The discovery of a fossil whitefly from Lower Lusatia (Germany) presents a challenge to current ideas about Baltic amber.

The whiteflies (Hemiptera: Aleyrodidae) are small sternorrhynchan insects, which have the potential to cause significant economic damage to agricultural crops. There is a paucity of knowledge regarding the diversity, disparity, and evolutionary history of these insects, with classification based on the immatures, called puparia. The fossil record of whiteflies is sparse and incomplete, with the majority of fossils representing imaginal forms preserved as inclusions in fossilized resins.

A new species of Eocene whiteflySnotra herczeki sp. nov. (Hemiptera, Sternorrhyncha, Aleyrodidae) from Baltic amber.

The second species of the Aleyrodinae whitefly genus Snotra Szwedo et Drohojowska, 2016 is described based on an inclusion in the Eocene Baltic amber. It is second species of the genus, adding new data to knowledge on disparity and taxonomic diversity of whiteflies in the Eocene Baltic amber. The diversity of the group and its fossil record in the Eocene fossil resins is briefly discussed.

Evolutionary implications of new Postopsyllidiidae from mid-Cretaceous amber from Myanmar and sternorrhynchan nymphal conservatism.

Nymphs of extinct sternorrhynchan hemipterans are extremely rare, although very important for understanding of evolutionary traits of these insects. A protopsyllidioid nymph, in mid-Cretaceous amber from Kachin, Myanmar, placed in the family Postopsyllidiidae, is the first nymph of this family to be found in the fossil. Postopsyllidiidae previously comprised the sole genus Postopsyllidium with a few species: P.

A second Aleurodicinae from the Eocene Baltic amberMedocellodes blackmani gen. et sp. nov. (Hemiptera, Sternorrhyncha, Aleyrodidae).

A new genus and species of Aleurodicinae whiteflies from the Eocene Baltic amber is described. Medocellodes blackmani Drohojowska et Szwedo gen. et sp.

Nomenclatorial note on Bernaeinae (Hemiptera, Sternorrhyncha, Aleyrodidae).

The Bernaeinae, currently regarded as a subfamily of Aleyrodidae (Szwedo Drohojowska 2016, Drohojowska et al. 2019), is the only extinct subfamily of whiteflies with a fossil record from the Callovian (late Middle Jurassic) to Cenomanian (early Upper Cretaceous). Currently, it comprises seven species in six genera (Schlee 1970, Shcherbakov 2000, Drohojowska et al.

New fossil from mid-Cretaceous Burmese amber confirms monophyly of Liadopsyllidae (Hemiptera: Psylloidea).

Amecephala pusilla gen. et sp. nov.

Fossils reshape the Sternorrhyncha evolutionary tree (Insecta, Hemiptera).

The Sternorrhyncha, which comprise about 18,700 described recent species, is a suborder of the Hemiptera, one of big five most diverse insect orders. In the modern fauna, these tiny phytophages comprise insects of great ecological and economic importance, like aphids (Aphidomorpha), scale insects (Coccidomorpha), whiteflies (Aleyrodomorpha) and psyllids (Psylloidea). Their evolutionary history can be traced back to the Late Carboniferous, but the early stages of their evolution and diversification is poorly understood, with two known extinct groups-Pincombeomorpha and Naibiomorpha variously placed in classifications and relationships hypotheses.

Development of ovary structures in the last larval and adult stages of psyllids (Insecta, Hemiptera, Sternorrhyncha: Psylloidea).

The development and organization of the ovaries of ten species from four Psylloidea families (Psyllidae, Triozidae, Aphalaridae and Liviidae) have been investigated. The ovaries of the last larval stage (i.e.

A swarm of whiteflies--the first record of gregarious behavior from Eocene Baltic amber.

A new whitefly Snotra christelae gen. et sp. n.

Thorax morphology of selected species of the genus Cacopsylla (Hemiptera, Psylloidea).

The paper concerns with characteristics of a thorax morphological structure Cacopsylla Ossiannilsson, 1970 species, referring to an analysis of five species classified in the past in three subgenera. The structure of the sternites, tergites and pleurites of all the parts of the thorax was studied by a scanning microscope. Descriptions of particular elements building up thorax plates, their shape, size and links as well as a course of all the clefts and sulcus are provided.

The first Aleyrodidae from the Lowermost Eocene Oise amber (Hemiptera: Sternorrhyncha).

The first records are provided of the family Aleyrodidae in the Lowermost Eocene amber of Oise, France. The following new taxa in the subfamily Aleurodicinae are described, figured and discussed, together with an identification key: Oisedicus maginus gen. et sp.

Revision of the neotropical jumping plant-louse genus Mastigimas (Hemiptera, Psylloidea) attacking Cedrela and Toona species (Meliaceae).

The small Neotropical genus Mastigimas with five described species is revised. Three new species are added: Mastigimas colombianus sp. n.