Early Middle Ordovician graptolite biostratigraphy of the Lovisefred and Albjära drill cores (Scania, southern Sweden)

Early Middle Ordovician graptolites from the Albjära and Lovisefred drill cores (Scania, southern Sweden) can be differentiated into the Isograptus victoriae, Isograptus sp. nov. 2 and Maeandrograptus schmalenseei, Arienigraptus dumosus type/Pseudisograptus manubriatus biozones of Castlemainian and Yapeenian age and the Arienigraptus zhejiangensis and Undulograptus sinicus biozones of early Darriwilian age, replacing the old, long-ranging Didymograptus hirundo Biozone. Faunas from the drill cores include a number of species not previously recognized in Scandinavia.