Association of the opposite sexes of Dryinus niger Kieffer, with notes on males of the other Western Palaearctic species of the same genus (Hymenoptera, Dryinidae).

In Fennoscandia, only one species of Dryinus (Hymenoptera, Dryinidae) is known, D. niger Kieffer, 1904. The species is very sporadically collected in that region, and the association of its opposite sex is difficult by its rarity. The capture of a male in Norway allowed us to describe it and place it in the new key to the males of Western Palaearctic Dryinus.

Description of a new species of Ampulicomorpha Ashmead (Hymenoptera, Embolemidae) from Madagascar.

A new species of Ampulicomorpha Ashmead, A. minima sp. nov., is described from Madagascar, Toliara Province. The female holotype is compared with the known females of all other Afrotropical species of the same genus. A new key to them is presented, together with the first complete multifocal illustration of the females of all Afrotropical species of Ampulicomorpha.

DNA Barcoding Unveils New Species of the Sexually Dimorphic Genus Anteon Jurine (Hymenoptera, Dryinidae) from China.

Species of Anteon Jurine, 1807 are a large group of parasitoids attacking leafhoppers, which are important insect pests. Despite their great potential in pest biological control, the taxonomy and biology of these parasitoids are far from clear. Sexual dimorphism is extreme in Anteon species and has hampered the taxonomy of these parasitoids, resulting in many species described based on a single sex. In this paper, we employed an integrated taxonomic approach for delimitating species, combining morphological examinations with DNA barcoding, to investigate Anteon species from China. In total, 53 COI sequences representing 29 species of Anteon were obtained and analyzed. On the basis of both morphology and DNA barcoding, five new species of Anteon were discovered and described: A. clariclypeum sp. nov., A. maguanense sp. nov., A. parafidum sp. nov., A. shaanxianum sp. nov., and A. shandonganum sp. nov. The neotype of A. claricolle Kieffer is designated. The sexual association of six species was confirmed by DNA barcoding, which led to the synonymy of Anteon liui Xu, Olmi & He 2010, new syn., under Anteon meifenganum Olmi, 1991. Keys to species of Anteon from the Oriental and Eastern Palaearctic are updated to contain the five new species. Our study demonstrates that DNA barcoding is a potent tool for tackling the taxonomic challenges in parasitoids with extreme sexual dimorphism.

Description of a new species of Deinodryinus from Ecuador: D. hubeni sp. nov. (Hymenoptera, Dryinidae).

A new species of Deinodryinus Perkins, 1907, D. hubeni sp. nov., is described from Ecuador, Tungurahua Province. The new species can be recognized by having the antennal setae shorter than breadth of antennomeres, the face completely sculptured by subparallel longitudinal keels, the paramere with distal extremity covered with sensorial lamellae and with inner proximal branch covered with lamellae and wrapping penis. The male holotype is compared with the known males of all other Neotropical species of the same genus. The key to the Neotropical males of Deinodryinus is modified to include this new species.

First record of Anteon xericum Olmi & van Harten (Hymenoptera, Dryinidae) from Palaearctic region.

The Malaise trap program was implemented to carry out periodic sampling in southeastern Iran, specifically targeting Kerman province, in order to investigate and study specimens belonging to the family Dryinidae. Among the assemblage of collected specimens, notable identifications were made within the subfamily Anteoninae, including the discernment of Anteon xericum Olmi & van Harten. This significant finding signifies a previously unreported occurrence in the Palaearctic region (Iran). A detailed diagnosis of the species, an identification key to Iranian Anteon species, a modified key to the Anteon females of the Eastern Palaearctic, along with a distribution map are provided.

DNA barcoding of Sclerogibbidae and confirmation of the opposite sexes of Sclerogibba berlandi Benoit (Hymenoptera: Sclerogibbidae).

The female and male of Sclerogibba berlandi Benoit, 1963 (Hymenoptera: Sclerogibbidae), collected in Abu Dhabi (United Arab Emirates) and characterized by a pronounced sexual dimorphism, were associated for the first time by mitochondrial COI sequences. A comparison with COI sequences of S. crassifemorata Riggio De Stefani-Perez, 1888 and S. talpiformis Benoit, 1950 from Abu Dhabi proved the diversity of S. berlandi. The COI sequence of a female of S. rossi Olmi, 2005 from Japan, Okinawa-jima, was analyzed for the first time and compared with the other sequences.

