Two new dragonflies (Odonata: Anisoptera) from the Miocene of Carinthia (Austria)
Author
Schädel, Mario
Author
Lechner, Thomas S.
text
Zootaxa
2017
4243
1
153
164
journal article
36283
10.11646/zootaxa.4243.1.7
1facafb7-179b-4200-ac2f-9d00375a7ce4
1175-5326
398752
96C38B34-BD4C-438B-BC73-FAD6CCBDE212
Fossil
Gomphaeschnidae
The systematics within the Aeshnida sensu
Bechly 1996
is still under debate (
Dijkstra
et al.
2013
) with two approaches being at issue. Von
Ellenrieder (2002)
used the taxon
Aeshnidae Leach, 1815
, for all extant species that could be found within the taxon Aeshnida
Bechly, 1996
, sensu
Bechly (2001
,
2003
) that comprises multiple taxa on a family level. Von Ellenrieder's interpretation of the
Aeshnidae
is generally used, because it defines a group that is clearly a clade. Bechly’s approach, however, bears the opportunity for a practical way of recognizing the divisions within the clade. This is very useful, especially in the field of paleoentomology. Hence we follow the nomenclature proposed by
Bechly (2003)
.
A phylogenetic analysis based on morphological characters of larvae and adults of extant species showed strong evidence for a sister-group relationship between the genera
Gomphaeschna
,
Sarasaeschna
,
Oligoaeschna
and
Linaeschna
and the remaining species (=Aeshnodea
Bechly, 1996
) (von
Ellenrieder 2002
).
The family
Gomphaeschnidae Tillyard & Fraser, 1940
(sensu
Bechly 1996
and
Bechly
et al.
2001
), is at least of Lower Cretaceous age (
Bechly
et al.
2001
) and comprises the subfamilies
Gomphaeschnaoidinae
Bechly
et al.
2001
and
Gomphaeschninae
Tillyard & Fraser, 1940 (sensu
Bechly
et al.
2001
) as well as some taxa that were not assigned to a subfamily.
List of all known fossil
Gomphaeschnidae
(sensu
Bechly 1996
,
Bechly
et al.
2001
)
Not assigned:
Cretalloaeschna cliffordae
Jarzembowski & Nel, 1996
, from the
Lower Cretaceous
of
England
(
Bechly
et al.
2001
);
Anglogomphaeschna eocenica
Nel & Fleck, 2014
, from the Late Eocene of the Isle of Wight;
Sophoaeschna frigida
Zhang
et al.
, 2008
, from Late Jurassic to Early Cretaceous of Inner Mongolia, China;
Falsisophoaeschna generalis
Zhang
et al.
, 2008
, from Late Jurassic to Early Cretaceous of
Inner Mongolia
,
China
;
Gomphaeschnaoidinae
:
Anomalaeschna berndschusteri
Bechly
et al.
, 2001
, from the
Lower Cretaceous
of
Brazil
;
Cretagomphaeschnaoides jarzembowskae
Zheng
et al.
, 2016, from the Cretaceous of Myanmar;
Sinojagoria imperfecta
Bechly
et al.
, 2001
, from the
Lower Cretaceous
of
China
(
Liaoning
);
Sinojagoria cancellosa
Li
et al.
, 2012
, from the
Upper Jurassic
or
Lower Cretaceous
of
China
(
Liaoning
);
Sinojagoria magna
Li
et al.
, 2012
, from the
Upper Jurassic
or
Lower Cretaceous
of
China
(
Liaoning
);
Paramorbaeschna araripensis
Bechly
et al.
, 2001
, from the
Lower Cretaceous
of
Brazil
;
Progomphaeschnaoides ursulae
Bechly
et al.
, 2001
, from the
Lower Cretaceous
of
Brazil
;
Progomphaeschnaoides staniczeki
Bechly
et al.
, 2001
, from the
Lower Cretaceous
of
Brazil
;
Plesigomphaeschnaoides mongolensis
Bechly
et al.
