Subclass
|
Order/suborder
|
No. of families per subclass
|
No. of families per (sub)order
|
No. of families where attachment pattern is known
|
Attachment pattern (O, V, P, D)
|
% of families per subclass where attachment pattern is known
|
% of families per order where attachment pattern is known
|
---|
Plectronoceratia
|
Plectronoceratida
|
4
|
2
|
2
|
O
|
50
|
100
|
Yanheceratida
|
1
|
0
|
?
|
0
|
Protactinoceratida
|
1
|
0
|
?
|
0
|
Multiceratia
|
Ellesmeroceratida
|
48
|
7
|
3
|
O
|
35
|
43
|
Cyrtocerinida
|
3
|
1
|
O
|
33
|
Bisonoceratida
|
11
|
1
|
O
|
9
|
Oncoceratida
|
17
|
9
|
O
|
53
|
Discosorida
|
10
|
3
|
O
|
30
|
Tarphyceratia nov.
|
Tarphyceratida
|
12
|
10
|
6
|
V, Pl
|
67
|
60
|
Ascoceratida
|
2
|
2
|
V
|
100
|
Nautilia
|
Nautilida
|
24
|
24
|
8
|
Pl
|
33
|
33
|
Orthoceratia
|
Rioceratida
|
45
|
2
|
1
|
D
|
22
|
50
|
Dissidoceratida
|
9
|
1
|
D
|
11
|
Dissidoceratina
|
7
|
1
|
D
|
14
|
Troedssonellina
|
2
|
0
|
?
|
0
|
Orthoceratida
|
9
|
4
|
D
|
44
|
Pseudorthoceratida
|
3
|
0
|
?
|
0
|
Actinoceratida
|
8
|
1
|
D
|
13
|
Astroviida
|
8
|
2
|
D
|
38
|
Lituitina
|
2
|
2
|
D
|
100
|
Pallioceratina
|
6
|
0
|
?
|
17
|
Endoceratida
|
6
|
1
|
D
|
17
|
- Numbers of families are derived from the Treatise Part K 1964 and a range of subsequent publications. The numbers are inevitably subjective and dependent on opinions regarding the validity of particular family groupings. For sources of data regarding records of muscle attachment scars, see Online Appendix 1
- O oncomyarian, V ventromyarian, Pl pleuromyarian, D dorsomyarian