Scelionidae
Guides
Acroclisoides
Acroclisoides is a genus of chalcid wasps in the family Pteromalidae, established in 1915. Species within this genus are obligate hyperparasitoids that attack the pupal stage of scelionid primary parasitoids developing within pentatomid (stink bug) eggs. The genus has a broad geographic distribution spanning the Oriental, Afrotropical, Australian, and Holarctic regions. Acroclisoides sinicus, the most studied species, has recently expanded from Asia to Europe and North America, where it poses potential risks to biological control programs targeting invasive stink bugs such as Halyomorpha halys.
Baeoneurella
Baeoneurella is a genus of parasitoid wasps in the family Scelionidae, established by Alan Dodd in 1913. Members of this genus are small, solitary wasps that develop as parasitoids of insect eggs. The genus is poorly documented in scientific literature, with few species described and minimal biological data available.
Baeoneurella bicolor
Baeoneurella bicolor is a species of parasitoid wasp in the family Scelionidae, a group of minute wasps that parasitize the eggs of various insects. The species epithet 'bicolor' suggests a two-toned color pattern, though specific morphological details remain undocumented in available sources. Scelionidae are among the most diverse families of parasitoid wasps, with most species being egg parasitoids of Orthoptera, Hemiptera, and other insect groups. The genus Baeoneurella is poorly known and represented by very few specimens in collections.
Baeus
micro-flea wasp
Baeus is a genus of minute parasitoid wasps in the family Scelionidae, remarkable for extreme sexual dimorphism. Females are wingless, highly compact, and flea-like in appearance with reduced or fused body segments, while males possess wings and a more typical scelionid morphology. All species are endoparasitoids of spider eggs, developing inside the oothecae (egg sacs) of diverse spider families. The genus has a cosmopolitan distribution across all continents except Antarctica, with greatest species diversity documented along the eastern seaboard of Australia.
Calliscelio
Calliscelio is a genus of parasitoid wasps in the family Scelionidae, comprising 97 described species worldwide. The genus was erected by Ashmead in 1893. Members are egg parasitoids of crickets (Gryllidae), with at least one species, C. elegans, recognized as a widespread "tramp species" likely dispersed by human commerce.
Calliscelio rubiclavus
Calliscelio rubiclavus is a species of parasitoid wasp in the family Scelionidae. Members of this genus are egg parasitoids, primarily targeting the eggs of Orthoptera (grasshoppers, crickets, and katydids). The species was described in the 20th century as part of taxonomic revisions of the genus Calliscelio. Like other scelionids, it likely plays a role in regulating orthopteran populations.
Calotelea
Calotelea is a genus of parasitoid wasps in the family Scelionidae, first described by Westwood in 1837. Members of this genus are part of the diverse platygastroid wasp fauna, which are primarily egg parasitoids of insects and other arthropods. The genus is represented by only a handful of observations on iNaturalist, suggesting it is either genuinely rare, undercollected, or restricted to specific habitats. As with other scelionids, species in this genus likely play important roles in regulating populations of their hosts through parasitism.
Duta
Duta is a genus of parasitoid wasps in the family Scelionidae, first described by Nixon in 1933. Members of this genus belong to the superfamily Platygastroidea, a group of small wasps that primarily parasitize insect eggs. The genus is part of the subfamily Scelioninae, which contains numerous genera of egg parasitoids with significant ecological importance in biological control.
Duta virginiensis
A species of parasitoid wasp in the family Scelionidae, order Hymenoptera. Members of this family are typically egg parasitoids of various insects, though specific biological details for this species remain undocumented in available sources. The genus Duta belongs to the superfamily Platygastroidea, a group of small wasps characterized by reduced wing venation and often associated with concealed host habitats.
Dyscritobaeus
Dyscritobaeus is a genus of parasitoid wasps in the family Scelionidae, first described by Perkins in 1910. These small wasps belong to the superfamily Platygastroidea, a group characterized by reduced wing venation and often associated with egg parasitism. The genus is part of the diverse Scelioninae subfamily, which contains numerous genera of minute wasps that attack the eggs of various insects. Records of this genus are sparse, with limited observational data available.
Euschistus servus
Brown Stink Bug
Euschistus servus, commonly known as the brown stink bug, is a native North American pentatomid species distributed across Central America and North America. It is a significant agricultural pest in the southern United States, feeding on a wide range of crops including soybeans, cotton, corn, peanuts, peaches, and pecans. The species is highly mobile, capable of dispersing up to 15.9 km in flight mill studies, and exhibits seasonal movement between crop hosts and non-crop habitats. Two subspecies are recognized: E. s. servus and E. s. euschistoides.
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Idris is a large genus of parasitic wasps in the family Scelionidae, first described by Förster in 1856. The genus contains over 300 described species worldwide, with many more remaining undescribed. Most species are egg parasitoids, historically associated with spider eggs, though at least one species has been documented parasitizing stink bug eggs. Members are typically very small, measuring 1–2 mm in length, with reduced wing size that facilitates access to concealed host eggs.
