Hollardops

Hollardops is a genus of trilobite in the order Phacopida that lived during the Eifelian of the Middle Devonian.[1] It was described by Le Maître in 1952 under type species Metacanthina mesocristata. The genus underwent reclassification in 1997 under its current name Hollardops. Their fossils are found in present-day Morocco. They share similarities with Greenops of New York and Canada, but are generally larger than most Greenops species.

Hollardops
Temporal range:
Hollardops mesocristata
Houston Museum of Natural Science - DSC01602
Scientific classification
Kingdom:
Animalia
Phylum:
Arthropoda
Class:
Trilobita
Order:
Phacopida
Suborder:
Phacopina
Superfamily:
Acastoidea
Family:
Acastidae
Subfamily:
Asteropyginae
Genus:
Hollardops

Morzadec, 1997
Species
  • Metacanthina mesocristata Le Maître, 1952
  • H. aithassainorum Chatterton et al., 2006
  • H. burtandmimiae Lieberman & Kloc, 1997
  • H. boudibensis Morzadec, 2001

Description
Hollardops mesocristata
Houston Museum of Nat. Sci. - DSC01611
Both specimen are from Tazoulait Formation at
Jbel (Jebel) Oufatène 30.8374368°N 4.9018067°W / 30.8374368; -4.9018067 (Jbel Oufatène)[2]
and Issimour 30.9669834°N 5.0373266°W / 30.9669834; -5.0373266 (Jbel Issimour)[3]
SE of Alnif, western of Oued Alnif, Ma'ider region, Morocco

Hollardops have schizochroal eyes and a glabella that is slightly raised on the surface of the cephalon. Genal spines extend from the cephalon and extend to approximately the 6th thoracic segment.

Hollardops has 11 thoracic segments and also has 5 pairs of spines extending from the segments of the pygidium.

Length ranges from approximately 3 to 9 cm.

References
  1. "Fossilworks: Hollardops". fossilworks.org. Retrieved 17 December 2021.
  2. Google Maps: Jebel Oufatene
  3. Google Maps: [Jebel] Issimour
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