<p><strong>The Tanytarsini (Diptera: Chironomidae) in the collection of the Museum of Amber Inclusions, University of Gdańsk</strong></p>

Abstract

Non-biting midges of the tribe Tanytarsini collected in the Museum of Amber Inclusions, University of Gdańsk, Poland, are reviewed. Among over 1500 chironomid specimens examined (inclusions in Baltic amber), 44 Tanytarsini individuals were found, of which 27 well preserved specimens were determined to 7 species, including 3 species described as new. Stempellinella electra sp. nov. (male) displays morphological hypopygial characters unique for the genus, and the antenna composed of 13 flagellomeres. A new checklist of fossil and extant species of this genus is also given, including Stempellinella sofiae (Fusari et Lamas, 2014) comb. nov. Tanytarsus glaesarius sp. nov. (male) is the only Eocene species of the genus with a reduced number of antennal flagellomeres. Tanytarsus protogregarius sp. nov. (male) is the oldest known representative of the gregarius species group. Notes on phylogenetic relations of the new species with their extant congeners are also provided.

Towards the diversity of non-biting midges of the tribe Tanytarsini from Eocene Baltic amber (Diptera: Chironomidae)

“…The latest data, based on examinations of a collection of Baltic amber comprising more than 15,000 animal inclusions, indicate that Tanytarsini account for ca. 3% of all the chironomid specimens and less than 0.3% of the zooinclusions (Zakrzewska and Giłka, 2015a).…”

“…As Tanytarsus glaesarius was described recently on the basis of a single specimen, the original description can now be supplemented with the following characters: wing length 1140 μm, AR 0.98 (when flagellum measured as 10-segmented), AR 0.79 (as 11-segmented) (cf. Zakrzewska and Giłka, 2015a). Giłka and Zakrzewska, 2015 x 7 x 2 mm); 1 male (CCHH 242-11, 12 x 7 x 2.5 mm); 2 males as syninclusions 19 x 8.5 x 5.5 mm); 1 male (CCHH 1754-12, triangular 7 x 5 x 4.5 mm, Figure 6.1, 6.2).…”

“…Remarks. This is one of the most frequent Tanytarsini species in Baltic amber collected both from the Gulf of Gdańsk and the Rovno region (Giłka et al, 2013;Zakrzewska and Giłka, 2015a), and the only fossil species of this tribe known from the adult female.…”

“…Figure 6.1 and 6.2 illustrate the atypical structure of the 6 6 0 5 9 5 -----p 2 690 630 370 210 160 90 65 0.59 p 3 645 690 410 245 200 105 75 0.59 hypopygial anal point, observed in one of the five specimens examined (cf. Zakrzewska and Giłka, 2015a).…”

Two new species of fossil Corethrella Coquillett from Late Eocene Rovno amber, with a species‐level phylogeny for the family based on morphological traits (Diptera: Corethrellidae)

“…Based on the ant species composition, Rovno amber has been dated to the Upper Eocene (ca 36 Ma) (Dlussky & Rasnitsyn, ). Recent work on Tanytarsini midges (Chironomidae, Chironominae) suggests a very close deposition time between the ambers of Rovno and those of the Gulf of Gdańsk, as several species are common to both deposits (Giłka et al , ; Zakrzewska & Giłka, , ).…”