been known since the Visean of Pettycur.

J. Galtier/Jtevietv of Palaeobotany and Palynology 95 (1997) 5I — 72

32S

300 290

355

342

310

DEVON i TOURN. ,'Tn1ITn2:.Tn3

NAMURIAN A:,8:.' C

STEPH.

WESTPH. AIB:C:, D

PE R MIAN

VI SEAN
V1 I V2: V3

MIADESMIA

PSALIXOCHLAENA
ROWLEYA

PHYSOSTOMA

LAGENOSTOMA
BOTHRODENDRON
HIZEMODENDRON
PALAEOSTACHYA
CONOSTOMA

BOWMANITE S

RHABDOXYLON
SUTCLIFFIA

MESOXYLON

DIAPHORODENDRON
CORDAITES

ANACHOROPTERIS
TUBICAULIS

ZYGOPTERIS

SCOLECOPTE RI 3
PACHYTESTA

SPENCERITES

ARTHROXYLON
SIGILLARIA

ARTHROPITYS
ANKYROPTERI S
MEDULLOSA

PSARONIUS

LYGINOPTERIS
MICROSPERMOPTERIS
HETERANGIUM

FLEMINGITES

LEPIDOPHLOIOS
LEPIDOCARPON
ETAPTERIS

MAZOCARPON

STAUROPTERIS
PARALYCOPODITES
LEPIDODENDRON
ACHLAMYDOCARPON
CORYNEPTERIS
BOTRYOPTERIS
CLEPSYDROPSIS
SPHENOPHYLLUM

Fig. 7. Stratigraphic range of some important genera of Euramerican coal-ball floras present in European coal balls.

Interestingly, the Pettycur Limestone has been interpreted as a peat dominated by the lycopod Paralycopodites and Ht.terartgium (Scott and Rex, 1985). Other genera, which became classic compo- nents of younger coal-ball Qoras, are known from st111 older but non-peat-accumulatmg envIron- ments: I.epidophloios (I.epidocarpon) and Ftapteris from the lower — middle Visean of Glenarbuck; Mazocarpon, Paralycopodites, Achlamydocarpon, Borryopteris and Stauropteris from the upper TouI'IlalslaI1 of Berwlckshlre, and SphNlophyllu% from the middle Tournaisian of the Montagne Noire and Saalfeld (Scott et al., 1984).