(Chaetonotus)
- 80 - 370 µm - Scales unilobed with posterior incision
- Scales keeled at least up to half
- spines start at the posterior end
- spine length +/- the same, lengthens slightly to the posterior end
- all scales (except sometimes one dorsal / posterior) spined
- short spined field dorsal / posteriorly
80 Species:
Chaetonotus (C. ) hoanicus
200 µm - 260 µmDorsal scales: Head: 18-19 rows; body 10-11 rows with a total of 33-40 thin, strongly overlapping heptagonal to rectangular scales (19µm x 9µm), each bearing a spine (2µm - 40µm) with a secondary tip; short spiny field at the rear end
Ventral scales: ventral intermediate field with two curved, keeled terminal plates;8-9 rows of keel scales (partly spiny); oval, smooth scales in the pharynx region
Particularities: Distinct system of pharyngeal veins