Table 2. Microchiropteran and fossil microbat comparisons.
Character State
|
Icaronycteris |
Archaeonycteris |
Palaeochiropteryx |
Hassianycteris |
Tanzanycteris |
Microchiroptera |
Megachiroptera |
---|---|---|---|---|---|---|---|
Cochlea moderately enlarged |
X |
X |
* |
||||
Cochlea larger |
X |
X |
# |
||||
Cochlea greatly enlarged |
X |
# |
|||||
Phanerocochlear cochlea |
? |
? |
X |
X |
? |
# |
|
Periotic loosely attached to basisphenoid |
? |
X |
X |
? |
? |
# |
|
Orbicular apophysis on malleus enlarged |
X |
X |
X |
X |
? |
X |
|
Stylohyal with moderately expanded tip |
X |
X |
X |
? |
? |
# |
|
Stylohyal with greatly expanded tip |
? |
? |
# |
||||
Stapedial fossa deep and constricted |
? |
? |
X |
? |
? |
# |
|
P3 with two or fewer roots |
X |
X |
X |
? |
* |
X |
|
Nyctalodont dentition |
# |
X |
? |
# |
|||
Cervicals 2-3 with ventral accessory processes |
X |
X |
X |
X |
? |
X |
# |
Cervical 4 with ventral accessory process |
X |
X |
X |
? |
X |
||
Cervical 5 with ventral accessory process |
X |
? |
X |
||||
Ventral process of manubrium compresed |
X |
X |
X |
# |
X |
||
Ribs with posterior laminae |
X |
? |
X |
X |
X |
# |
X |
Ribs with anterior laminae |
? |
X |
? |
X |
# |
# |
|
Suprascapular process absent |
X |
X |
X |
X |
X |
# |
# |
Scapular dorsal articular facet present |
? |
X |
X |
X |
* |
||
Trochiter extends proximally to humeral head |
X |
X |
X |
# |
|||
Trochiter extends proximally beyond humeral head |
X |
X |
# |
||||
Wing digit II distal phalanx absent |
X |
X |
? |
X |
|||
Wing digit III distal phalanx absent |
X |
X |
X |
? |
# |
X |
|
Fibula thin and thread-like |
X |
X |
? |
# |
|||
Calcar present |
X |
X |
? |
* |
# |
Note. X = all specimens or taxa; # = most taxa; * = some taxa; ? = indeterminate; blank = not present or inapplicable.