Baissa (PIN collection 1668) (Cretaceous of Russian Federation)

Where: Buryatia, Russian Federation (53.3° N, 112.1° E: paleocoordinates 56.0° N, 108.5° E)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Zaza Formation, Aptian (125.0 - 113.0 Ma)

• 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.

• group of beds-level stratigraphic resolution

Environment/lithology: lacustrine - large; lithified siltstone and lithified marl

• "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

Size class: macrofossils

Preservation: mold/impression

Primary reference: A. G. Sharov. 1968. Filogeniya ortopteroidnykh nasekomykh. Trudy Paleontologicheskogo Instituta Akademii Nauk SSSR 118:1-216 [C. Beard/C. Beard/J. Karr]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 113403: authorized by Matthew Clapham, entered by Jered Karr on 30.07.2011, edited by Lindy Edwards and Matthew Clapham

Creative Commons license: CC BY (attribution)

Taxonomic list

Insecta
 Hemiptera - Bajsaphididae
Bajsaphis pulchra n. sp.2 Homan et al. 2015 aphid
PIN 1668/1689(2307)
 Hemiptera - Hylicellidae
Vietocycla peregrina14 Shcherbakov 1988 true bug
PIN 1668/1670
 Hemiptera - Naucoridae
Angaronecta longirostris n. gen. n. sp.9
Angaronecta longirostris n. gen. n. sp.9 Popov 1971 creeping water bug
PIN 1668/1742
 Dicondylia - Baissomantidae
Baissomantis picta17 Gratshev and Zherikhin 1993 winged insect
PIN 1668/1645
 Orthoptera - Tetrigidae
Archaeotetrix locustopseiformis n. gen. n. sp. Sharov 1968 pygmy grasshopper
PIN 1668/1667
Prototetrix reductus n. gen. n. sp. Sharov 1968 pygmy grasshopper
PIN 1668/1665
 Orthoptera - Vitimiidae
Vitimia evoluta n. gen. n. sp.
Vitimia evoluta n. gen. n. sp. Sharov 1968 grasshopper
PIN 1668/1654
 Orthoptera - Elcanidae
"Baisselcana sibirica n. gen. n. sp." = Panorpidium sibirica
"Baisselcana sibirica n. gen. n. sp." = Panorpidium sibirica Sharov 1968 grasshopper
PIN 1668/1651
 Hymenoptera -
Oryctopterus dubius n. gen. n. sp.12
Oryctopterus dubius n. gen. n. sp.12 Rasnitsyn 1975 wasp
PIN 1668/2344
 Hymenoptera - Angarosphecidae
Baissodes robustus n. gen. n. sp.12
Baissodes robustus n. gen. n. sp.12 Rasnitsyn 1975 apoid wasp
PIN 1668/2239
 Hymenoptera - Ichneumonomimidae
Ichneumonomima paradoxa n. gen. n. sp.12
Ichneumonomima paradoxa n. gen. n. sp.12 Rasnitsyn 1975 wasp
PIN 1668/2342
 Hymenoptera - Xyelidae
Chaetoxyela hirsuta n. gen. n. sp.10, Baissoxyela tarsalis n. gen. n. sp.11
Chaetoxyela hirsuta n. gen. n. sp.10 Rasnitsyn 1966 sawfly
PIN 1668/2340
Baissoxyela tarsalis n. gen. n. sp.11 Rasnitsyn 1969 sawfly
PIN 1668/1819
 Coleoptera - Brentidae
Cretonanophyes longirostris n. gen. n. sp.1 Zherikhin 1977 weevil
PIN 1668/1772
 Coleoptera - Pleocomidae
Proteroscarabaeus yeni1 Grabau 1923 rain beetle
PIN 1668/1797
 Coleoptera -
Holcorobeus vittatus1 Nikritin 1977 scarab beetle
PIN 1668/1809
 Coleoptera - Trogidae
Avitortor leptoscelis5 Nikritin 1977 hide beetle
PIN 1668/1801 (paratype of Geotrupoides sulcatus Nikritin)
 Coleoptera - Lithoscarabaeidae
"Proteroscarabaeus baissensis n. sp." = Lithoscarabaeus baissensis1
"Proteroscarabaeus baissensis n. sp." = Lithoscarabaeus baissensis1 Nikritin 1977 scarab beetle
PIN 1668/1761, 1830
 Coleoptera - Carabidae
"Geotrupoides sulcatus n. sp." = Antemnacrassa sulcata1, Antemnacrassa nebulosa n. sp.6, "Geotrupoides vitimensis n. sp." = Antemnacrassa vitimensis1, Conjunctia prodroma n. gen. n. sp.1
"Geotrupoides sulcatus n. sp." = Antemnacrassa sulcata1 Nikritin 1977 ground beetle
PIN 1688/1785 (not 1801 = Avitortor leptoscelis)
Antemnacrassa nebulosa n. sp.6 Nikolajev 2004 ground beetle
PIN 1668/1809
"Geotrupoides vitimensis n. sp." = Antemnacrassa vitimensis1 Nikritin 1977 ground beetle
PIN 1668/1805
Conjunctia prodroma n. gen. n. sp.1 Ponomarenko 1977 ground beetle
PIN 1668/1763
 Coleoptera - Gyrinidae
Baissogyrus savilovi n. gen. n. sp.7
Baissogyrus savilovi n. gen. n. sp.7 Ponomarenko 1973 whirligig beetle
PIN 1668/1787
 Mecoptera - Aneuretopsychidae
Aneuretopsyche vitimensis n. sp.13 Rasnitsyn and Kozlov 1990 scorpionfly
PIN 1668/1958
 Diptera - Trichoceridae
Karatina explorans n. sp.3 Krzemińska et al. 2009 winter crane fly
PIN 1668/2176
Trichocera sp.3 Meigen 1803 winter crane fly
PIN 1668/2193
 Raphidioptera - Baissopteridae
Baissoptera sp.4 Martynova 1961 snakefly
PIN 1668/1850
 Neuroptera - Nymphidae
Mesonymphes apicalis n. sp.8 Ponomarenko 1992 split-footed lacewing
PIN 1668/1848
 Ephemeroptera - Hexagenitidae
Ephemeropsis trisetalis16 Eichwald 1864 mayfly
PIN 1668/1, 152
Ephemeropsis martynovae n. sp.15 Tshernova 1961 mayfly
PIN 1668/862