Table 1 Repetition of organs in monoplacophoran species
From: Monoplacophorans and the Origin and Relationships of Mollusks
Character | Taxon | |||||
|---|---|---|---|---|---|---|
Neopilina galatheae | Vema ewingi | Micropilina arntzi | Rokopella segonzaci | Micropilina minuta | Laevipilina antarctica | |
Shell size (mm) | 37 | 33 | 0.9 | 0.9 | 1.2 | 3 |
Shell muscles | 8 | 8 | 8 | – | – | 8 |
Gills | 5 | 6 | 3 | 5 | 4 | 5 |
Kidneys | 6 | 7 | 3 | – | – | 6 |
Gonads | 3 | 2 | 1 | – | – | 2/3 |
Atria | 2 | 2 | 0 | – | – | 2 |
Source | Wingstrand (1985) | Wingstrand (1985) | Haszprunar and Schaefer (1997b) | Warén and Bouchet (1990) | Haszprunar (2008) | Schaefer and Haszprunar (1997) |