Baissa (PIN collection 4210, layer 4): Aptian, Russian Federation

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Insecta - Thysanoptera - Thripidae
Convexithrips robustus n. gen., n. sp. Shmakov 2009
Shmakov 2009 4 specimens
PIN 4210/2268,2273,2317,5449 (2 measurements)
Insecta - Thysanoptera - Aeolothripidae
Fusithrips n. gen. crassipes Shmakov 2009
Shmakov 2009 4 specimens
PIN 4210/2260,2269,2331,5455
Insecta - Hemiptera - Oviparosiphidae
Oviparosiphum baissensis n. sp. Shaposhnikov and Wegierek 1989
Shaposhnikov and Wegierek 1989 3 specimens
recombined as Archeoviparosiphum baissense
PIN 4210/2623 (some paratypes could from from PIN 3064) (1 measurement)
Insecta - Hemiptera - Szelegiewicziidae
Brimaphis certa n. gen., n. sp. Wegierek 1989
Wegierek 1989 1 specimen
PIN 4210/2628 (1 measurement)
Insecta - Hemiptera - Palaeoaphididae
Ellinaphidinae indet. Kania and Wegierek 2008
Kania and Wegierek 2008 2 specimens
PIN 4210/2654, 2655
Caudaphis sp. Zhang et al. 1989
Kania and Wegierek 2008 1 specimen
PIN 4210/2626
Caudaphis longiantennata Kania and Wegierek 2008
Kania and Wegierek 2008 1 specimen
PIN 4210/2657
Caudaphis brevicrura Kania and Wegierek 2008
Kania and Wegierek 2008 1 specimen
PIN 4210/2649
Caudaphis angustivola Kania and Wegierek 2008
Kania and Wegierek 2008 2 specimens
PIN 4210/2656, 2652
Buriataphis soporata n. sp. Kania and Wegierek 2008
Kania and Wegierek 2008 2 specimens
PIN 4210/2651, 2648 (2 measurements)
Ellinaphis sp. Shaposhnikov 1979
Kania and Wegierek 2008 1 specimen
PIN 4210/2650
Ellinaphis mirabila Kania and Wegierek 2008
Kania and Wegierek 2008 2 specimens
PIN 4210/2658, 2653
Ellinaphis longistigma n. sp. Kania and Wegierek 2008
Kania and Wegierek 2008 1 specimen
PIN 4210/2647 (2 measurements)
Insecta - Hymenoptera - Ichneumonidae
Palaeoichneumon micron n. sp. Kopylov 2009
1 specimen
PIN 4210/1147 (1 measurement)
Palaeoichneumon freja n. gen., n. sp. Kopylov 2009
1 specimen
PIN 4210/1146 (2 measurements)
Insecta - Coleoptera - Hybosoridae
Cretanaides trogopterus n. gen., n. sp. Nikolajev 1996
Nikolajev 1996 1 specimen
PIN 4210/706 (1 measurement)
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:113354
Authorizer:M. Clapham Enterer:M. Clapham, J. Karr
Modifier:M. Clapham Research group:paleoentomology
Created:2011-07-28 14:17:37 Last modified:2014-08-05 22:42:19
Access level:the public Released:2011-07-28 14:17:37
Creative Commons license:CC BY
Reference information

Primary reference:
36791. D. S. Kopylov. 2009. A new subfamily of Ichneumonids from the Lower Cretaceous of Transbaikalia and Mongolia (Insecta: Hymenoptera: Ichneumonidae). Paleontological Journal 43(1):83-93 [M. Clapham/M. Clapham]

Secondary references:

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]
40858 G. V. Nikolajev. 1996. Lamellicorn beetle species (Coleoptera, Scarabaeidae) with multistriate elytra from the Lower Cretaceous Baisa locality, Transbaikalia. Paleontological Journal 30:217-224 [M. Clapham/M. Clapham]
40721 G. K. Shaposhnikov and P. Wegierek. 1989. New late Mesozoic aphids (Oviparosiphidae, Homoptera). Paleontological Journal 23(3):37-47 [M. Clapham/M. Clapham]
36856 A. S. Shmakov. 2009. The oldest members of the families Aeolothripidae and Thripidae (Insecta: Thysanoptera) from the Lower Cretaceous of Transbaikalia. Paleontological Journal 43(4):428-432 [M. Clapham/M. Clapham]
40723 P. Wegierek. 1989. New species of Mesozoic aphids (Snaposhnikoviidae, Homoptera). Paleontological Journal 23(4):40-49 [M. Clapham/M. Clapham]