PLEISTOCENE RODENTS FROM THE URALS AND WEST-SIBERIAN PLAIN: BIOCHRONOLOGICAL

IMPLICATIONS

ALEXANDER BORODIN presenter's e-mail: bor@ipae.uran.ru

Institute of Plant and Animal Ecology RAS

Ekaterinburg, Russia

The goal of our presentation is to give the biochronologic characteristic of rodents and

especially arvicolids in Quaternary faunas of the Urals and West-Siberian Plain.

Three points to be discussed:  - Sequence of structural changes in molars  - Molar size changes in some phyletic lineages - The changes in species composition of small mammal faunas

The analyzed material includes the author’s collections and also some published data (Krukover 1992, Maleeva 1970, 1976, 1984, Maleeva & Stefanovski 1988, Smirnov 1994, 1996, Strukova 1999, 2002, Zazhigin 1980, Zudin et al. 1977, et al.)

Geographical location of the studied areaGeographical location of the studied area

Geographical location of the sites of small mammal

faunas in the Urals and

West-Siberian Plain

Geographical location of the sites of small mammal

faunas in the Urals and

West-Siberian Plain

Geographical location of the sites of small mammal

faunas in the Urals and

West-Siberian Plain

Geographical location of the sites of small mammal

faunas in the Urals and

West-Siberian Plain

Geographical location of the sites of small mammal

faunas in the Urals and

West-Siberian Plain

Structural characteristics of rodents’ teeth

Stages of evolution in molars of West-Siberian arvicolid rodents

MQ zones of Quarternary in Western Europe, Urals and West-Siberian PlainGlaci-ations

East European stratigrraphic

scale (Vangengejm et al., 2001)

Siberian stratigraphical

scale (Arkhipov, 1987, 1989)

Syst

em

Subs

erie

s

Link

10Sartan Ostashkovo Sartan

Monchalovo KarginianHashoort

Kormydzi-hantka 100

Riss-W?rm Mikulinian

Kazantsevo

Tazovian Tazovian Tazovian Kalmankian Shirta

Upper Samarovo

200 Odintsovian

Lower Samarovo 300

Dneprovian

M.arvalis-L.transiens

400A.mosbachensis-M.arvalinus

500

600P. oeconomus - S.gregaloides

Azovy Lower Shaitan

Don AzovianS.gregaloides-P.protoeconomus

Ilyinian MQR6Pokrovskian

750?Mansi Mansi Mansi

Gornofilino

Ja

1200 E.argyropuloi - P.ternopolitanus

A.pliocaenicus

O

ZhevakhovianChumla-

kian I MQR11 A.deucalion-Borsodia

2150?

S.hintoni P.pannonicus

Lagurus transiens- S.hintoni

Upper part of Kochkovka formation

Khazarian Yarsino f.c.

MQR3 A.mosbachensis L.transiens

MQR5

MQR7

MQR4

Mat

uyam

a /R

/B

runh

es \N

\M

agne

tost

ratig

raph

y

Uppe

rPl

eist

ocen

e

1800

Qua

tern

ary

Mid

dle

Mid

dle

Q 2 Bachta Riss

Uppe

r Northern

and central parts of

West Siberia

Trans-Urals

Age, Ka

ScaleGeneral Till Sequence in West Siberia (Arkhipov,

1989)

MQR1 A.terrestris Ermakovian

MQR2 L.lagurus A.mosbachensis Samarovo

Plei

stoc

ene

Q Uppe

r Q 3 Zyrjanka W?rm

Kalininian

Mindel-Riss Likhvinian

Moskovian

Mammu-thus

faunal complex

Mammu-thus

faunal complex Upper part

yyyyyyyyyyyyyyyy

yy Lower part

Mammuthus faunal

complex

Low

er Q 1

Nizjami Upper Shaitan

Shaitan Mindel

OkianNizjamian

SingilianChembakchino f.c. Tobolian

Petropavlian

Muchkapian Tiltimian

Talagaika

Tiras-polian Viatkian

Koshelevo f.c.

Baturino f.c.

Mammalian faunal complexes (f.c.)

ZonesGlobal Russian

Siberian, Alpine Horizons

Serie

s

HorizonsEastern Europe

South of West Siberia (The

uniform stratigraphic

scheme, 2000)

Low

erEo

plei

stoc

ene-

EP

Lower part of Kochkovka formation

Tamanian

Uppe

rLo

wer

Nogaiskian

Kizikhian

MQR9

Razdolian

MQR8

Scoro-dumian

Sarykulian

Morosovian

Khapro-vian

Podpusk-Lebiazhian

Pse-kupian

Neog

ene

Plio

cene

Uppe

rAk

chag

ylia

n

860?

