Myanmaro primus gen. et sp. nov., the first orthoclad (Diptera: Chironomidae) from Cretaceous Burmese amber

Wojciech Giłka , Eugenyi A. Makarchenko , Mary K. Pankowski , Marta Zakrzewska

Abstract

A fossil genus Myanmaro gen. nov., with a species M. primus sp. nov. (Diptera, Chironomidae) is described from mid-Cretaceous Burmese amber (~100 Ma). The adult male of the new species shows the wing venation pattern lacking a cross-vein MCu, the fore leg ratio lower than 1, and the gonostylus folded inwards - features typical of the subfamily  Orthocladiinae. A bifid gonostylus, with an articulate, likely movable inner branch, is the character indicating a close relationship between Myanmaro and Diplocladius Kieffer, 1908, the latter genus previously postulated as an early lineage in Orthocladiinae. Several characters, i.e. the structure of tergite IX and the anal point, are defined as generic autapom orphies for Myanmaro. A combination of the shape of hypopygial volsellae (or their absence) and the lack of tibial combs also separate this genus from related extant Orthocladiinae and from the only known Cretaceous extinct orthoclad genus Lebanorthocladius Veltz, Azar et Nel, 2007. 
Author Wojciech Giłka (FB / DIZP)
Wojciech Giłka,,
- Department of Invertebrate Zoology and Parasitology
, Eugenyi A. Makarchenko
Eugenyi A. Makarchenko,,
-
, Mary K. Pankowski
Mary K. Pankowski,,
-
, Marta Zakrzewska (FB / DIZP)
Marta Zakrzewska,,
- Department of Invertebrate Zoology and Parasitology
Journal seriesZootaxa, ISSN 1175-5326, (A 20 pkt)
Issue year2019
Vol4565
No1
Pages61-70
Keywords in EnglishDiptera, Chironomidae, Orthocladiinae, systematics, Mesozoic, Burmite, Myanmar
ASJC Classification1103 Animal Science and Zoology; 1105 Ecology, Evolution, Behavior and Systematics
DOIDOI:10.11646/zootaxa.4565.1.4
Languageen angielski
Score (nominal)20
ScoreMinisterial score = 20.0, 24-07-2019, ArticleFromJournal
Publication indicators Scopus SNIP (Source Normalised Impact per Paper): 2016 = 0.948; WoS Impact Factor: 2017 = 0.931 (2) - 2017=0.982 (5)
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