1a. First 3 pairs of pereiopods with true chelae, the 1st pair the largest and most robust.
Step 2
1b. Third pereiopod never with true chela, in most groups chelae also absent from 1st and 2nd pereiopods.
Step 135
141 possible taxa remaining show common names
- Acanthacaris caeca
- Acanthacaris tenuimana
- Arctides antipodarum
- Arctides guineensis
- Arctides regalis
- Callianassa australiensis
- Callianassa biffari
- Callianassa californiensis
- Callianassa gigas
- Callianassa japonica
- Callianassa kraussi
- Callianassa petalura
- Callianassa turnerana
- Eunephrops bairdii
- Eunephrops cadenasi
- Eunephrops manningi
- Evibacus princeps
- Homarus americanus
- Homarus capensis
- Homarus gammarus
- Ibacus alticrenatus
- Ibacus brevipes
- Ibacus brucei
- Ibacus ciliatus
- Ibacus novemdentatus
- Ibacus peronii
- Justitia japonica
- Justitia longimanus
- Justitia mauritiana
- Linuparus somniosus
- Linuparus sordidus
- Linuparus trigonus
- Metanephrops andamanicus
- Metanephrops arafurensis
- Metanephrops armatus
- Metanephrops australiensis
- Metanephrops binghami
- Metanephrops boschmai
- Metanephrops challengeri
- Metanephrops formosanus
- Metanephrops japonicus
- Metanephrops mozambicus
- Metanephrops neptunus
- Metanephrops rubellus
- Metanephrops sagamiensis
- Metanephrops sibogae
- Metanephrops sinensis
- Metanephrops thomsoni
- Metanephrops velutinus
- Neoglyphea inopinata
- Nephropides caribaeus
- Nephrops norvegicus
- Nephropsis acanthura
- Nephropsis aculeata
- Nephropsis agassizii
- Nephropsis atlantica
- Nephropsis carpenteri
- Nephropsis ensirostris
- Nephropsis malhaensis
- Nephropsis neglecta
- Nephropsis occidentalis
- Nephropsis rosea
- Nephropsis stewarti
- Nephropsis suhmi
- Nephropsis sulcata
- Palibythus magnificus
- Palinurellus gundlachi
- Palinurellus wieneckii
- Palinurus charlestoni
- Palinurus delagoae
- Palinurus elephas
- Palinurus gilchristi
- Palinurus mauritanicus
- Palinustus mossambicus
- Palinustus truncatus
- Palinustus unicornutus
- Palinustus waguensis
- Panulirus argus
- Panulirus cygnus
- Panulirus echinatus
- Panulirus gracilis
- Panulirus guttatus
- Panulirus homarus
- Panulirus inflatus
- Panulirus interruptus
- Panulirus japonicus
- Panulirus laevicauda
- Panulirus longipes
- Panulirus marginatus
- Panulirus ornatus
- Panulirus pascuensis
- Panulirus penicillatus
- Panulirus polyphagus
- Panulirus regius
- Panulirus stimpsoni
- Panulirus versicolor
- Parribacus antarcticus
- Parribacus caledonicus
- Parribacus holthuisi
- Parribacus japonicus
- Parribacus perlatus
- Parribacus scarlatinus
- Projasus bahamondei
- Projasus parkeri
- Puerulus angulatus
- Puerulus carinatus
- Puerulus sewelli
- Puerulus velutinus
- Scyllarides aequinoctialis
- Scyllarides astori
- Scyllarides brasiliensis
- Scyllarides deceptor
- Scyllarides delfosi
- Scyllarides elisabethae
- Scyllarides haanii
- Scyllarides herklotsii
- Scyllarides latus
- Scyllarides nodifer
- Scyllarides roggeveeni
- Scyllarides squammosus
- Scyllarides tridacnophaga
- Scyllarus arctus
- Scyllarus batei
- Scyllarus bertholdii
- Scyllarus brevicornis
- Scyllarus martensii
- Scyllarus pygmaeus
- Scyllarus rugosus
- Thalassina anomala
- Thaumastocheles japonicus
- Thaumastocheles zaleucus
- Thaumastochelopsis wardi
- Thenus orientalis
- Thymopides grobovi
- Thymops birsteini
- Thymopsis nilenta
- Upogebia capensis
- Upogebia major
- Upogebia pugettensis
- Upogebia pusilla
- Upogebia wuhsienweni
Decision path