Abstract

The fly genus Atlatlia Bickel, 1986 (Diptera: Dolichopodidae: Medeterinae) is revised with additional new recent and fossil species, and now comprises two major species groups. The Atlatlia grisea group includes three recent species from Australia, A. grisea Bickel, 1986; A. flaviseta Bickel, 1986; and A. isolata sp. nov., three recent species from New Caledonia, A. acra sp. nov., A. argenticoxa sp. nov., and A. cowanae sp. nov., and three species from Baltic amber, A. corynoura, sp. nov., A. electrica sp. nov., and A. licina, sp. nov. The Atlatlia ulrichi group includes six species from Baltic amber, A. angulicauda sp. nov., A. cryptica sp. nov., A. penicillata sp. nov., A. ramosa sp. nov., A. tonsa, sp. nov., and A. ulrichi sp. nov. The genus Kashubia gen. nov., is described from Baltic amber with three species: K. falcata, sp. nov., K. ornatipes sp. nov., and K. starki sp. nov. The genus Eridanomyia gen. nov. is described from Baltic amber with two species, E. amica sp. nov. and E. conjugalis sp. nov. Four of the newly described Baltic amber species also occur in Bitterfeld amber, suggesting their overall faunal similarity. The striking disjunction of the genus Atlatlia in both time and space, recent Australia and New Caledonia and Paleogene Baltic amber, suggests a once much wider distribution, possibly during Eocene “greenhouse earth” climatic conditions, with subsequent extinction leaving only a relict fauna in Australasia. With geological evidence suggesting New Caledonia was largely submerged in the early Paleogene and only emergent in the late Eocene, the New Caledonian Atlatlia fauna possibly originated by dispersal from Australia in the early to mid-Cenozoic.

 
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Bibliographic Data

Short Form
Bickel and Martin. 2025. Rec. Aust. Mus. 77(2): 89–120.
Author
Daniel J. Bickel; John Martin
Year
2025
Title
The pseudo-Gondwanan genus Atlatlia (Diptera: Dolichopodidae) from Australia, New Caledonia, and Baltic amber, with the description of two new genera.
Serial Title
Records of the Australian Museum
Volume
77
Issue
2
Start Page
89
End Page
120
DOI
10.3853/j.2201-4349.77.2025.1907
Language
en
Date Published
07 May 2025
Cover Date
07 May 2025
ISSN (online)
2201-4349
ISSN (print)
0067-1975
CODEN
RAUMAJ
Publisher
Australian Museum
Place Published
Sydney, Australia
Subjects
INSECTA DIPTERA BIOGEOGRAPHY TAXONOMY
Digitized
07 May 2025
Available Online
07 May 2025
Reference Number
1907
EndNote
1907
Title Page
1907_Page1
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1907_Complete
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