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Sea spider: Quiz


Question 1: In 2007 remarkably well-preserved fossils were exposed in fossil beds at La Voulte-sur-Rhone, near ________ in south-eastern France.

Question 2: The earliest fossils are known from the ________ 'Orsten' of Sweden, the Silurian Herefordshire Lagerst├Ątte of England and the Devonian Hunsr├╝ck Slate of Germany.
Geologic time scaleCambrian explosionEdiacaranCambrian

Question 3: Sea spiders have long been considered to belong to the ________, together with horseshoe crabs, true spiders, mites, ticks and scorpions.

Question 4: Researchers from the University of Lyon discovered about 70 fossils from three distinct species in the 160 million-year-old ________ La Voulte Lagerstatte.
CretaceousDinosaurGeologic time scaleJurassic

Question 5: They are most common in shallow waters, but can be found as deep as 7,000 ________, and live in both marine and estuarine habitats.
10 megametresMetre100 megametres1 decametre

Question 6: Recent work places the Pycnogonida outside the Arachnomorpha as basal Euarthropoda, or inside ________ (based on the chelifore-chelicera putative homology).

Question 7: All pycnogonid species have separate sexes except for one species that is ________.
BiologyIntersexualityHermaphroditeSexual differentiation

Question 8: [1] Most are carnivorous and feed on ________, sponges, polychaetes and bryozoans.

Question 9: Sea spiders, also called Pantopoda or pycnogonids, are marine ________ of class Pycnogonida.

Question 10: The anterior region consists of the proboscis, which has fairly limited dorsoventral and lateral movement, and three to four appendages including the ovigers, which are used in caring for young and cleaning as well as ________.
Mating (human)CourtshipMarriageDating

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