Research Article |
Corresponding author: Uwe Kaulfuss ( uwe.kaulfuss@uni-goettingen.de ) Academic editor: Pavel Starkevic
© 2024 André Nel, Uwe Kaulfuss.
This is an open access article distributed under the terms of the Creative Commons Attribution License (CC BY 4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
Citation:
Nel A, Kaulfuss U (2024) A crane fly of the genus Gynoplistia Macquart (Diptera, Limoniidae) from the early Miocene of New Zealand. ZooKeys 1192: 103-110. https://doi.org/10.3897/zookeys.1192.115536
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The first fossil limoniid fly from the Miocene Fossil-Lagerstätte of Foulden Maar in New Zealand is described on the basis of an isolated well-preserved wing. The specimen is tentatively attributed to a new species Gynoplistia fouldensensis sp. nov. in the large extant genus Gynoplistia, which is well diversified in the country. It is the second fossil record of this genus, the first one being an isolated wing from the Cretaceous Weald Clay Formation in the United Kingdom.
Australasia, Fossil-Lagerstätte, Foulden Maar, Insecta, Tipuloidea
Limoniid flies are very frequent in the fossil record, with 468 species distributed in 48 genera (
The fossil limoniids from Australasia are very poorly known, with two “limoniid indet.” briefly described and figured by
Limoniids are frequently encountered in the Miocene lacustrine sediments and amber from Europe, China, Russia, Sumatra, Mexico, and Dominican Republic (e.g.,
Here we describe a new limoniid species based on an isolated wing from the early Miocene of New Zealand, we tentatively attribute it to the genus Gynoplistia Macquart, 1835. With 319 extant species, this genus is very speciose and distributed all over the world (
The single specimen described herein was collected at the Foulden Maar Fossil-Lagerstätte (Fig.
The specimen was studied and photographed with a Nikon SMZ1000 stereomicroscope with attached Canon T3 camera. Wetting the specimen with ethanol revealed venational details of the wing and enhanced the contrast between the diatomite matrix and the fossil.
Photographs were stacked and enhanced in Photoshop CS5.1 (Adobe Systems Inc.) and the drawing of the wing was prepared from photographs using CorelDraw. We follow the wing venation terminology of
Wing nomenclature: CuA, cubitus anterior; CuP, cubitus posterior; A, anal vein; d, discal medial cell; M1, M2, M3, M4, branches of median vein; m1, cell between M1 and M2; Rs, posterior branch of radius; R1, R2, R3, R4, R5, apical branches of radius; r-m, crossvein between R5 and M1+2; Sc, subcostal vein.
Order Diptera Linnaeus, 1758
Family Limoniidae Rondani, 1856
Genus Gynoplistia Macquart, 1835
Holotype : New Zealand • sex unknown; an isolated wing; near Middlemarch, Otago; Foulden Maar Fossil-Lagerstätte; 45.5269°S, 170.2191°E; Geology Museum, Department of Geology, University of Otago (OU); OU46615.
Foulden Maar diatomite, near Middlemarch, Otago, New Zealand; earliest Miocene, Aquitanian.
The wing venation of the new species strongly resembles that of the fossil G. (?) mitchelli in the shape of the radial and median veins. Still, G. fouldensensis sp. nov. but can be differentiated by the shape of discal cell and crossvein between M3 and M4 being more distal than basal part of M3.
Wing 8.8 mm long, 3.2 mm wide, with brown tinge, a series of white spots in anterior part and five series of transverse darker spots, veins black; Sc long, ending into C, extending far distal beyond fork of Rs, Sc-r just before tip of Sc; part of R5 basal to r-m elongate and oblique, R5 straight, reaching wing apex, 1.5 as long as Rs, R2+3+4 0.9 mm long; R2 beyond fork of R3 and R4; R3 3.0 mm long, slightly undulate; R4 3.4 mm long, straight; no supernumerary crossveins in cells r3, r4, and r5; r-m and m-cu not aligned, r-m situated a short distance past base of discal medial cell, m-cu situated midway between base and apex of discal medial cell; fork of vein M3+4 in apical section of discal medial cell; discal medial cell 1.4 mm long, 0.7 mm wide, closed; cell m1 present, c. 1.2 mm long; vein CuA straight; anal vein straight.
Named after the type locality Foulden Maar (Otago, New Zealand).
This wing corresponds to that of a Limoniidae because of the following characters (after
The combination of characters “cell m1 present, part of R5 basal to r-m elongate and oblique, and forked R2+3+4” is encountered in some species of the genera Gynoplistia, Pseudolimnophila Alexander, 1919, Hexatoma Latreille, 1809 (sensu lato), and Pilaria Sintenis, 1889. The Australasian species of Epiphragma Osten Sacken, 1860 also have a cell m1 and a forked R2+3+4, but their part of R5 basad r-m is very short, unlike in the new fossil.
Hexatoma (sensu lato) forms a morphology-based phylogenetic clade with Pseudolimnophila, Pilaria, and Ulomorpha (
Pseudolimnophila and Ulomorpha are unknown in the Australasian/Oceanian region. Pilaria is represented by P. brooksi Alexander, 1953 in this region. This species has no cell m1 (
Hexatoma is currently divided into six subgenera (
Following
Unlike the genera previously mentioned, Gynoplistia is very diverse in New Zealand, with 108 species listed by
It is noteworthy that the wing venation of the fossil G. (?) mitchelli strongly resembles that of G. fouldensensis sp. nov., especially in the shape of the radial and median veins, but with an important difference in the shape of the discal cell, that is, the crossvein between M3 and M4 is more distal than basal part of M3 in the new fossil versus the contrary in G. (?) mitchelli (
This study of a new fossil wing illustrates the difficulties encountered when describing a fossil Limoniidae on the sole basis of wing characters. In this case at least two genera could be candidates for an attribution, even if we prefer the genus Gynoplistia rather than Hexatoma mostly because of the pattern of wing coloration. Also the attribution of this Miocene fossil species to to Gynoplistia is unsurprising because this genus is nowadays very diverse in New Zealand, whereas Hexatoma remains unknown from this country.
We thank Dr Daubian Santos and Dr Wieslaw Krzemiński for their useful comments on the first version of the paper. We thank the Gibson family at Foulden Hills for kindly permitting access to the fossil site.
The authors have declared that no competing interests exist.
No ethical statement was reported.
This work was funded by the German Research Foundation (project 429296833).
All authors have contributed equally.
André Nel https://orcid.org/0000-0002-4241-7651
Uwe Kaulfuss https://orcid.org/0009-0007-6858-8612
All of the data that support the findings of this study are available in the main text.