Paleozoic in situ spores and pollen. Lycopsida

Revision and significance of the Westphalian (Middle Pennsylvanian) arborescent lycopsid Bergeria dilatata (Lindley & Hutton) Álvarez-Vázquez & Wagner

“…In situ megaspores have been identified as Lagenoisporites rugosus type and in situ microspores as of Microspinosporites orbiculus type. These identifi cations are entirely consistent with in situ megaspores and microspores reported in strobili of Flemingites (Bek, 2013(Bek, , 2017. The morphological characteristics of the strobili conform to Flemingites russelianus (Binney) Brack-Hanes & Thomas, as presented below.…”

“…Not all flemingitacean cones yield both in situ micro-and megaspores. It is not unusual to find flemingitacean specimens (preserved as fragments) that yield only microor megaspores, but if the in situ spores are identifi ed to these characteristic types, this is strong confi rmation of the generic classifi cation of the strobilus (see Bek, 2017 (Bek, 2017). These microspores were originally interpreted as cingulate (Potonié & Kremp, 1955;Smith & Butterworth, 1967), but Bek (2013) re-defi ned these spores as monopseudosaccate, excluding them from Lycospora, and proposed a new genus, Microspinosporites.…”

“…These microspores were originally interpreted as cingulate (Potonié & Kremp, 1955;Smith & Butterworth, 1967), but Bek (2013) re-defi ned these spores as monopseudosaccate, excluding them from Lycospora, and proposed a new genus, Microspinosporites. Flemingitacean cone species with megaspores of the Lagenoisporites type (see Bek, 2017) are signifi cantly more numerous than those that produced Lagenicula.…”

“…This group of flemingitacean cones includes not only true Flemingites but also two uppermost Devonian Sublepidodendron species (Bek, 2017 1949 Lepidostrobus sp., Arnold,pl. VII, fi gs 1, 3, 4 (acc.…”

“…Remarks. There are at least 17 Paleozoic fl emingitacean strobilus form-species that are recorded to have produced miospores of the Microspinosporites type (Bek, 2017) and 16 species that yielded megaspores of the Lagenoisporites rugosus type. All these in situ micro-and megaspores are closely similar and diff er only slightly in diameter.…”