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First find of Parabelemnopsis, the alien belemnite from the Southern Hemisphere, in the Upper Berriasian of Central Crimea

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First find of Parabelemnopsis, the alien belemnite from
the Southern Hemisphere, in the Upper Berriasian of
Central Crimea
Ippolitov A.P.*, Desai B.**, Arkadiev V.V.***
*Geological Institute of Russian Academy of Sciences; Moscow, Russia
**Pandit Deendayal Petroleum University, School of Petroleum Technology; Gandhinagar, India
***Saint-Petersburg State University; Saint-Petersburg, Russia
Ammonite biostratigraphy of the Berriasian of Mountain Crimea and
corresponding ammonite, bivalve and brachiopod assembalges
(after Arkadiev et al., 2012)
Despite macrofauna seems to be well-studied both systematically and stratigraphically,
belemnites of the Berriasian are still out of the research focus,
despite potentially they could provide a parallel biosttratigraphic scale and to improve the correlations
Typical belemnites of the Berriasian of Mountain Crimea
(after Weiss, 1991)
(after Kabanov, 1960)
(after Weiss, 1991)
Typical Berriasian belemnites of
Crimea are represented by the
genera Duvalia, diversified
Conobelus, large-sized
Pseudobelus (all fam.
DUVALIIDAE) and, more rarely,
small-sized Hibolithes (fam.
BELEMNOPSEIDAE).
All known Hibolithes species
posess short alveolar grooove
and hastate shapes
The locality
The outcrops are located neaby PetrovoBarabanovo village, south of Zuya settlement, in
the Fundukly ravine.
The sequence is represented by intercalation of
siltstones and silty limestones, containing a lot of
shell debris
The find: position in the section, age and principal
morphological characters
The rostrum is characterized by the following combination of characters:
- subconical to subcylindrical shape
- large elongation (PA/DV=689)
- long alveolar groove
- medium size (DV=8,94mm)
- compressed cross-section anteriorly, round near the apex
Diversity of Early Cretaceous (ValanginianHauterivian) Antarctic belemnites
Belemnopsis
(Parabelemnopsis) cf.
madagascariensis
(Besairie, 1930)
(after Howlett, 1989)
Variety of topotypical (s.lat.) Parabelemnopsis
madagascariensis and its difference with Crimean find
(after Combemorel, 1988)
Other species, originally included into Parabelemnopsis
Holotype of P. patagoniensis
(Favre, 1908)
(after Besairie,
1936)
P. patagoniensis (Favre,
1908)
P. casterasi
(after Combemorel, 1988)
Originally described as
madagaskariensis by
Riccardi, 1977
More Parabelemnopsis: Tibetian records around the J/K boundary
P. elongata
(Yin, 1975)
P. regularis
(Yin, 1975)
P. muricatus
(Chen, 1982)
(after Combemorel, 1988)
More Parabelemnopsis: records from the Oxfordian
Undescribed species from the
Oxfordian of India (previously
mentioned under the name B.
kuntkotensis) Original from the
Spath’s collection
“Hibolithes longiscissus”
(after Challinor, 1989)
Distribution of Parabelemnopsis spp. during the Late Jurassic and
Early Cretaceous and possible migration routes to Crimea
Pb – Oxfordian
Pb – Kimmeridgian
and Tithonian
Pb – Lower
Cretaceous (Be-Hau)
Pb
Pb
Pb
Pb
Pb
Pb
Pb
(after Doyle ad Howlett, 1989)
South American cephalopods in the Berriasian of Crimea
Parabelemnopsis cf. patagoniensis (Favre, 1908)
Substeueroceras sarysuensis Arkadiev
Substeueroceras ex.gr. koeneni
(Steuer)
Substeueroceras
beneckei (Steuer)
Conclusions
The belemnite invasion from Gondwana recorded from the
Upper Berriasian of Crimea is the first record of such type all
around Europe
The appearance of Parabelemnopsis cf. patagoniensis is
roughly coeval with finds of ammonites of American origin
(Substeueroceras) in the same geographic district, indicating
that time cephalopod migrations from South America to
European region were relatively common.
Potentially, further attention to the Berriasian belemnites
provides opportunities for establishing interregional “datum
planes”.
Thank you for your attention !

Our thanks to:
Bogdan Zaytsev (Simferopol), Alberto Riccardi (La Plata
Museum), María Beatriz Aguirre Urreta, Dario Lazo and
Leticia Luci (all University of Buenos-Aires)
The investigation and presentation were supported by
RFBR grants No. 15-05-08767_a, 15-05-06183_a, 15-5545095-ИНД_a and DST project No. INT/RUS/RFBR/P-206.
Автор
Nastya
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