Heloridae

Genus Guides

Helorus

is a of parasitic in the superfamily Proctotrupoidea. The family is represented by a single extant , Helorus, with approximately 12-18 distributed worldwide. Extant members are solitary endoparasitoids of Chrysopidae (green lacewing) larvae. The family is notable for its extensive fossil record, with numerous extinct genera documented from Jurassic and Cretaceous deposits in Asia and Europe.

Helorus anomalipes by (c) Will Kuhn, some rights reserved (CC BY), uploaded by Will Kuhn. Used under a CC-BY license.

Pronunciation

How to pronounce Heloridae: //hɛˈlɔrɪˌdiː//

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Identification

Extant are small, slender . -level identification within Helorus requires examination of morphological characters including antennal structure, wing venation, and body coloration patterns. has been successfully applied to distinguish European species, though not all species are represented in reference databases.

Images

Distribution

Worldwide. Documented from Europe (including Denmark, Norway, Sweden, Turkey), Central America (Honduras, Guatemala), and other regions. Fossil are known from Middle Jurassic to Early Cretaceous deposits in China, Russia, Kazakhstan, Mongolia, South Korea, and North Korea.

Host Associations

Chrysopidae - endoparasitoidlarval stage of green lacewings

Life Cycle

Solitary endoparasitoids that develop inside larvae. The uses the cocoon constructed by the host chrysopid larva to complete its own pupal development.

Behavior

Solitary ; females locate and parasitize larvae.

Ecological Role

agent of green lacewing .

Similar Taxa

DrynidaeBoth are of parasitic in Proctotrupoidea, but Drynidae are ectoparasitoids of Hemiptera (leafhoppers, planthoppers) rather than endoparasitoids of Neuroptera.
IsmaridaeRelated proctotrupoid , but Ismaridae are of Hemiptera (cicadas) or hyperparasitoids of Drynidae, not parasitoids of Chrysopidae.

More Details

Fossil Record

has an exceptionally rich fossil record compared to its extant diversity. Over 10 extinct are documented from the Middle Jurassic (Callovian) through Early Cretaceous (Aptian-Albian), primarily from lacustrine deposits in northeastern China (Yixian, Laiyang, Jinju formations) and Transbaikalia (Turga, Russia). This fossil diversity contrasts sharply with the single surviving genus Helorus.