(redirected from chaetae)
Also found in: Dictionary, Thesaurus, Encyclopedia.
Related to chaetae: setae


, pl.


(sē'tă, -tē),
A bristle or a slender, stiff, bristle-like structure.
Synonym(s): chaeta
[L. saeta or seta, a stiff hair or bristle]


n. pl. chae·tae (-tē′)
A bristle or seta, especially of an annelid worm.




a bristle-like structure, often chitinous (see CHITIN). The structures are found particularly in ANNELID worms, where they occur as projections on most segments, and serve as anchors for that segment during locomotion.


see seta.
References in periodicals archive ?
Chaetae on furcal area are notated after Weiner (1996).
IV in usual position above second proximal row of chaetae (Fig.
keulderae also has companion chaetae accompanying the hooded hooks for only the last two chaetigers (the presence of a winged chaeta with only the hooded hooks on the right neuropodia on chaetigers 7 and 8 in one specimen suggests that this is an anomaly), while the other two species have companion chaetae with the anterior hooded hooks.
Chaetigers 2-4, 6-8, notochaetae arranged in three tiers, chaetae of first tier short, slightly bent, unilimbate chaetae, second tier with longer, straight unilimbate chaetae, third tier with long lanceolate chaetae; posterior chaetigers with only simple capillary chaetae of two lengths.
Tibiotarsus sub-segmented, without differentiated chaetae, with exception of the presence of the smooth terminal chaetae on legs III, characteristic for the genus.
Labial chaetae all ciliated, only with one M, and r smaller than other.
Subcoxae 1 of legs I--III with 3, 4 and 4 chaetae, subcoxae 2 with 1, 4 and 4 chaetae respectively.
Anal valves with numerous acuminate chaetae; each lateral valve with a0, 2a1; upper valves with chaetae a0, 2b1, 2b2, c0, 2c1, 2c2 (Fig.
Anal valves with numerous acuminate chaetae; each lateral valve with chaetae a0, 2a1, and 2a2; upper valve with chaetae a0, 2b1, 2b2, c0, 2c1, and 2c2 (Fig.
The species name refers to both the sets of 4 papillae and 4 guard chaetae on Ant.
Hair and pectinate chaetae in the dorsal bundles of fore- and mid-body; ventral chaetae with slightly longer upper tooth anteriorly but with equal tooth in postclitellar segments.
The genus is characterized by the shape of the postantennal organ with numerous (11-20), compound vesicles, antennal III sense organ with 5 papillae and 2 ribbed sensory clubs, the presence of the chaeta d0 on head and chaeta p0 on abdominal tergum IV, abdominal tergum VI with 1 medial chaeta, tibiotarsal distal whorl with 9 chaetae, furcal area with 2+2 chaeta in 1 row (Weiner 1996; Pomorski 1998) and usually 2 manubrial rows mm and mp, chaetae from the ma row displaced on the level of dental microchaetae, male ventral organ usually present and anal spines absent.