In the aftermath of Permian-Triassic boundary mass-extinction: new ostracod (Crustacea) genus and species from South Tibet
Author
Forel, Marie-Béatrice
Author
Crasquin, Sylvie
text
Geodiversitas
2011
2011-06-30
33
2
247
263
http://dx.doi.org/10.5252/g2011n2a3
journal article
7715
10.5252/g2011n2a3
52b03d71-cefc-44da-9b75-e7cc270ed280
1638-9395
4597109
790AC12D-10AA-4480-AD5B-BAA1A543C552
Bairdiacypris combeae
Forel
n. sp.
(
Fig. 5
F-H)
Fabalicypris reniformis
. –
Hao 1992: 41
, 42, pl. 1, figs 10, 11.
TYPE MATERIAL
. —
Holotype
: one complete carapace (P6M2624;
Fig. 5F
);
paratype
: one complete carapace (P6M2625;
Fig. 5H
).
ETYMOLOGY. — Dedicated to Simone Combe, personal dedication.
MATERIAL
EXAMINED. — 9 complete carapaces.
DIMENSIONS. — L =
495-770 µm
; H =
245-375 µm
.
Holotype
: L =
529 µm
; H =
245 µm
.
Paratype
: L =
754 µm
; H =
360 µm
.
TYPE
HORIZON
. — Sample 06Ti30, Unit
VI
, Tulong Formation, Anisian, Middle Triassic.
TYPE
LOCALITY
. — Tulong section, Southern
Tibet
.
OCCURRENCE. — Tulong section, Southern
Tibet
. Samples 06Ti21, 06Ti27, 06Ti28, 06Ti30 and 06Ti34, units
V
and
VI
, Spathian-Anisian, Early-Middle Triassic.
DIAGNOSIS. — A species of
Bairdiacypris
with maximum of height located in posterior part of the carapace, AB with small radius of curvature and maximum of curvature located high.
DESCRIPTION
DB short and straight at both valves; ADB long and straight; AB with quite small radius of curvature with maximum convexity located high (just below mid-H); VB long, convex at LV and concave at RV; PB with small radius of curvature with maximum of convexity located low (below lower ⅓ of H); carapace long (H/L = 0.46); maximum of H located in posterior third of L.
REMARKS
Bairdiacypris combeae
Forel
n. sp.
is close to
Bairdiacypris reniformis
(Chen, 1958)
from the Early Permian of South
China
. In
B. combeae
Forel
n. sp.
the radius of curvature of AB and PB are smaller.