aesthetasc(s)

See: esthetasc [Martin, 2005].

A long, tubular, sensory seta having thin cuticle, found on the antennula or antenna. Aesthetascs may have a chemosensory function, because males generally have more of these structures than females [Wilson, 1989].

Sensory seta covered by delicate cuticle, often projecting from antenna or antennule. (Syn. olfactory hair, esthetasc, esthete...) [McLaughlin, 1980].

Simple, tubular, thin-walled, chemosensory seta often found on the antennular flagellum [Holdich and Jones, 1983].

Spinelike cuticular processes often occurring in clumps or rows and functioning in chemoreception, usually located on the antennules [Brusca and Brusca, 2002].

(Order Cladocera):

One in a tuft of sensory projections at tip of each antennule. (Syn. esthete, olfactory seta) [Stachowitsch, 1992].

(Class Cephalocarida):

Elongate sensory projection at tip of each antennule. (Syn. esthete) [Stachowitsch, 1992].

(Order Cumacea):

One in a series of sensory projections on main flagellum of antennule [Stachowitsch, 1992].

(Order Tanaidacea):

One in a series of sensory projections on flagella of antennules [Stachowitsch, 1992].

(Order Decapoda):

One in a series of small sensory projections on outer flagellum of antennule. (Syn. esthetasc, esthete, olfactory hair) [Stachowitsch, 1992].

(Order Amphipoda):

One in a series of thin-walled sensory projections on antennule. See: calceolus [Stachowitsch, 1992].

(Order Isopoda):

One in a series of sensory projections on antennules. (uniramous, biramous, triramous) [Stachowitsch, 1992].

(Order Isopoda):

Thin-walled chemosensory seta usually found on antennular flagellum [Wetzer et al. 1997].

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^{Nomenclature of isopod cephalon (A). Examples of isopod mouth appendages: Idoteidae (B, C, F, H); Cirolanidae (D, E, G, I). [Wetzer et al. 1997]}

(Order Isopoda):

Thin-walled sensory seta usually on flagellum of antennule [Kensley and Schotte, 1989].

(Order Leptostraca):

One in a series of sensory projections on antennules and ocasionally also on antennae [Stachowitsch, 1992].

(Subclass Copepoda):

A thin-walled, sensory element with putative chemoreceptive function, found on the antennules [Boxshall and Halsey, 2004].

(Subclass Copepoda):

A transformed seta of antenna 1 or another oral appendage of copepodids. An aesthetasc usually has a sclerotized base but otherwise is poorly sclerotized; it often is considered to have a chemosensory function [Ferrari and Dahms, in press].

(Subclass Copepoda):

One in a series of small sensory projections along antennule. (Syn. esthetasc, esthete) [Stachowitsch, 1992].

(Subclass Mystacocarida):

Small sensory projection at tip of each antennule. (Syn. aesthete) [Stachowitsch, 1992].

(Class Ostracoda):

One in a series of small sensory projections along antennule or antenna; considered to be modified setae [Stachowitsch, 1992].

(Class Remipedia):

One of numerous robust, long sensory projections aggregated in several dense rows at base of antennules (on pad on first article of peduncle); directed posteriorly and partially covering antennae. (Syn. esthetasc, esthete, olfactory hair) [Stachowitsch, 1992].

(Order Thermosbaenacea):

One of several senory projections on larger of two flagellaf antennule [Stachowitsch, 1992].

(Order Euphausiacea):

One in a series of small sensory projections on each antennule [Stachowitsch, 1992].