a) they were scavengers, gathering to feed

a)     Hallucigenia Sparsa is a now extinctMiddle Cambrian libopodian.Bodystructure: H.

sparsa varied from 0.5 to 3cm in length. They hada pair of eyes on top of their head. Beneath their head was a long neck,connecting to its tubular body. Below the body was 10 pairs of appendages.

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Ontop of the body was 7 pairs of spines (Yeager, 2015). The mouth was of circularshape and the stomach lined with acicular teeth (Smith & Caron, 2105).There is a tubular, tail-like extension at the end of the body following theappendages. Protection: The sevenpairs of hard spines on top of the body protected it from predation, as well asthe appendages which provided manoeuvrability Diet:Carnivorous. S.

Conway Morris (1976) suggests that they were scavengers,gathering to feed on already dead prey and that they probably mainly grazed onimmobile organisms such as marine sponges. Habitat: Itlived in a marine environment, and it’s tentacle-like limbs acted as legsassisted in moving around the seafloor.  b)    H. sparsa’sability to escape from predators played a huge role in its survival success inthe beginning of the Cambrian explosion. It was able to pace the ocean floorusing its appendages with and against currents, advantageous in the event ofbeing hunted. Its spikes would have also produced great advantages inprotection against predators unlike other soft-bodied worms such as relativesof the Hallucigenia. In addition tothis, H. Sparsa were amongst the earlier organisms to evolve hard body parts sothis would have aided its succession in comparison to other soft-bodied organisms.

  c)     H.sparsa is now extinct, with arthropods as modern day living relatives. Theclosest living relative to H. sparsa is the velvet worm. Both species share theability of growing a new set of claws before they shed their skins in order togrow. H.

sparsa had this trait in their claws and the velvet worm has this inboth their claws and jaws. Although lacking the teeth lining within thestomach, velvet worms similarly have paired limbs also used for manoeuvrability(Oliveira & Mayer, 2013).


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