Discovery of a new species of Dryinus (Hymenoptera: Dryinidae) from mid-Cretaceous Burmese amber.

Dryinus carsteni sp. nov. (Hymenoptera: Chrysidoidea: Dryinidae) is described from mid-Cretaceous Kachin (Burmese) amber. The new species is close to D. taron Martynova, Zhang, Olmi, Mller, Perkovsky, 2020, but it can be distinguished for the shorter body (about 2 mm), antennomere 3 about 5 as long as broad and protarsomere 2 produced into hook (in D. taron, the body is longer more than 5 mm, antennomere 3 is about 20 as long as broad and protarsomere 3 is produced into hook).

Discovery of the first apterous pincer wasp from amber, with description of a new tribe, genus and species of Apodryininae (Hymenoptera, Dryinidae).

Rovnodryinus khomychi new genus and new species is described from Upper Eocene Rovno amber (Ukraine). It is the first apterous pincer wasp found in amber. This new taxon is attributed to the subfamily Apodryininae and the new tribe Rovnodryinini. The key to the subfamilies and tribes of Dryinidae is modified to include the new tribe. The new genus, known by a female, is characterized by the mesosoma almost completely composed of fused sclerites, the absence of wings and the presence of ocelli in the anterior half of the face. A close relationship of the new genus with the extant Apodryininae is underlined. R. khomychi is the first apodryinine found in the Northern Hemisphere. The tribe Rovnodryinini is the first higher taxon known only from Rovno amber. Tritophania patruelis Jacobi and the tribe Elicini (Hemiptera, Fulgoromorpha, Tropiduchidae) are reported from Rovno amber for the first time.

Revision of Embolemidae (Hymenoptera: Chrysidoidea) from the Middle East.

The family Embolemidae (Hymenoptera: Chrysidoidea) from the Middle East is taxonomically reviewed. Three species are reported, redescribed, and illustrated, Ampulicomorpha thauma Rasnitsyn Matveev from Iran, Embolemus harteni Olmi from Yemen, and E. huberi Olmi from Iran. The extremely rare genus Ampulicomorpha Ashmead is here recorded for the first time from the Middle East. Embolemus harteni is further recorded from two more governorates of Yemen. A species identification key of Embolemidae from the Middle East, distribution maps, details of the morphological characters, and extensive colour photographs of every species are also provided. A brief discussion on the species relationships and their relevant ecoregions based on the currently limited available information is offered.

A new species of Anteon from Zimbabwe (Hymenoptera, Dryinidae).

A new species from Zimbabwe, Anteon chirindense sp. nov. (Hymenoptera: Dryinidae: Anteoninae), is described and illustrated. Its relationship with other Afrotropical species of Anteon is discussed. The new species is close to A. haladai Olmi, described from Zambia, but its chela is different with inner margin of protarsomere 5 curved, whereas it is almost rectilinear in A. haladai. The key to the Afrotropical species of Anteon is modified to include the new species.

A new species of Lonchodryinus (Hymenoptera, Dryinidae) from Upper Eocene Baltic amber.

Lonchodryinus groehni sp. nov. (Hymenoptera: Chrysidoidea: Dryinidae) is described from Baltic amber. The new species is close to L. balticus Olmi Guglielmino, 2012, but it can be distinguished for the different OPL/POL ratio and 2r-rsRs vein of the fore wing. A key to the fossil species of Lonchodryinus and a comparison with the extant species L. ruficornis (Dalman, 1818) are presented.

Application of DNA barcoding confirms the female, male, larva and host of Bocchus scobiolae Nagy (Hymenoptera: Dryinidae).

Bocchus scobiolae Nagy (Hymenoptera: Dryinidae, Bocchinae) was reared in Szeged, Hungary. The female, male and immature larva were associated by mitochondrial COI sequences. B. scobiolae, previously known only from Romania, is recorded for the first time from Hungary, Moldova, and Turkey. Caliscelis wallengreni (Stål) (Hemiptera: Caliscelidae) is mentioned for the first time as host of B. scobiolae. B. vernieri Olmi is indicated for the first time from Hungary. Helegonatopus rasnitzyni (Trjapitzin, 1963) (Hymenoptera: Encyrtidae), recorded for the first time from Hungary, was reared from B. scobiolae (new record).

