(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. ) lunatospinosus

Chaetonotus (C. ) machikanensis

Chaetonotus (C. ) maximus

120 µm - 230 µm
Dorsal scales: 11-14 Reihen, 23-28 pro Reihe, dreieckig 10-12 µm, keine Kiele, tiefer distaler Ausschnitt; Stacheln vorne 6-7 µm, hinten 14-17 µm, gebogen, keine Nebenspitze; 3 Paar laterale Stacheln am Hinterende dicker;
Ventral scales: Ventrales Zwischenfeld: 2 große Terminalplatten; Darmregion 5 Längsreihen überlappender Kielschüppchen; Halsregion 9 Querspangen
Particularities: ventrale Querspangen

Chaetonotus (C. ) microchaetus

Chaetonotus (C. ) minimus

Chaetonotus (C. ) mitraformis

Chaetonotus (C. ) multispinosus

85 µm - 150 µm
Dorsal scales: 17-19 rows of 38-40 circular scales each with distal cutout and short and simple spines
Ventral scales: 2-3 pairs of elongated, keeled terminal plates; 5-7 rows of small, round keel scales
Particularities: Bare toes; insufficiently described