Toxomerus jussiaeae

Vigé, 1939

Orange-backed Calligrapher

Toxomerus jussiaeae is a of hover fly in the Syrphidae, first described by Vigé in 1939. It belongs to the Toxomerus, a diverse group of small syrphid flies with over 144 species in the Neotropics. The species is known by the "Orange-backed Calligrapher." Like other members of its genus, it is likely a as an , though specific ecological details for this species remain poorly documented.

Toxomerus jussiaeae by (c) Judy Gallagher, some rights reserved (CC BY). Used under a CC-BY license.

Toxomerus jussiaeae by (c) eamonccorbett, some rights reserved (CC BY), uploaded by eamonccorbett. Used under a CC-BY license.

Pronunciation

How to pronounce Toxomerus jussiaeae: /ˌtɔksəˈmɛrəs ˌdʒuˈsjaɪiː/

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Identification

Toxomerus are small, slender syrphid flies often with distinctive abdominal patterning. T. jussiaeae can be distinguished from by specific characters on the lateral and portions of the , though detailed diagnostic features for this species are not readily available in accessible literature. The Toxomerus is frequently mistaken for the similar genus Allograpta; both require examination of subtle morphological characters for accurate identification. Species-level identification within Toxomerus typically requires knowledge and reference to original descriptions or specialized keys.

Images

Distribution

The is documented in the Neotropical region. Specific locality records are sparse in the provided sources, though the Toxomerus is broadly distributed across the Americas.

Similar Taxa

AllograptaSimilar small, slender body form and abdominal patterning; both are frequently confused and require examination of thoracic characters for separation.
Episyrphus balteatusSimilar coloration and patterning, though this is an Old World distinguished by secondary black bands on the 3rd and 4th abdominal ; Toxomerus species are New World.

More Details

Taxonomic Note

The Toxomerus was long assumed to have exclusively predatory larvae, but some have been discovered feeding on pollen, highlighting ongoing knowledge gaps in the of this diverse genus.

Research Context

Toxomerus , including T. jussiaeae, are among the understudied syrphid flies that present challenges for identification due to limited available keys and the large number of Neotropical species in the .