Pt  search
USEplatinum
Pteranodon  search
BTChordata
 .Vertebrata
 ..Tetrapoda
 ...Reptilia
 ....Diapsida
 .....Archosauria
 ......Pterosauria
 .......Pteranodon
SNGenus.
Pteridophyllen  search
BTPlantae
 .Pteridophyta
 ..Pteridophyllen
Pteridophyta  search
BTPlantae
 .Pteridophyta
NTFilicopsida
 Lycopsida
 Noeggerathiales
 Psilopsida
 Pteridophyllen
 Sphenopsida
RTPteropsida
 sporangia
 Callipteris
 spores
 Juglans
 vascular taxa
 Neuropteris
SNBefore 1981, Callipteris was included as a narrower term.
Pteridospermae  search
BTPlantae
 .Spermatophyta
 ..Gymnospermae
 ...Pteridospermae
NTCallipteris
 Neuropteris
RTSphenopteris
 Ptilophyllum
 Taeniopteris
 Dicroidium
 Pecopteris
Pteriina  search
BTInvertebrata
 .Mollusca
 ..Bivalvia
 ...Pteriina
NTAnthraconaia
 Anthraconauta
 Inocerami
 Pectinacea
Pterobranchia  search
NTCephalodiscida
 Rhabdopleurida
RTHemichordata
 Invertebrata
SNIndexed with Hemichordata or Invertebrata as applicable.
Pterocarya  search
BTPlantae
 .Spermatophyta
 ..Angiospermae
 ...Dicotyledoneae
 ....Pterocarya
SNGenus.
Pteropoda  search
BTInvertebrata
 .Mollusca
 ..Gastropoda
 ...Pteropoda
Pteropsida  search
BTPlantae
 .Pteropsida
RTthallophytes
 Angiospermae
 Gymnospermae
 Pteridophyta
 vascular taxa
SNUsed as a general term.
Pterosauria  search
BTChordata
 .Vertebrata
 ..Tetrapoda
 ...Reptilia
 ....Diapsida
 .....Archosauria
 ......Pterosauria
NTPteranodon
SNOrder.
Pterygota  search
BTInvertebrata
 .Arthropoda
 ..Mandibulata
 ...Insecta
 ....Pterygota
NTNeoptera
 Palaeoptera
SNSubclass.
ptilolite  search
USEmordenite
Ptilophyllum  search
BTPlantae
 .Spermatophyta
 ..Gymnospermae
 ...Cycadales
 ....Ptilophyllum
RTBennettitales
 Pteridospermae
PTt paths  search
USEP-T-t paths
Ptychopariida  search
BTInvertebrata
 .Arthropoda
 ..Trilobitomorpha
 ...Trilobita
 ....Ptychopariida
NTAsaphidae
 Cryptolithus
 Dechenellidae
 Olenidae
 Proetidae
 Scutelluidae
ptygma  search
USEptygmatic folds
ptygmatic folds  search
BTfolds
 .ptygmatic folds
UFptygma
RTmigmatites
SNBefore 1978, also search folds AND ptygmatic.