Baissa (PIN collection 4210, layer 15): Aptian, Russian Federation

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Insecta - Diptera - Ironomyiidae
Hermaeomyia bellula Mostovski 1995
1 specimen
PIN 4210/3085
Hermaeomyia unisaetigera n. sp. Mostovski 1995
2 specimens
PIN 4210/3082, 3084 (2 measurements)
Insecta - Diptera - Platypezidae
Maritulus sospes Mostovski 1995
Mostovski 1995 1 specimen
PIN 4210/3094
Insecta - Diptera - Mycetophilidae
Prospeolepta trapezia Blagoderov 1995
Blagoderov 1995 2 specimens
PIN 4210/2881, 2878 (2 measurements)
Baisodicrana secunda n. sp. Blagoderov 1995
Blagoderov 1995 1 specimen
PIN 4210/2880 (1 measurement)
Pollicitator baisae Blagoderov 1995
Blagoderov 1995 2 specimens
PIN 4210/2883, 2879
Insecta - Hemiptera - Palaeoaphididae
Ellinaphidinae indet. Kania and Wegierek 2008
Kania and Wegierek 2008 2 specimens
PIN 4210/2671, 2672
Rallotopaphis antennata Kania and Wegierek 2008
Kania and Wegierek 2008 1 specimen
PIN 4210/2673
Caudaphis vulgata Kania and Wegierek 2008
Kania and Wegierek 2008 1 specimen
PIN 4210/2670
Ellinaphis mirabila n. sp. Kania and Wegierek 2008
Kania and Wegierek 2008 1 specimen
PIN 4210/6879 (1 measurement)
Ellinaphis cubocrassa Kania and Wegierek 2008
Kania and Wegierek 2008 1 specimen
PIN 4210/2675
Ellinaphis sensoriata Shaposhnikov 1979
Kania and Wegierek 2008 1 specimen
PIN 4210/2674
Ellinaphis longistigma Kania and Wegierek 2008
Kania and Wegierek 2008 2 specimens
PIN 4210/2676, 2684
Insecta - Hemiptera - Hylicellidae
Conjucella selene Shcherbakov 2012
Shcherbakov 2012 1 specimen
PIN 4210/1013
Insecta - Hymenoptera - Praeaulacidae
Westratia striata n. sp. Rasnitsyn 1990
Rasnitsyn 1990 1 specimen
PIN 4210/1136 (2 measurements)
Insecta - Hymenoptera - Braconidae
Cretobraconus brachyurus n. sp. Rasnitsyn and Sharkey 1988
Rasnitsyn and Sharkey 1988 1 specimen
PIN 4210/1148 (2 measurements)
Insecta - Coleoptera - Hybosoridae
Leptosorus zherikhini n. gen., n. sp. Nikolajev 2006
Nikolajev 2006 1 specimen
PIN 4210/5461 (2 measurements)
Insecta - Coleoptera - Scarabaeidae
Baisarabaeus rugosus n. gen., n. sp. Nikolajev 2005
Nikolajev 2005 1 specimen
PIN 4210/707
see common names

