74a. The five longitudinal dorsal ribs are well developed.
Step 76. 75
74b. The five longitudinal dorsal ribs are only faintly developed.
Step 81. 80
6 possible taxa remaining show scientific names show common names
192 taxa excluded
show scientific names
show common names
- Abranchaea chinensis
- Atlanta affinis
- Atlanta californiensis
- Atlanta echinogyra
- Atlanta fragilis
- Atlanta frontieri
- Atlanta fusca
- Atlanta gaudichaudi
- Atlanta gibbosa
- Atlanta helicinoides helicinoides
- Atlanta inclinata
- Atlanta inflata
- Atlanta lesueuri
- Atlanta meteori
- Atlanta oligogyra
- Atlanta pacifica
- Atlanta peresi
- Atlanta peroni
- Atlanta plana
- Atlanta rosea
- Atlanta tokiokai
- Atlanta turriculata turriculata
- Beaked larva
- Cardiapoda placenta
- Cardiapoda richardi
- Carinaria cithara cithara
- Carinaria cristata cristata
- Carinaria galea
- Carinaria lamarcki challengeri
- Cavolinia gibbosa flava
- Cavolinia globulosa
- Cavolinia inflexa imitans
- Cavolinia tridentata affinis
- Cavolinia uncinata pulsatapusilla pulsatapusilla
- Cavolinia uncinata uncinata roperi
- Cephalobrachia bonnevii
- Cephalobrachia macrochaeta
- Cephalopyge trematoides
- Clio andreae
- Clio campylura
- Clio chaptali
- Clio convexa
- Clio cuspidata
- Clio orthotheca
- Clio piatkowskii
- Clio pyramidata antarctica
- Clio recurva
- Clio scheelei
- Clione limacina antarctica
- Cliopsis krohni grandis
- Corolla calceola
- Corolla intermedia
- Corolla ovata
- Corolla spectabilis
- Creseis acicula acicula
- Creseis bulgia
- Creseis chierchiae
- Creseis virgula conica
- Cuvierina columnella atlantica
- Cymbulia parvidentata
- Cymbulia peroni minor
- Cymbulia sibogae
- Desmopterus gardineri
- Desmopterus pacificus
- Desmopterus papilio
- Diacavolinia angulosa
- Diacavolinia aspina
- Diacavolinia atlantica
- Diacavolinia bandaensis
- Diacavolinia bicornis
- Diacavolinia constricta
- Diacavolinia deblainvillei
- Diacavolinia deshayesi
- Diacavolinia elegans
- Diacavolinia flexipes
- Diacavolinia grayi
- Diacavolinia limbata africana
- Diacavolinia longirostris
- Diacavolinia mcgowani
- Diacavolinia ovalis
- Diacavolinia pacifica
- Diacavolinia robusta
- Diacavolinia souleyeti
- Diacavolinia strangulata
- Diacavolinia striata
- Diacavolinia triangulata
- Diacavolinia vanutrechti meisenheimeri
- Diacria maculata
- Diacria major
- Diacria piccola
- Diacria rampali
- Diacria trispinosa atlantica
- Fiona pinnata
- Firoloida desmaresti
- Fowlerina punctata
- Fowlerina zetesios
- Glaucillus marginata
- Glaucus atlanticus
- Gleba chrysostricta
- Gleba cordata
- Hyalocylis striata
- Hydromyles globulosa
- Janthina exigua
- Janthina janthina
- Janthina pallida
- Janthina prolongata
- Janthina umbilicata
- Laginiopsis trilobata
- Limacina bulimoides
- Limacina cochlostyloides
- Limacina helicina antarctica antarctica
- Limacina helicina helicina acuta
- Limacina helicoides
- Limacina inflata
- Limacina lesueuri
- Limacina retroversa australis
- Limacina trochiformis
- Massya longicirrata
- Notobranchaea bleekerae
- Notobranchaea grandis
- Notobranchaea hjorti
- Notobranchaea inopinata
- Notobranchaea longicollis
- Notobranchaea macdonaldi macdonaldi
- Notobranchaea tetrabranchiata
- Notobranchaea valdiviae
- Oxygyrus keraudreni
- Paedoclione doliiformis
- Paraclione flavescens
- Paraclione longicaudata
- Paraclione pelseneeri
- Peraclis apicifulva
- Peraclis bispinosa
- Peraclis depressa
- Peraclis michaelsarsi
- Peraclis moluccensis
- Peraclis philiporum
- Peraclis reticulata
- Peraclis rissoides
- Peraclis triacantha
- Peraclis valdiviae
- Phylliroe atlantica
- Phylliroe bucephala
- Planktomya henseni
- Platybrachium antarcticum
- Pneumoderma atlanticum atlanticum atlanticum
- Pneumoderma atlanticum boasi
- Pneumoderma atlanticum pacificum
- Pneumoderma atlanticum souleyeti
- Pneumoderma degraaffi
- Pneumoderma heronensis
- Pneumoderma mediterraneum
- Pneumoderma meisenheimeri
- Pneumoderma peroni heterocotylum
- Pneumodermopsis brachialis
- Pneumodermopsis canephora
- Pneumodermopsis ciliata
- Pneumodermopsis macrochira
- Pneumodermopsis macrocotyla
- Pneumodermopsis michaelsarsi
- Pneumodermopsis minuta
- Pneumodermopsis oligocotyla
- Pneumodermopsis paucidens paucidens
- Pneumodermopsis polycotyla
- Pneumodermopsis pupula
- Pneumodermopsis simplex
- Pneumodermopsis spoeli
- Pneumodermopsis teschi
- Protatlanta souleyeti
- Pruvotella danae
- Pruvotella pellucida
- Pterosoma planum
- Pterotrachea coronata
- Pterotrachea hippocampus
- Pterotrachea minuta
- Pterotrachea scutata
- Recluzia
- Recluzia hargravesi
- Recluzia insignis
- Recluzia jehennei
- Recluzia montrouzieri
- Recluzia rollandiana
- Schizobrachium polycotylum
- Spongiobranchaea australis
- Spongiobranchaea intermedia
- Styliola subula
- Thalassopterus zancleus
- Thliptodon akatukai
- Thliptodon antarcticus
- Thliptodon diaphanus
- Thliptodon gegenbauri
- Thliptodon schmidti
Decision path