Lesueurillidae is an extinct family

Family (biology)

In biological classification, family is* a taxonomic rank. Other well-known ranks are life, domain, kingdom, phylum, class, order, genus, and species, with family fitting between order and genus. As for the other well-known ranks, there is the option of an immediately lower rank, indicated by the...

 of paleozoic molluscs (gastropods?) with anisostrophically coiled shells of uncertain position (Gastropoda?) (according to the taxonomy of the Gastropoda by Bouchet & Rocroi, 2005

Taxonomy of the Gastropoda (Bouchet & Rocroi, 2005)

The taxonomy of the Gastropoda as it was revised by Philippe Bouchet and Jean-Pierre Rocroi is currently the most up-to-date overall system for classifying gastropod mollusks...

).

Taxonomy

The taxonomy of the Gastropoda by Bouchet & Rocroi, 2005

Taxonomy of the Gastropoda (Bouchet & Rocroi, 2005)

The taxonomy of the Gastropoda as it was revised by Philippe Bouchet and Jean-Pierre Rocroi is currently the most up-to-date overall system for classifying gastropod mollusks...

 categorizes Lesueurillidae in the superfamilia Euomphaloidea

Euomphaloidea

Euomphaloidea, originally Euomphalacea, is an extinct superfamily of marine molluscs that lived from the Early Ordovician to the Late Cretaceous, included in the Gastropoda but speculated as instead perhaps Monoplacophora.-Description:...

 within the Paleozoic molluscs with anisostrophically coiled shells of uncertain position (Gastropoda?). This family has no subfamilies.

Genera

Genera in the family Lesueurillidae include

• Eccyliopterus Remelé, 1888
  • Eccyliopterus abendanoni
  • Eccyliopterus alatus (Roemer, 1876) - type species
  • Eccyliopterus corniculum
  • Eccyliopterus declivis Koken, 1925 - synonym: Eccyliopterus spirillum.
  • Eccyliopterus incresens
  • Eccyliopterus ottawaensis
  • Eccyliopterus owenanus
  • Eccyliopterus regularis - synonym: Eccyliopterus princeps.
  • Eccyliopterus replicata
  • Eccyliopterus septiferus
  • Eccyliopterus tolli
  • Eccyliopterus vagrans

• Lesueurilla Koken, 1898 - type genus
  Type genus
  In biological classification, a type genus is a representative genus, as with regard to a biological family. The term and concept is used much more often and much more formally in zoology than it is in botany, and the definition is dependent on the nomenclatural Code that applies:* In zoological...
  
   of the family Lesueurillidae
  • Lesueurilla acutangulum
  • Lesueurilla bohemica
  • Lesueurilla beloitensis
  • Lesueurilla dilatata
  • Lesueurilla grandis
  • Lesueurilla helix
  • Lesueurilla infundibulum (Koken, 1896) - type species
  • Lesueurilla isabellaensis
  • Lesueurilla kushanensis
  • Lesueurilla louderbacki
  • Lesueurilla magna
  • Lesueurilla prima
  • Lesueurilla shirakii
  • Lesueurilla sinkiangensis

• Mestoronema P. J. Wagner
  Peter J. Wagner
  Peter J. Wagner is a paleontologist and curator at the Smithsonian Institution. He received his Ph.D. in Geophysical Sciences from The University of Chicago in 1995, conducted postdoctoral research at the Smithsonian Institution, and served as a curator at the Field Museum of Natural History from...
  
  , 2002
  • Mestoronema bipatellare Koken, 1925 - type species
  • Mestoronema marginalis (Koken, 1925)
  • Mestoronema scotica (Longstaff, 1924)

Description

Fossils of family Lesueurillidae has sharp peripheral band and a short notch formed from deep V-shaped sinus. They are similar to Maclurites but they differ in early ontogenesis from them.