Geography
Country:Russian Federation State/province:Buryatia
Coordinates: 53.3° North, 112.1° East (view map)
Paleocoordinates:56.0° North, 108.5° East
Basis of coordinate:based on nearby landmark
Geographic resolution:outcrop
Time
Period: Cretaceous Epoch: Early Cretaceous
Stage: Aptian 10 m.y. bin: Cretaceous 3
Key time interval: Aptian
Age range of interval: 121.4 - 113 m.y. ago
Stratigraphy
Formation:Zaza
Stratigraphy comments: C. longipoda, E. trisetalis and Lycoptera all occur in the Zaza Formation indicating that this formation could be correlated with the upper Yixian Formation and the lower Jiufotang Formation in western Liaoning, which have a duration of 122.5-120 Ma. So it is possible to assign the Zaza Formation to an Aptian age. Also correlated with Barremian-Aptian based on plants and pollen.
Lithology and environment
Primary lithology: lithified siltstone
Secondary lithology: lithified marl
Environment:lacustrine - large Tectonic setting:rift
Geology comments: "The water body is reconstructed as an intermontane lake with the depth of 20 - 30 meters (LYAMINA 1980) situated within a granite massif. The presence of thick layers of the bituminous shales shows that the lake was meromictic, with the oxygen deficiency and high hydrogen sulphur level in the hypolimnion. However, the oxygenated epilimnion should be thick, with a lower boundary well beneath the limit of episodic wave action because no suffocation events are documented. The abundance of caddisflies, dobsonfly larvae and other groups intolerant to oxygen deficiency shows that in more shallow areas the water was clear and well-oxygenated even near the bottom. The lake ecosystem was highly productive as indicated by its complex trophic structure (Fig. 2) with several levels of predators up to the large sturgeon-like fish Stychopterus as well as by the extremely high abundance of planetonivorous phantom midges (SINICHENKOVA & ZHERIKHIN 1996)." ZHERIKHIN et al., 1999
Taphonomy
Modes of preservation:mold/impression
Size of fossils:macrofossils,mesofossils
Collection methods and comments
Collection methods:survey of museum collection
Reason for describing collection:taxonomic analysis
Museum repositories:PIN
Metadata
Database number:125791
Authorizer:M. Clapham Enterer:M. Clapham, J. Karr
Modifier:M. Clapham Research group:paleoentomology
Created:2012-03-24 02:26:20 Last modified:2014-08-05 22:51:50
Access level:the public Released:2012-03-24 02:26:20
Creative Commons license:CC BY
Reference information

Primary reference:
40861. M. B. Mostovski. 1995. New taxa of Ironomyiidae (Diptera, Phoromorpha) from the Cretaceous of Siberia and Mongolia. Paleontological Journal 30:318-331 [M. Clapham/M. Clapham/M. Clapham]

Secondary references:

42205 V. A. Blagoderov. 1995. Fungus gnats of the tribe Sciophilini (Diptera, Mycetophilidae) from the Early Cretaceous of Transbaikalia. Paleontological Journal 29(1):72-83 [M. Clapham/J. Karr]
48084 I. Kania and P. Wegierek. 2008. Palaeoaphididae (Hemiptera, Sternorrhyncha) from Lower Cretaceous Baissa deposits: Morphology and classification. Monografie faunistyczne 25:1-135 [M. Clapham/J. Karr]
46865 M. B. Mostovski. 1995. New Mesozoic Platypezidae (Diptera) and the main directions of evolution of the family. Paleontological Journal 29(2):130-146 [M. Clapham/J. Karr]
54524 G. V. Nikolajev. 2005. Novyy rod plastinchatousykh zhukov (Coleoptera, Scarabaeidae) iz nizhnemelovogo mestonakhozhdeniya Baisa v Zabaykal'e. Biologicheskie Nauki Kazakhstana 1:117-120 [M. Clapham/M. Clapham]
54499 G. V. Nikolajev. 2006. A new genus in Hybosorinae (Coleoptera, Scarabaeidae) from the Lower Cretaceous of Transbaikalia. Euroasian Entomological Journal 5:12-13 [M. Clapham/M. Clapham]
54420 G. V. Nikolajev. 2007. Mezozoyskiy Etap Evolyutsii Plastinchatousykh (Insecta: Coleoptera: Scarabaeoidea) 1-222 [M. Clapham/M. Clapham]
50526 A. P. Rasnitsyn. 1990. New representatives of the hymenopterous family Praeaulacidae from Early Cretaceous Buryatia and Mongolia. Vestnik Zoologii 1990(6):27-31 [M. Clapham/M. Clapham]
44480 A. P. Rasnitsyn and M. Sharkey. 1988. New Eoichneumonidae from Early Cretaceous of Siberia and Mongolia (Hymenoptera: Ichneumonoidea). In V. K. Gupta (ed.), Advances in Parasitic Hymenoptera Research 169-197 [M. Clapham/M. Clapham]
52089 D. E. Shcherbakov. 2012. A new subfamily of Mesozoic Hylicellidae (Homoptera: Cicadomorpha). Russian Entomological Journal 21:441-444 [M. Clapham/M. Clapham]