Baissa (PIN collection 4210, layer 2) (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.

Environment/lithology: lacustrine - large; lithified, carbonaceous 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 classes: macrofossils, mesofossils

Preservation: mold/impression

Reposited in the PIN

Primary reference: P. Wegierek. 1989. New species of Mesozoic aphids (Snaposhnikoviidae, Homoptera). Paleontological Journal 23(4):40-49 [M. Clapham/M. Clapham]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 125413: authorized by Matthew Clapham, entered by Matthew Clapham on 09.03.2012, edited by Jered Karr and Lindy Edwards

Creative Commons license: CC BY (attribution)

Taxonomic list

Insecta
 Hemiptera - Mimarachnidae
Mimarachne mikhailovi10 Shcherbakov 2007 planthopper
PIn 4210/1086
 Hemiptera - Szelegiewicziidae
Xenoaphis viticulata n. gen. n. sp.
Xenoaphis viticulata n. gen. n. sp. Wegierek 1989 aphid
PIN 4210/2539
 Hemiptera - Palaeoaphididae
Ellinaphidinae indet.4 Kania and Wegierek 2008 aphid
PIN 4210/2520, 2553, 2557, 2558, 2559, 2560, 2566, 2567, 2570, 2573, 2583b, 2587, 2590a, 2590b, 2592, 2595, 2599, 2608, 2614, 4462a, 4462b
Ellinaphis sp.4 Shaposhnikov 1979 aphid
PIN 4210/2613, 2615
Ellinaphis incognita4 Shaposhnikov 1979 aphid
PIN 4210/2556, 2578, 2604, 2607, 4389
Ellinaphis elegans n. sp.4 Kania and Wegierek 2008 aphid
PIN 4210/2602
Ellinaphis sensoriata4 Shaposhnikov 1979 aphid
PIN 4210/2565, 2582, 2591, 2594
Ellinaphis eserta n. sp.4 Kania and Wegierek 2008 aphid
PIN 4210/2561
Ellinaphis cubocrassa n. sp.4 Kania and Wegierek 2008 aphid
PIN 4210/2551, 2562, 2576, 2577, 2593, 2598, 2600, 2606, 2609, 2611, 2612, 2616, 2618, 4363, 7558
Ellinaphis curta n. sp.4 Kania and Wegierek 2008 aphid
PIN 4210/2564, 2568, 2580, 2588, 7559
Ellinaphis truncata4 Kania and Wegierek 2008 aphid
PIN 4210/2555, 2583a, 2619
Ellinaphis longistigma4 Kania and Wegierek 2008 aphid
PIN 4210/2620
Transbaikalis furcata4 Kania and Wegierek 2008 aphid
PIN 4210/2554
Unioaphis venusta4 Kania and Wegierek 2008 aphid
PIN 4210/2579
Annulaphis mostovskini4 Kania and Wegierek 2008 aphid
PIN 4210/2605
Annulaphis rasnitsyni4 Shaposhnikov 1979 aphid
PIN 4210/2597
Caudaphis sp.4 Zhang et al. 1989 aphid
PIN 4210/2581, 2603, 2610a, 2610b, 2617, 4472, 4481, 7561
Caudaphis modica n. sp.4 Kania and Wegierek 2008 aphid
PIN 4210/2563, 2585
Caudaphis brevicrura n. sp.4 Kania and Wegierek 2008 aphid
PIN 4210/2572, 2584
Caudaphis vulgata4 Kania and Wegierek 2008 aphid
PIN 4210/2528, 2569
Caudaphis angustivola4 Kania and Wegierek 2008 aphid
PIN 4210/2552, 2574, 2575, 2589, 2596, 2601, 2621
 Hemiptera - Matsucoccidae
Eomatsucoccus sukachevae n. gen. n. sp.5
Eomatsucoccus sukachevae n. gen. n. sp.5 Koteja 1988 pine bark scales
PIN 4210/1100, 1101
 Blattaria - Holocompsidae
Vitisma rasnitsyni11 Vršanský 1999 cockroach
PIN 4210/1271, 1272, 1301
 Hymenoptera - Sepulcidae
Micramphilius minutus n. gen. n. sp.9
Micramphilius minutus n. gen. n. sp.9 Rasnitsyn 1993 stem sawfly
PIN 4210/1118, 1119
 Coleoptera - Scarabaeidae
Cretoscarabaeus lentiginosus n. sp.8 Nikolajev 1995 scarab beetle
PIN 4210/702
 Diptera - Ironomyiidae
Hermaeomyia bisaetigera n. sp.6 Mostovski 1995 ironic fly
PIN 4210/3080
 Diptera - Platypezidae
Proplatypeza amabilis n. sp.7 Mostovski 1995 flat-footed fly
PIN 4210/3091, 3090
 Diptera - Mycetophilidae
Prospeolepta trapezia1 Blagoderov 1995 fungus gnat
PIN 4210/2866
Ekhiritus disannuus1 Blagoderov 1995 fungus gnat
PIN 4210/2856
Docosia baisae3 Blagoderov 1998 fungus gnat
PIN 4210/2859
Baisepesthoneura mesozoica3 Blagoderov 1998 fungus gnat
PIN 4210/2858
Drepanorzeckia extrunculipennis n. sp.2 Blagoderov 1997 fungus gnat
PIN 4210/2864
Drepanorzeckia setifemoralis n. sp.2 Blagoderov 1997 fungus gnat
PIN 4210/2861
Palaecomoptera shcherbakovi2 Blagoderov 1997 fungus gnat
PIN 4210/2855
Palaecomoptera lukashevichae2 Blagoderov 1997 fungus gnat
PIN 4210/2871
Palaecomoptera longimedia2 Blagoderov 1997 fungus gnat
PIN 4210/2863
Paradzickia hurin2 Blagoderov 1997 fungus gnat
PIN 4210/2870