A.pliocaenicus P.ternopolitanus

Chumla-kian II

MQR10 P.ternopolitanus A.deucalion

Subzones

P.protoeconomus P.pannonicus

S.hintoni - Lagurodon arankae

S. gregalis - M.intermedius

S. gregaloides

P.pannonicus A.pliocaenicus

Glaci-ations

East European stratigrraphic

scale (Vangengejm et al., 2001)

Siberian stratigraphical

scale (Arkhipov, 1987, 1989)

Syst

em

Subs

erie

s

Link

10Sartan Ostashkovo Sartan

Monchalovo KarginianHashoort

Kormydzi-hantka 100

Riss-W?rm Mikulinian

Kazantsevo

Tazovian Tazovian Tazovian Kalmankian Shirta

Upper Samarovo

200 Odintsovian

Lower Samarovo 300

Dneprovian

M.arvalis-L.transiens

400A.mosbachensis-M.arvalinus

500

600P. oeconomus - S.gregaloides

Azovy Lower Shaitan

Don AzovianS.gregaloides-P.protoeconomus

Ilyinian MQR6Pokrovskian

750?Mansi Mansi Mansi

Gornofilino

Ja

1200 E.argyropuloi - P.ternopolitanus

A.pliocaenicus

O

ZhevakhovianChumla-

kian I MQR11A.deucalion-Borsodia

2150?

S.hintoni P.pannonicus

Lagurus transiens- S.hintoni

Upper part of Kochkovka formation

Khazarian Yarsino f.c.

MQR3 A.mosbachensis L.transiens

MQR5

MQR7

MQR4

Mat

uyam

a /R

/B

runh

es \N

\M

agne

tost

ratig

raph

y

Uppe

rPl

eist

ocen

e

1800

Qua

tern

ary

Mid

dle

Mid

dle

Q 2 Bachta Riss

Uppe

r Northern

and central parts of

West Siberia

Trans-Urals

Age, Ka

ScaleGeneral Till Sequence in West Siberia (Arkhipov,

1989)

MQR1 A.terrestris Ermakovian

MQR2 L.lagurus A.mosbachensis Samarovo

Plei

stoc

ene

Q Uppe

r Q 3 Zyrjanka W?rm

Kalininian

Mindel-Riss Likhvinian

Moskovian

Mammu-thus

faunal complex

Mammu-thus

faunal complex Upper part

yyyyyyyyyyyyyyyy

yy Lower part

Mammuthus faunal

complex

Low

er Q 1

Nizjami Upper Shaitan

Shaitan Mindel

OkianNizjamian

SingilianChembakchino f.c. Tobolian

Petropavlian

Muchkapian Tiltimian

Talagaika

Tiras-polian Viatkian

Koshelevo f.c.

Baturino f.c.

Mammalian faunal complexes (f.c.)

ZonesGlobal Russian

Siberian, Alpine Horizons

Serie

s

HorizonsEastern Europe

South of West Siberia (The

uniform stratigraphic

scheme, 2000)

Low

erEo

plei

stoc

ene-

EP

Lower part of Kochkovka formation

Tamanian

Uppe

rLo

wer

Nogaiskian

Kizikhian

MQR9

Razdolian

MQR8

Scoro-dumian

Sarykulian

Morosovian

Khapro-vian

Podpusk-Lebiazhian

Pse-kupian

Neog

ene

Plio

cene

Uppe

rAk

chag

ylia

n

860?

A.pliocaenicus P.ternopolitanus

Chumla-kian II

MQR10 P.ternopolitanus A.deucalion

Subzones

P.protoeconomus P.pannonicus

S.hintoni - Lagurodon arankae

S. gregalis - M.intermedius

S. gregaloides

P.pannonicus A.pliocaenicus

Size of vole teeth

Length of М/1 of recent M. (Stenocranius) gregalis from West-Siberian Plain

Length of М/1 of M. (Stenocranius) gregalis from the Neopleistocene and Holocene localities of the Trans-Urals

Length of М/1 of M. (Stenocranius) gregalis and L. lagurus from Neopleistocene and Holocene localities of the Trans-Urals

Rs=0.973P=0.0002

Paleoclimatic conditions in West-Siberian Plain (according to Arkhipov, 1994) and the position of studied faunas

Length of М/1 of M. (Stenocranius) gregalis and L. lagurus from Neopleistocene and Holocene localities of the Trans-Urals compared to

the climatic changes

Species content

Landscape characteristic of Pleistocene faunas of West-Siberian Plain

Correlation of vole species ratio in local faunas of the Late Neopleistocene from Trans-Urals with the longitude

and altitude of the site

Conclusions• 1. The common patterns of arvicolid

teeth evolution allow to reveal the reliable chronostratigraphic markers for the correlation of MQ zones of different regions within at least the central part and north of Eurasia. MQ subzones to a greater extent reflect the regional character of geological and biological events in Quaternary.

• 2. The changes of teeth size could be considered as biochronological markers in only cases when they are not a direct result of the environmental influence. Teeth size of Neopleistocene M. gregalis and L. lagurus can not be adopted as biochronologic markers for the Urals and West-Siberian Plain because they were directly influenced by the climatic changes.

• 3. The identification of the correct chronological stages of the changes in species content of small mammal faunas is only possible when we take into account the gradient of climatic conditions both in latitudinal, longitudinal and altitudinal directions. 

Thank you for attention