Architaeniglossa
Viviparus
- shell shapes gyrocscopic to speroidal
- worldwide in freshwater
- Jura - today (species since Carboniferous)
- drainage lakes, rivers
- shell primarily organic, mineralisation in the uterus
- Apple Snail
- today: South America, Asia, Africa
- Cretaceous - today
- shell sinistral, slightly asymmetric
- forms clutch
- subtropical - tropical
- can withstand droughts
- terrestrial
Cerithium
- perhaps oldest Caenogastropoda
- Aperture not holostome
- Trias - today
- warm lakes, also marine
- photic zone, Mangroves
- herbivor, detritus
- soft grounds
- may cement itself to surface
- marine - brackish
- worldwide in tropics
- Miocene - today
- Parthenogenesis
- high resistance
- rhipidogloss
- today: mainly in New Zealand
- typical for Paratethys
- eggs in estuary conditions, adults in freshwater
Littorina
- marine
- tidal zone and rocky shores
- herbivor
- since Triassic/Palaeocene?
- vivipar
- thick shell, gyroscopic shape
- Apex blunt
- Aperture askew
- important for Holocene Baltic Sea stratigraphy
- small, long-cone-shaped
- mainly freshwater but also marine-brackish
- gigantism
- Jurassic - today
- decoiled forms
- herbivor
- wide suture
- low to high-trochispiral shell
- Aperture with channe or newel
- Ordovician??? Triassic - today
- Bahamas
- Jurassic - today
- giant forms
- epibenthic
- shelf, sublittoral to littoral and soft substrates
- subtropic - tropical
- "fighting conch"
- deep sea
- soft substrates, cannot move in sediment
- long siphonal tube
- carnivor?
- shell mainly reduced
- foot changed to fins
- carnivor
- trunk-like head
- lower Jurassic - today
- endoplanctonic
- facies independent
- planispiral and keel
- Jurassic/Palaeocene??? - today
- mm - cm size
- Protoconch always varied
- Teleconch planispiral
- in all oceans
- named after ptenogloss Radula
- purple - blueish color
- Cenozoic
- foam raft
- carnivor (jellyfish)
- tropics
- benthic
- carnivor
- Triassic - today
- cone-shaped, coiled
- near-by algae or sea anemones
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