Derostenus

Westwood, 1833

Species Guides

Derostenus freemani

Derostenus is a of small in the Eulophidae, first described by Westwood in 1833. The genus contains five recognized distributed across Asia, Europe, and North America. European and North American species are solitary endoparasitoids of leaf-mining larvae in the genus Stigmella (Nepticulidae), while the of Asian species remains unknown. Two species groups have been established based on morphological differences: the gemmeus group (European and North American species) and the sulciscuta group (Asian species).

Derostenus by (c) Paul Cook, some rights reserved (CC BY), uploaded by Paul Cook. Used under a CC-BY license.

Derostenus arizonensis by the Smithsonian. Used under a CC0 license.

Derostenus bifoveolatus by the Smithsonian. Used under a CC0 license.

Pronunciation

How to pronounce Derostenus: //dɛˈɹoʊstənəs//

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Images

Distribution

Asia (Japan and associated regions), Europe, and North America. GBIF records document occurrences in California, Florida, Hawaii, and Texas.

Host Associations

Stigmella - endoparasitoidSolitary endoparasitoid in larvae; European and North American only
Nepticula - records from North American ; Nepticula is a former generic name for some Stigmella species

Life Cycle

Solitary endoparasitoid development within larvae. Specific details of laying, larval instars, site, and stage have not been documented in available sources.

Ecological Role

Acts as a agent of leaf-mining Lepidoptera. of Stigmella in forest and woodland .

More Details

Taxonomic history

Yoshimoto (1973) proposed a subgeneric division (Nearctostenus) for North American , but this was abandoned in favor of two informal species-groups: gemmeus (European and North American) and sulciscuta (Asian). Derostenus albipes Yoshimoto was synonymized with D. freemani Yoshimoto.

Species composition

Five recognized: two Asian (D. japonicus, D. sulciscuta), two European (D. conformis, D. laevifrons, D. punctiscuta), and one North American (D. freemani). Lectotypes designated for three European species by Hansson (1986).