Arkell.1956.Jurassic..

PLATE 45
LOWER VOLGIAN
1. Virgatites virgatus (von Buch), holotype after von Buch (1830, pi. viii, fig. 1).
Black shales at Karashovo (Koroshovo) on the River Moskva, 2 leagues above
Moscow. Type species of the genus Virgatites Pavlow, 1892, designated
by R. Douville, 1910. (Objective synonym Euvirgatites Lewinski, 1923.)
X2/3.
2. Virgatites stschukinensis (Michalski) (lectotype Michalski's pi. vi, fig. 8, now
designated), figured to show the virgatotome style of ribbing photographically,
and also the suture. Moscow district. (Geol. Survey Mus., London.)
X i-o.
3. Zaraiskites scythicus (Vischniakoff), lectotype now designated, after Vischniakoff
(1882, pi. iii, fig. 1), Mniovniki, near Moscow. Genus Zaraiskites
Semenow, 1898 (objective synonym Provirgatites Lewinski, 1923). Xo-56.
4. Dorsoplanites dorsoplanus (Vischniakoff ). Ventral view of imperfect lectotype
now designated, after Vischniakoff (188^, pi. 1, fig. 5), X2/3, and side view
of a more complete specimen after Michalski (1890, pi. xi, fig. 2). Xo-58.
The lectotype from Tatarovo. Type species of the genus Dorsoplanites
Semenow, 1898, designated by Roman, 1938 (objective synonym Polytosphinctes
Schindewolf, 1925).
788
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