Macroteleia carinata
Macroteleia carinata is a species of parasitoid wasp in the family Scelionidae, described by Ashmead in 1894. The genus Macroteleia comprises approximately 131 described species worldwide, with members believed to be parasitoids of eggs of longhorned grasshoppers (Orthoptera: Tettigoniidae). The species is recorded from Brazil (Pará state).
Oethecoctonus
Oethecoctonus is a genus of small parasitoid wasps in the family Scelionidae, established by Ashmead in 1893. The genus contains approximately six described species distributed worldwide. In North America, three species are recognized: O. oecanthi (the type species), O. ophrynopus, and O. pleuralis. Members of this genus are known to be parasitoids of orthopteran eggs.
Palaeogryon
Palaeogryon is a genus of parasitoid wasps in the family Scelionidae, first described by Masner in 1969. The genus belongs to the subfamily Scelioninae, a group of minute wasps that parasitize eggs of insects and other arthropods. As with many scelionid genera, Palaeogryon is characterized by morphological adaptations for locating and penetrating host eggs. The genus is part of the diverse platygastroid lineage within Hymenoptera.
Telenomus
Telenomus is a genus of minute egg parasitoid wasps in the subfamily Telenominae, family Scelionidae. First described by Alexander Henry Haliday in 1833, species in this genus develop as parasitoids within the eggs of other insects, primarily targeting Lepidoptera and Hemiptera. Several species, notably T. remus and T. podisi, are important biological control agents used in integrated pest management programs against agricultural pests including fall armyworm (Spodoptera frugiperda) and stink bugs (Euschistus spp.). The genus exhibits a cosmopolitan distribution with particular significance in tropical and subtropical agricultural systems.
Telenomus calvus
Telenomus calvus is a phoretic egg parasitoid of the spined soldier bug, Podisus maculiventris. Females exhibit a distinctive riding behavior, attaching to host bodies at 25 different locations with preference for the pronotum and femurs, using hypertrophied arolia for secure attachment. They dismount specifically during host oviposition to parasitize egg masses. The species has a relatively low fecundity of approximately 22 progeny per female, with female production peaking early in life and declining rapidly, while male production remains low and constant.
Telenomus podisi
Telenomus podisi is an egg parasitoid wasp first described by William Harris Ashmead in 1893. It is a primary natural enemy of stink bugs (Pentatomidae), with Euschistus heros documented as its principal host. The species has been extensively studied for biological control applications in soybean and other agricultural systems, particularly in Brazil. Laboratory studies demonstrate that females can form olfactory memories during immature development, with learned preferences persisting up to 72 hours post-emergence. The species is susceptible to several insecticides including imidacloprid, which is lethal, while some organic products show greater selectivity.
Telenomus tabanivorus
Telenomus tabanivorus is a species of egg parasitoid wasp in the family Scelionidae, first described by Ashmead in 1895. The species epithet 'tabanivorus' suggests an association with tabanid flies (horse flies and deer flies) as hosts, though specific host records remain poorly documented in the accessible literature. As a member of the genus Telenomus, it belongs to a group of parasitoid wasps widely utilized in biological control programs for their effectiveness in suppressing pest populations through egg parasitism.
Trisacantha
Trisacantha is a genus of parasitoid wasps in the family Scelionidae, first described by Ashmead in 1887. Members of this genus are minute wasps that develop as parasitoids of insect eggs. The genus is placed within the superfamily Platygastroidea, a group characterized by reduced wing venation and specialized host-finding behaviors. Only one observation of this genus is currently documented on iNaturalist, indicating either rarity or undercollection.
Trissolcus
samurai wasps
Trissolcus is a genus of minute parasitoid wasps in the family Scelionidae, comprising at least 180 described species. Members are obligate egg parasitoids of true bugs in the infraorder Pentatomomorpha, including stink bugs (Pentatomidae). The genus has gained significant attention due to the biological control potential of several species, particularly Trissolcus japonicus (the "samurai wasp"), against the invasive brown marmorated stink bug (Halyomorpha halys). Taxonomic challenges have historically complicated identification, with recent revisionary work resolving numerous synonymies and clarifying species boundaries.
Trissolcus brochymenae
Trissolcus brochymenae is a tiny parasitoid wasp in the family Scelionidae, known primarily as an egg parasitoid of stink bugs (Pentatomidae). The species has been documented parasitizing eggs of the rough stink bug genus Brochymena in North America, and has been studied for its responses to host semiochemicals and plant surface chemistry. Research indicates that its foraging behavior is influenced by synomones adsorbed onto leaf epicuticular waxes, with chemical cues from host feeding and oviposition activity playing critical roles in host location and recognition.
Trissolcus edessae
Trissolcus euschisti
Trissolcus euschisti is a scelionid parasitoid wasp approximately 1.5 mm in length that attacks the eggs of stink bugs (Pentatomidae), particularly species in the genus Euschistus. The species exhibits habitat partitioning with the congeneric parasitoid Telenomus podisi, showing greater abundance on woody host plants while T. podisi dominates herbaceous vegetation. It has been investigated as a potential biological control agent for brown marmorated stink bug (Halyomorpha halys) and demonstrates flexible reproductive strategies, including the ability to develop in hosts where resources have been partially utilized by prior parasitoid activity.