|Basic info||Taxonomic history||Classification||Relationships|
|Morphology||Ecology and taphonomy||External Literature Search||Age range and collections|
Trilobita - Aulacopleurida - Alokistocaridae
Is something missing? Join the Paleobiology Database and enter the data
If no rank is listed, the taxon is considered an unranked clade in modern classifications. Ranks may be repeated or presented in the wrong order because authors working on different parts of the classification may disagree about how to rank taxa.
|R. Wolfart 1994 (Scottia)||Cranidium trapezoidal (sometimes subtriangular) in outline, lenght (sag.) 2/3 of basal width; glabella long (without occipital ring), not quite twice as long as basal glabellar width and narrow lateral glabellar furrows obscured or faintly developed, preglabellar field short, slightly convex, frontal border furrow and border distinct, slightly arched (transv.)
Posterior facial suture diverges rapidly behind palpebral lobes, forming very wide postero-latral limbs of fixigenae; anterior part of facial suture subparallel to convergent, short. Position of palpebral lobes in anterior half of cranidium, unusally far from glabellar midlenght. Eye-ridges obscure to faintly developed. Lenght of palpebral lobes up to 1/20 cephalic lenght. Librigenae with short, stout genal spine. General curvate moderate( to rather strong). Test finely granulose.