Polymera

Wiedemann, 1821

Species Guides

Polymera rogersiana

Polymera is a of crane flies (Diptera: Limoniidae) established by Wiedemann in 1821. The genus contains approximately 60 described organized into two subgenera: Polymera (sensu stricto) and Polymerodes. Species occur across the Americas, with numerous described by Charles Paul Alexander throughout the 20th century. The genus is characterized by distinctive wing venation and genitalic structures typical of the Limnophilinae .

Polymera by (c) Douglas, some rights reserved (CC BY), uploaded by Douglas. Used under a CC-BY license.

Polymera by (c) Daniel Mesa, some rights reserved (CC BY), uploaded by Daniel Mesa. Used under a CC-BY license.

Pronunciation

How to pronounce Polymera: //pɒˈlɪmɛrə//

These audio files are automatically generated. While they are not always 100% accurate, they are a good starting point.

Identification

Members of Polymera can be distinguished from other Limoniidae by features of the wing venation and male terminalia. The subgenus Polymerodes was established by Alexander in 1920 based on differences in antennal structure and wing patterning. -level identification requires examination of genitalic characters and is documented in Alexander's extensive taxonomic revisions. No reliable external morphological characters for rapid field identification have been published.

Images

Distribution

of Polymera have been documented from North, Central, and South America, as well as the Caribbean. Specific locality records include the United States (southeastern region), Mexico, Central America, and South America extending to Argentina. The subgenus Polymerodes appears to have a more restricted distribution based on available species descriptions.

Similar Taxa

LimnophilaBoth belong to Limnophilinae and share similar overall body plan and wing venation patterns; separation requires examination of male genitalic structures and specific wing configurations.
LimnophilellaOverlaps in distribution and preference; distinguished by differences in wing venation details and antennal structure.

More Details

Taxonomic History

The was extensively revised by Charles Paul Alexander, who described the majority of known between 1911 and 1979. Alexander also established the subgenus Polymerodes in 1920 to accommodate species with distinct antennal and wing characteristics.

Species Diversity

The includes at least 60 described , with the majority placed in the nominate subgenus Polymera. Several species have been described from cave (e.g., P. cavernicola), suggesting troglomorphic adaptations in some lineages.