Abstract
AbstractKnown antennae of trilobites are all flagelliform, in marked contrast to the varied first antennae of marine pancrustaceans. An exceptionally preserved specimen of the Early Ordovician (late Tremadocian) asaphid Asaphellus tataensis Vidal, 1998, from the Fezouata Shale in Morocco, exhibits both antennae in situ; they are relatively short, widen distally, and bear a series of round, dome-shaped organs along both their dorsal and ventral surfaces. These organs are vastly larger than chemo- or mechanosensory sensilla on the antennae of other arthropods, rendering their homology and function uncertain. The clavate antennae of Asaphellus reveal the furthest deviation from the inferred ancestral state of the trilobite antenna known to date. This could be an adaptation for detection of prey, because most Asaphidae have been claimed as predators and scavengers on the basis of specialized features of the calcified exoskeleton.
Publisher
Cambridge University Press (CUP)
Reference33 articles.
1. Li., S.-J. , Kang, C.-L. , and Zhang, X.-G. , 1990, [Sedimentary environment and trilobites of lower Cambrian Yuxiansi Formation in Leshan district, Sichuan]: Bulletin of the Chengdu Institute of Geology and Mineral Resources, Chinese Academy of Geological Sciences, no. 12, p. 37–60. [in Chinese with English summary]
2. Ontogeny of the articulated yiliangellinine trilobite Zhangshania typica from the lower Cambrian (Series 2, Stage 3) of southern China
3. Biostratigraphic and palaeoenvironmental controls on the trilobite associations from the Lower Ordovician Fezouata Shale of the central Anti-Atlas, Morocco
4. Ordovician faunas of Burgess Shale type
5. Appendages of an early Cambrian metadoxidid trilobite from Yunnan, SW China support mandibulate affinities of trilobites and artiopods
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