Diagnoza

Porównanie

The lineage is probably a successor of Sudeticersa. Specimens probably come from the Frech's collection. No label has been preserved but nautiloids from the same collection preserved in identical way have labels indicating Carolina mine in Upper Silesia (see Dzik 1984: pl. 34: 6,8, pl. 38: 2) so these are presumably topotypes from the Gaebler marine horizon lb. Morphotypes usually separated into distinct species A. paucilobum  (Phillips, 1836) are within the range of population variability but this does not apply to specimens from the horizon 1d Roemer classified as such by Bojkowski (1972, pl. 8:8). These show a pattern in the growth lines rather suggestive of dimorphoceratid affinities.Juvenile specimens from the Gaebler Horizon in the Czech part of the Upper Silesian basin have been identified as A. tenuispirale Demanet, 1941 by Vasicek (1983), because of the presence of a spiral striation but, as shown by Saunders (1973), this is the feature of juveniles of A. discus. 

Autekologia

Występowanie geograficzne

Carolina mine, Upper Silesia, Poland; also other localities in the Upper Silesia, Lublin Coal Basin.

Zasięg czasowy

Namurian

Materiały muzealne

UWR 1867s and UWR 1866 (Uniwersytet Wrocławski)

Literatura

Dzik, J. 1985. Phylogeny of the Nautiloidea. Palaeontologia Polonica 45,1-219.

DzIk, J. 1997. Emergence and succession of Carboniferous conodont and ammonoid communities in the Polish part of the Variscan sea. Acta Palaeontologica Polonica 42, 57-170.

Schmidt 1925

Schwarzbach 1937

Miller & Furnish 1958

Czarniecki 1959

Rehor & Rehorova 1972

Bojkowski 1972, 1979

Żelichowski 1972

Korejwo 1974

Musiał & Tabor 1988