, 2001
, from the
Lower Cretaceous
of
Mongolia
;
Plesigomphaeschnaoides pindelskii
Bechly
et al.
, 2001
, from the
Lower Cretaceous
of
England
;
Gomphaeschnaoides obliquus
(
Gomphaeschna obliqua
)
Wighton, 1987
, from the
Lower Cretaceous
of
Brazil
(
Bechly
et al.
2001
);
Gomphaeschnaoides magnus
Bechly
et al.
, 2001
, from the
Lower Cretaceous
of
Brazil
;
Gomphaeschnaoides petersi
Bechly
et al.
, 2001
, from the
Lower Cretaceous
of
Brazil
;
Gomphaeschnaoides betoreti
Bechly
et al.
, 2001
, from the
Lower Cretaceous
of
Brazil
;
Gomphaeschninae
:
?
Oligoaeschna anglica
Cockerell & Andrews, 1916
,
Upper Eocene
,
Isle of Wight
(
Nel & Fleck 2014
;
Nel
et al.
2005
);
Oligoaeschna needhami
Cockerell, 1907
, from the
Lower Oligocene
of
Colorado
(
Nel
et al.
1994b
);
Oligoaeschna oligocenica
Nel & Papazian, 1983
, from the
Lower Oligocene
of
France
(
Nel
et al.
1994b
);
Sarasaeschna
(
Oligoaeschna
)
pryeri
Martin, 1909
, from the
Upper Pliocene
of
Japan
(
Esaki & Asahina 1957
;
Nel
et al.
1994b
);
Oligoaeschna conjuncta
Martynov, 1929
, from the Upper Oligocene of Kasakhstan (
Nel
et al.
1994b
);
?
Gomphaeschna inferna
Pritykina, 1977
, from the
Lower Cretaceous
of
Russia
(
Buryatia
);
?
Gomphaeschna sibirica
Bechly
et al.
, 2001
, from the
Lower Cretaceous
of
Russia
(Siberia);
Gomphaeschna miocenica
Prokop & Nel, 2002
, from the
Lower Miocene
of the
Czech Republic
;
?
Gomphaeschna danica
Madsen and Nel, 1997
, from the Paleocene/Eocene of Denmark;
Gomphaeschna paleocenica
Madsen and Nel, 1997
, from the Paleocene/Eocene of Denmark;
Gomphaeschna schrankii
Lewis, 1988
, from the Paleocene of North Dakota.
Geological Setting.
The active clay pit Schaßbach (
46°47'53.32"N
,
14°48'23.77"E
) is located in eastern
Carinthia
about
3.8 km
northwest of the historical town center of
St. Andrä
(District Wolfsberg).
The
site lies within an intramontane basin that was formed during late
Early
(Karpatian) and early
Middle Miocene
(Badenian) pull-apart phases (
Reischenbacher & Sachsenhöfer 2013
).
The Koralpe
restricts the basin on its eastern side, whereas the
Saualpe
is the western boundary of the basin.
The fine laminated mudstones (‘fish-shale’) that alternate with siltstones are referred to the lacustrine lower part of the Lower Badenian Mühldorf Formation (
Reischenbacher
et al.
2007
;
Reischenbacher & Sachsenhöfer 2013
). The overlying marine sediments were dated to an age of 14.91 Ma (
Reischenbacher
et al.
2007
).
Harzhauser
et al.
(2015)
suggested the name ‘Lake Lavant’ for the fossil lake.
Various plant fossils are known from the Schaßbach clay pit including
Ginkgo adiantoides
(
Meller
et al.
2015
)
. Most of the plant remains come from siltstones without a continuous lamination. Plant fossils from fine laminated mudstones are way less common but show a more optimal kind of preservation. Vertebrate fossils so far include the very abundant cyprinid and gobiid fishes as well as rare skeletal bird remains. Also small down feathers are not uncommon in the biolaminites. Only one freshwater snail species (
Harzhauser
et al.
2015
) and one terrestrial pulmonate species (Harzhauser pers. communication) are known up to the present.