Abstract
Thallisellites olgae gen. et sp. n. (Erotylidae: Languriinae, Thallisellini) is described from the Late Eocene Baltic amber. Extant species of the tribe Thallisellini are all of a neotropical distribution. The new genus is similar to the extinct Serramorphus Lyubarsky et Perkovsky, 2017 from Bitterfeld amber. The new genus differs from Serramorphus by the smooth, rounded and not dentate lateral margin of the pronotum (in Serramorphus, the lateral margin is sinuous and spinose). New genus is considered monotypic and differs from extant genera of Thallisellini primarily in the strongly developed anterolateral angles of the pronotum. Family Tarsonemidae (Acari) is reported from the Baltic amber for the first time.
Highlights
The family of Erotylidae includes over 3500 species in 11 tribes and 6 subfamilies (Leschen & Buckley, 2007; Leschen et al, 2010)
A new genus from Baltic amber was discovered. This genus is arranged to the family Erotylidae on base of the following characters: epimeron long, extending towards the third abdominal segment; first abdominal segment comparatively short, about 1.3 times as long as second abdominal segment; elytral punctures arranged into longitudinal rows
The new genus is placed in the subfamily Languriinae and tribe Thallisellini based on the following characters: antennal insertion concealed in dorsal view; antennal club three-segmented; supraocular line not present; anterolateral angles of pronotum well developed; procoxal cavity open externally; tibial terminal spurs not present, tarsal shelf not present
Summary
The family of Erotylidae includes over 3500 species in 11 tribes and 6 subfamilies (Leschen & Buckley, 2007; Leschen et al, 2010). A new genus from Baltic amber was discovered. This genus is arranged to the family Erotylidae on base of the following characters: epimeron long, extending towards the third abdominal segment; first abdominal segment comparatively short, about 1.3 times as long as second abdominal segment; elytral punctures arranged into longitudinal rows. The new genus is placed in the subfamily Languriinae and tribe Thallisellini based on the following characters: antennal insertion concealed in dorsal view; antennal club three-segmented; supraocular line not present; anterolateral angles of pronotum well developed; procoxal cavity open externally; tibial terminal spurs not present, tarsal shelf not present. The tribe Thallisellini comprises extant genera, all Neotropical, Acryptophagus Grouvelle, 1919 (1 species), Platoberus Sharp, 1900 (10 species), Pseudhapalips Champion, 1913 (2 species), Thallisella Crotch, 1876 (13 species), and an extinct genus Serramorphus
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