Perissocephalus
peh-ris-oh-SEF-uh-lus
Genus
the odd-headed one
Literally: odd-headed
| Part | Meaning | Language | Note |
|---|---|---|---|
| periss- | odd (in number), uneven; strange, extraordinary | Greek (perisso) | combining form perisso- with the final -o- serving as the connecting vowel to the next root |
| -o- | connecting vowel | links perisso- to cephal- | |
| -cephal- | head | Greek (cephal, -o) | from Greek kephalē; the -us ending makes it a masculine Latin second-declension noun in apposition |
| -us | masculine nominative singular ending | Latin | standard genus-name termination; grammatical gender: masculine |
A single compound genus name formed from two Greek roots joined by the connecting vowel -o-. The head noun is cephal- (head), modified by perisso- (odd/extraordinary). The whole word is treated as a Latin masculine noun (second declension, nominative singular -us), as required for a genus name under the ICZN. There is no specific epithet; this is a uninomial genus name.
Pronunciation
- peh-ris-oh-SEF-uh-lus Antepenult stress: the penult vowel (-a- in -al-) is short and followed by only one consonant before the final -us, so stress falls on the antepenult syllable (-ceph-/-SEF-). The 'ch' in cephalus = hard 'k' sound, rendered 'f' via the aspirate → 'ph' convention (kephalē). 'c' before 'e' would normally be 's', but -cephal- is always pronounced with initial 'k' by classical convention.
Other readings
One could theoretically parse periss- as 'around/beyond' (peri- + isso-), but the dictionary strongly supports perisso- as a single root meaning 'odd or extraordinary', making a one-root reading far more likely. Perissocephalus is a genus of Cotinga birds, and the male has a famously large, bare, oddly shaped head, which perfectly fits 'extraordinary head'.
The dictionary and a dictionary lookup confirmed both perisso and cephal are present in the dictionary. Perissocephalus tricolor is the sole species — a large Amazonian Cotinga whose males gather at leks; the swollen, bare-skinned head of the male is the likely anatomical inspiration for the genus name. The connecting vowel -o- is part of the perisso- combining form itself, so there is no additional connecting vowel inserted; perisso- + cephal- + -us flows naturally.