Spirolaxis

Spirolaxis is a genus of sea snails, marine gastropod mollusks in the family Architectonicidae, the staircase shells or sundials.^[1]

Spirolaxis
Shell of Spirolaxis centrifuga (specimen at MNHN, Paris)
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Mollusca
Class:	Gastropoda
Infraclass:	Lower Heterobranchia
Superfamily:	Architectonicoidea
Family:	Architectonicidae
Genus:	Spirolaxis Monterosato, 1913
Type species
Spirolaxis centrifuga (Monterosato, 1890)
Synonyms
Aguayodiscus Jaume & Borro, 1946 Paurodiscus Rehder, 1935 Pseudomalaxis (Paurodiscus) Rehder, 1935 Pseudomalaxis (Spirolaxis) Monterosato, 1913 (original rank as subgenus) Spirolaxis (Aguayodiscus) Jaume & Borro, 1946

Description

(Original description) The shell is discoidal; its whorls are quadrangular, detached, and solute. ^[2]

Species

• Spirolaxis argonauta Bieler, 1993
• Spirolaxis centrifuga (Monterosato, 1890)
• Spirolaxis clenchi Jaume & Borro, 1946
• † Spirolaxis cohaerentia Laws, 1944
• Spirolaxis cornuammonis (Melvill & Standen, 1903)
• Spirolaxis cornuarietis Bieler, 1993
• Spirolaxis exornatus Bieler, 1993
• Spirolaxis lamellifer (Rehder, 1935)
• Spirolaxis rotulacatharinea (Melvill & Standen, 1903)

Synonyms

• Spirolaxis macandrewi (Iredale, 1911): synonym of Spirolaxis centrifuga (Monterosato, 1890)