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n.1.(Zool.) The chitinous fiber forming the spiral thread of the tracheæ of insects. See Illust. of Trachea.
Webster's Revised Unabridged Dictionary, published 1913 by G. & C. Merriam Co.
References in periodicals archive ?
The ichnofossils Taenidium and Helminthoidichnites are often interpreted as burrows produced by annelids and are typical of delta-front paleoenvironments.
According to Keighley and Pickerill (1994), Taenidium is distinguished from Beaconites and Ancorichnus in comprising burrows that are unlined and lack definition around the margin, likely due to active backfilling.
The traces Taenidium and Helminthoidichnites are usually thought to have been made by annelid worms.
The ichnogenus Beaconites and its distinction from Ancorichnus and Taenidium. Palaeontology, 37, pp.
The determined ichnotaxa are: Chondrites isp., Helminthoraphe flexuosa, Multina minima, Nereites irregularis, Ophiomorpha annulata, Ophiomorpha rudis, Paleodictyon strozzii, Planolites isp., ?Squamodictyon isp., and Taenidium crassum (Fig.
(1999): New Taenidium (trace fossil) in the Upper Cretaceous chalk of northwestern Europe.
Taenidium crassum Bromley, Ekdale and Richter, 1999
(1984) and Buatois and Mangano (1995, 2004) it is characterized by "horizontal meniscate backfilled traces Scoyenia, Beaconites, Taenidium, produced by feeders, Arthropod trackways such as Umfolozia, Merostomichnites, Diplichnites, Hexapodichnus, Permichnium and Acripes, horizontal trails: Cruziana and Rusophycus with also "simple forms (Planolites and Palaeophycus) sinuous crawling traces (Cochlichnus) and banana-shaped traces (Fuersichnus); vertical burrows are Skolithos, Cylindricum and Macanopsis.
Taenidium) and subvertical shafts defined by downward displacement of primary lamination (fugichnia).
Taenidium) may represent a returning opportunist exploring the new substrate for food, a washed-in "doomed pioneer" (cf.
Exclusively simple meniscate burrows (Taenidium barretti (Bradshaw)) are preserved endichnially within horizontally laminated and, occasionally climbing-, current-rippled red sandstones that interbed with horizontally laminated red mudstones and siltstones.
Trace fossils include Skolithos, Taenidium, and broad Arenicolites.