with of H. olexai established in northeastern United States (Connecticut, Illinois, Maine, Massachusetts, New Hampshire, New Jersey, New York, Ohio, Pennsylvania, Rhode Island, Vermont, Virginia, West Virginia, Wisconsin) and Canada (Ontario, Quebec).

Life Cycle

Larvae have been described and illustrated for at least Hylis olexai; complete details for the are not documented.

Human Relevance

Hylis olexai is a documented in North America, representing a successful establishment of a European eucnemid in the Nearctic region. The species has been recorded from multiple U.S. states and Canadian provinces, indicating ongoing range expansion.

Similar Taxa

Other Eucnemidae generaHylis is distinguished from other false click beetle by characters of the Melasinae and tribe Epiphanini, including specific pronotal and elytral features detailed in taxonomic keys.
Hylis irvinei, H. terminalisThese are similar to H. olexai and H. delicatus but can be separated by diagnostic characters of female and other features detailed in recent taxonomic revisions.

More Details

Taxonomic history

The was originally erected by Maurice des Gozis in 1886 (not 1866 as sometimes cited). It has been treated under the synonym Hypocoelus in some literature.

Adventive species success

The establishment of Hylis olexai in North America is discussed in relation to the broader pattern of successful eucnemid establishment in the Nearctic region.