Description
Cone flattened , not rotated ; canal margin often spiny ; pockets and folds in canal wall ; body leaf- shaped , flattened; ten genera. 1. Many spines on body ..... .. ..... ... .... ....................... 2 1'. Spines on body few , short, or none ... .. ........ ...... 5 2. Spines long , on canal margin and on body ... .... ..... . . . .. . .. . . . . . . . .. . .. . .. . .. . . . . . . . .. . .. . .. . .. . 2'. Spines short, only on body ...... .. .. .. .... .... ..... ...... .. 3 3. Body small , square ; few short spines , on body .... . . . . . .. . .. . .. . . . . .. . .. . .. . .. . .. . .. . . . . . . . . . 3'. Body long ; many short spines on body .. ..... ... .... . .4 4. Spines only on oral half of body .. ... Oxychonina 4'. Spines at least on aboral half of bodyEriochona 5. Short stalk ....... .. ..... .. ........... ... ... .... . Stylochona 5'. Long stalk .... ... ... .... ..... .. .... ...... .. ..... ..... ...... .. ... 6. Some spines on basal part of cone near neck ; cone margin smooth ... .... ... ... ......... .. Armichona 6'. No such spines ; cone ma rgin with many small indentations ......................... ......... Flectichona
Type species
Figures
No linked figures.
Raw text
Cone flattened , not rotated ; canal margin often spiny ; pockets and folds in canal wall ; body leaf- shaped , flattened; ten genera. 1. Many spines on body ..... .. ..... ... .... ....................... 2 1'. Spines on body few , short, or none ... .. ........ ...... 5 2. Spines long , on canal margin and on body ... .... ..... . . . .. . .. . . . . . . . .. . .. . .. . .. . . . . . . . .. . .. . .. . .. . 2'. Spines short, only on body ...... .. .. .. .... .... ..... ...... .. 3 3. Body small , square ; few short spines , on body .... . . . . . .. . .. . .. . . . . .. . .. . .. . .. . .. . .. . . . . . . . . . 3'. Body long ; many short spines on body .. ..... ... .... . .4 4. Spines only on oral half of body .. ... Oxychonina 4'. Spines at least on aboral half of bodyEriochona 5. Short stalk ....... .. ..... .. ........... ... ... .... . Stylochona 5'. Long stalk .... ... ... .... ..... .. .... ...... .. ..... ..... ...... .. ... 6. Some spines on basal part of cone near neck ; cone margin smooth ... .... ... ... ......... .. Armichona 6'. No such spines ; cone ma rgin with many small indentations ......................... ......... Flectichona