Taenidium


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Tae`nid´i`um


n.1.(Zool.) The chitinous fiber forming the spiral thread of the tracheæ of insects. See Illust. of Trachea.
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.
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.
Likewise, an interpreted "single community" approach is not a valid criterion even though the 10-20 mm wide Taenidium barretti of TF35a occur stratigraphically subjacent to suite TF36a (ichnocoenosis E) that contains Hexapodichnus horrens tracks of similar width.
This ichnocoenosis comprises simple unbranched burrows (Planolites beverleyensis, Taenidium barretti) and rare systematically branched burrows (Phycodes pedum Seilacher), together with vertebrate trackways (types D and E of Keighley and Pickerill 1998).
The large Taenidium barretti of TF28a was also produced after the flood deposit.
Simple meniscate/pelleted Beaconites Vialov, Scoyenia White, burrows Taenidium Heer XIII.
Trace fossils include Skolithos, Taenidium, and broad Arenicolites.