 Body impressions of Early Carboniferous temnospondyls from Pennsylvania suggest that some terrestrial temnospondyls mated on land like some modern amphibians . They reproduced through internal fertilization rather than mating in water . The presence of three individuals in one block of sandstone shows that the temnospondyls were gregarious . The head of one individual rests under the tail of another in what may be a courtship display . Internal fertilization and similar courtship behavior are seen in modern salamanders . 
 Body impressions of Early Carboniferous temnospondyls from Pennsylvania suggest that some terrestrial temnospondyls mated on land like some modern amphibians . They reproduced through internal fertilization rather than mating in water . The presence of three individuals in one block of sandstone <a href='uninflect' title='1'><mark>shows</mark></a> that the temnospondyls <a href='uninflect' title='2'><mark>were</mark></a> gregarious . The head of one individual rests under the tail of another in what may be a courtship display . Internal fertilization and similar courtship behavior are seen in modern salamanders . 
Body impressions of Early Carboniferous temnospondyls from Pennsylvania suggest dat some terrestrial temnospondyls mated on land like sum modern amphibians . They reproduced thru internal fertilization rather den mating in water . The presence of three individuals in one block of sandstone show tdatthe temnospondyls was gregarious . da head of one individual rests under the tail of anotha in wht may be a courtship display . Internal fertilization and similar courtship behavior are seen in modern salamanders .