The Earliest Annelids: Lower Cambrian Polychaetes from the Sirius Passet Lagerstätte, Peary Land, North Greenland

  title={The Earliest Annelids: Lower Cambrian Polychaetes from the Sirius Passet Lagerst{\"a}tte, Peary Land, North Greenland},
  author={Simon Conway Morris and John S. Peel},
Apart from the Phyllopod Bed of the Burgess Shale (Middle Cambrian) polychaete annelids are practically unknown from any of the Cambrian Lagerstätten. This is surprising both because their diversity in the Burgess Shale is considerable, while to date the Chengjiang Lagerstätte which is equally impressive in terms of faunal diversity has no reliable records of any annelids. Here we describe, on the basis of about 40 specimens, Phragmochaeta canicularis gen. et sp. nov. from the Lower Cambrian… 

New Palaeoscolecidan Worms from the Lower Cambrian: Sirius Passet, Latham Shale and Kinzers Shale

These finds from Greenland provide further evidence that palaeoscolecidans possessed a complex anterior introvert directly comparable to a number of priapulid-like taxa from other Burgess Shale-type assemblages.

Lower Cambrian polychaete from China sheds light on early annelid evolution

A fossilized polychaete annelid, Guanshanchaeta felicia gen. G. et sp.

Sclerite-bearing annelids from the lower Cambrian of South China

Two new annelids from the Lower Cambrian Chengjiang Lagerstätte, South China are reported - Adelochaeta sinensis n.

A Corset-Like Fossil from the Cambrian Sirius Passet Lagerstätte of North Greenland and Its Implications for Cycloneuralian Evolution

A large (maximum length 80 mm), tubular, corset-like problematic fossil from the early Cambrian Sirius Passet Lagerstätte of North Greenland is interpreted as the lorica of an ancestral loriciferan, placing it within the total-group of Loricifera, within the Lricifera + Nematomorpha clade.

A new arthropod from the Early Cambrian of North Greenland, with a ‘great appendage’‐like antennula

  • M. Stein
  • Environmental Science, Geography
  • 2010
Siriocaris trolla, is a new arthropod that similarities with trilobites and certain ‘trilobitomorphs’ but seems to lack important synapomorphies of these taxa, though this may be due to preservational limitations in the material at hand.

A Possible Anomalocaridid from the Cambrian Sirius Passet Lagerstätte, North Greenland

It is described for the first time an appendage with possible anomalocaridid affinities as suggested by an overall gross morphology similar to that of the frontal appendage of Anomalocaris from other localitites.

Cambrian stem-group annelids and a metameric origin of the annelid head

It is proposed that the palps of Canadia are on an anterior segment bearing neuropodia and that the head of Phragmochaeta is formed of a segment bearing biramous parapodia and chaetae, suggesting that the annelid head was originally a parapodium-bearing segment.

The Buen Formation (Cambrian Series 2) biota of North Greenland

The diverse metazoan fauna from the upper member of the Buen Formation of North Greenland is described as a complement to published descriptions of the exceptionally preserved fauna of the Sirius

First palaeoscolecid from the Cambrian (Drumian, Miaolingian) Marjum Formation of western Utah, USA

The middle Marjum Formation is one of five Miaolingian Burgess Shale-type deposits in Utah, USA. It preserves a diverse non-biomineralized fossil assemblage, which is dominated by panarthropods and

Jaw-bearing polychaetes of the Silurian Eramosa Lagerstätte, Ontario, Canada

Abstract. The Wenlock (middle Silurian) Eramosa Lagerstätte of the Bruce Peninsula, Ontario, Canada, is becoming known for its rich and diverse faunas, different preservational styles, and a



Articulated Halkieriids from the Lower Cambrian of North Greenland and their Role in Early Protostome Evolution

The hypothesis of halkieriids and their relatives having a key role in annelid-brachiopod-mollusc evolution is in accord with some earlier proposals and recent evidence from molecular biology, but casts doubt on a number of favoured concepts.

Articulated halkieriids from the Lower Cambrian of north Greenland

METAZOAN skeletons appear abruptly in the fossil record near the base of the Cambrian (∼540MyrBP (before present))1,2. In the initial stages of diversification, familiar skeletal remains such as

Kleptothule rasmusseni gen. et sp. nov.: an ?olenellinid-like trilobite from the Sirius Passet fauna (Buen Formation, Lower Cambrian, North Greenland)

  • G. Budd
  • Biology
    Transactions of the Royal Society of Edinburgh: Earth Sciences
  • 1995
A new arthropod from the fauna, Kleptothule rasmusseni, is described, possessing a trilobed exoskeleton which is divided into distinct cephalic, thoracic and caudal regions and raises some issues discussed by Lauterbach (1983) in his assignment of some olenellids to the stem-group of the chelicerates.

Isoxys (Arthropoda) from the Early Cambrian Sirius Passet Lagerstätte, North Greenland

The marine offshore shelf mudstones of the Early Cambrian Buen Formation at Sirius Passet, North Greenland, contain a rich Konservat-Lagerstätte which includes abundant well-preserved material of the

Palaeobiology, taphonomy and stratigraphic significance of the trilobite BUENELLUS from the Sirius Passet Biota, Cambrian of North Greenland

The nevadiid Buenellus higginsi, one of the earliest known trilobites from Laurentia, seems to have played an important role in the Sirius Passet ecosystem, serving both as predator on, and prey for, contemporary animals.

Stem group arthropods from the Lower Cambrian Sirius Passet fauna of North Greenland

  • G. Budd
  • Geography, Environmental Science
  • 1998
Discussion of fossil evidence for the origin and early evolution of the arthropods has been dominated for many years by the evidence from the Middle Cambrian Burgess Shale from British Columbia

Middle Cambrian Polychaetes from the Burgess Shale of British Columbia

To place the Burgess Shale polychaetes in some geological perspective other Cambrian worms, including a polychaete from the Spence Shale of Utah, are briefly redescribed and the late Precambrian (Ediacarian) worms Dickinsonia, Spriggina and Marywadea are assessed.

A Burgess shale-like fauna from the Lower Cambrian of North Greenland

The 'Cambrian explosion' refers to the major adaptive radiation of the metazoans during the earliest Phanerozoic, an event that is best known by the abrupt appearance of hard parts near to the

The morphology and phylogenetic significance of Kerygmachela kierkegaardi Budd (Buen Formation, Lower Cambrian, N Greenland)

  • G. Budd
  • Biology, Geography
    Transactions of the Royal Society of Edinburgh: Earth Sciences
  • 1998
The combination of characters found in Kerygmachela allows it to be allied with the lobopods, represented in the extant fauna by the onychophorans, tardigrades, and possibly the pentastomids, and in the Cambrian fossil record by a morphologically diverse set of taxa, some of which are not assignable to the extant groupings.

The taphonomy and affinities of the problematic fossil Myoscolex from the Lower Cambrian Emu Bay Shale of South Australia

Most of the specimens of Myoscolex ateles Glaessner, 1979, the most abundant soft-bodied taxon in the Big Gully fauna from the Lower Cambrian Emu Bay Shale of South Australia, preserve only the