Anteon hubeni a new species from Ecuador (Hymenoptera: Dryinidae).

BACKGROUND: Anteon is a speciose genus widespread in all zoogeographical regions, except Antarctica. NEW INFORMATION: A new species, Anteon hubeni sp. n., is described below from Ecuador, Pichincha Province. The new species is similar to Anteon oliveirai Olmi, known from Brazil, Minas Gerais. The main difference between these two species concerns the sculpture of the frons: in A. oliveirai, the frons shows two lateral keels around the orbits directed towards the antennal toruli, whereas in A. hubeni, these keels are not present. The key to the Neotropical species of Anteon is modified to include the new species.

First Bocchus Ashmead (Hymenoptera: Dryinidae) from Upper Eocene Rovno amber: B. schmalhauseni sp. nov.

A new species of pincer wasps, Bocchus schmalhauseni sp. nov. (Dryinidae) is described from Rovno amber (Ukraine). The amber piece was collected in the Vladimirets District in the north-west of the Rovno region. Taking into account this new record, a total of five species of Dryinidae are registered from Rovno amber. A key to the fossil species of Bocchus Ashmead is presented. The possible reasons for the different distribution of Dryinus species on both coasts of Subparathetys are discussed.

Taxonomy of Iranian Gonatopodinae (Hymenoptera, Dryinidae), with description of a new species.

Gonatopodinae (Hymenoptera, Chrysidoidea, Dryinidae) of Iran, were taxonomically reviewed. A recent sampling in South-Eastern Iran has led to the identification of eight species belonging to three different genera, Echthrodelphax Perkins (one species), Gonatopus Ljungh (six species), and Haplogonatopus Perkins (one species). A new species, Gonatopus opsiicida Rakhshani Olmi sp. nov. is described and Illustrated. It was found  in association with leafhoppers on Tamarix stricta Boiss., in Hamoon international wetlands (Sistan, Iran). Two species, E. tauricus Ponomarenko and G. lunatus Klug, are recorded for the first time from Iran A description was also provided for the previously recorded species. The key for identification and distribution maps are also provided for the known species of Gonatopodinae in Iran.

Discovery of a new Nearctic species of Bocchus (Hymenoptera: Dryinidae).

Bocchus pratti sp. nov. (Hymenoptera: Dryinidae: Bocchinae) is described from California, USA. The key to the males of the Nearctic species of the genus Bocchus Ashmead, is modified to include the new species.

Application of DNA barcoding confirms the host of Gonatopus viet Olmi, 1986 (Hymenoptera, Dryinidae).

Gonatopus viet Olmi, 1986 was originally described from Vietnam based on a single female. No further distribution records or hosts have been documented since its original discovery. In the present study, this species is newly recorded from China and its host is confirmed as Stirellus capitatus (Distant, 1918) using DNA barcoding techniques. The utility of DNA barcoding to discover host-Dryinidae associations is discussed.

Discovery of a new species of Embolemus Westwood (Hymenoptera: Embolemidae) from New Caledonia.

Embolemus villemantae sp. nov. (Hymenoptera: Embolemidae) is described from New Caledonia. The key to the males of the Australasian species of Embolemus is modified to include the new species.

Biodiversity of the aculeate wasps (Hymenoptera: Aculeata) of the Arabian Peninsula: Chrysidoidea, Dryinidae.

An updated checklist of the Arabian species of Dryinidae is provided here. The list includes 40 identified species in eight genera and five subfamilies: Anteoninae (2 genera, 11 species), Aphelopinae (1 genus, 4 species), Bocchinae (2 genera, 5 species), Dryininae (1 genus, 5 species) and Gonatopodinae (2 genera, 15 species). Distributions, both on the Peninsula and extra-limital, are provided for each species; nine species (23%) are endemic to the Arabian Peninsula.

Biodiversity of the aculeate wasps (Hymenoptera: Aculeata) of the Arabian Peninsula: Chrysidoidea, Embolemidae.

An updated checklist of the Arabian species of Embolemidae is provided here. The list includes a single species: Embolemus harteni Olmi, 1997. Distributions, both on the Peninsula and extra-limital, are provided; this species is not endemic to the Arabian Peninsula.