Arkell.1956.Jurassic..

TANGANYIKA 329
Ptychophylloceras ptychoicum (Quenst.) (= subptychoicum Dacque)
Sowerbyceras sp.
Taramelliceras cf. flexuosum (Munster)
Mayaites cf. subtumidus (Waagen)
Euaspidoceras depressum (Futterer)
Euaspidoceras cf. riazi (Collot)
Euaspidoceras cf. douvillei (Collot)
Mirosphinctes aff. frickensis (Moesch)
Perisphinctes rotoides Ronchadze
Perisphinctes cf. antecedens Salfeld
Perisphinctes cf. gresslyi de Loriol
Perisphinctes cf. pickeringius (Young & Bird)
Perisphinctes africanus Dacque (or burui Boehm)
The Perisphinctids indicate lowest Plicatilis Zone (Highworth Limestones),
but there are also some elements suggestive of the highest
Cordatum Zone. This also must be earlier than the Tangila fauna of
Kenya (p. 323).
UPPER CALLOVIAN
A quarry in siliceous limestone near Pendambili station, worked during
construction of the railway from Dar-es-Salaam to Morogoro, yielded a
splendid collection to an engineer named Kinkelin. After him was named
Proplanulites kinkelini Dacque, which later became type species of the
genus Kinkeliniceras Buckman (Fraas, 1908 ; Dacque, 1910 ; Hennig,
1924, p. 60 ff.). The ammonites from here comprise Phylloceras aff.
haloricum Hauer (Hennig, 1924, p. 76, pi. iii, fig. 12), Calliphylloceras
disputabile (Zittel), Lytoceras cf. adeloides Kudernatsch, Kinkeliniceras
kinkelini (Dacque), K. pendambilianum (Dacque), Hubertoceras cf. omphalodes
(Waagen), Peltoceratoides ngerengereanum (Dacque). This is an
Upper Callovian assemblage (Athleta-Lamberti Zones). Against it
Hennig's addition (1924, p. 82) of a Cadoceras (which would indicate
Lower Callovian) cannot be trusted. Probably also Upper Callovian
is Euaspidoceras horridum Miiller sp. (1900, p. 528 and pis.), from
Mameka.
Another Upper Callovian fauna was collected by Dr P. E. Kent in 1951
a quarter-mile from Mkulumuzi Bridge, near Tanga, in a soft buff sandy
limestone with ochreous fossils. The ammonites here comprise an
assemblage of Binatisphinctes spp. of the style of B. fluctuosus (Pratt)
and B. welschi and B. robauxi Gerard & Contaut, with Grossouvria and
Subgrossouvria. It is comparable with the fauna of the Miritini Shale
of Mombasa (see p. 323).
LOWER CALLOVIAN
Near the 5-5 km. milestone from Tanga on the Usambara railway a
path formerly led off NNW., and about 2-1 km. along it an ironshot
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