First record of Loricifera from the Iberian Peninsula, with the description of Rugiloricus manuelae sp. nov., (Loricifera, Pliciloricidae)

Pardos, Fernando; Kristensen, Reinhardt Møbjerg

doi:10.1007/s10152-013-0349-0

Cited by 39 publications

(5 citation statements)

References 16 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The complexity of present day loriciferans, witnessed not least by the numerous circlets of more than 300 scalids on the introvert and neck [53], indicates that they were derived from much larger ancestors [3]. The macrobenthic species of Sirilorica are several hundred times larger than present day loriciferans but their known morphological organisation is relatively simple by comparison; the complexity of the miniaturised present day loriciferans no doubt reflects specialisation in their interstitial habitat.…”

Section: Methodsmentioning

confidence: 99%

Life Cycle and Morphology of a Cambrian Stem-Lineage Loriciferan

2013

Self Cite

View full text Add to dashboard Cite

Cycloneuralians form a rich and diverse element within Cambrian assemblages of exceptionally preserved fossils. Most resemble priapulid worms whereas other Cycloneuralia (Nematoda, Nematomorpha, Kinorhyncha, Loricifera), well known at the present day, have little or no fossil record. First reports of Sirilorica Peel, 2010 from the lower Cambrian Sirius Passet fauna of North Greenland described a tubular lorica covering the abdomen and part of a well developed introvert with a circlet of 6 grasping denticles near the lorica. The introvert is now known to terminate in a narrow mouth tube, while a conical anal field is also developed. Broad muscular bands between the plates in the lorica indicate that it was capable of movement by rhythmic expansion and contraction of the lorica. Sirilorica is regarded as a macrobenthic member of the stem-lineage of the miniaturised, interstitial, present day Loricifera. Like loriciferans, Sirilorica is now known to have grown by moulting. Evidence of the life cycle of Sirilorica is described, including a large post-larval stage and probably an initial larva similar to that of the middle Cambrian fossil Orstenoloricusshergoldii .

show abstract

Section: Methodsmentioning

confidence: 99%

Life Cycle and Morphology of a Cambrian Stem-Lineage Loriciferan

2013

Self Cite

View full text Add to dashboard Cite

show abstract

“…This is the case for, e.g. the hermaphroditic adult of Rugiloricus doliolius and Rugiloricus renaudae, the pre mega-larva of Urnaloricus gadi or the highly reduced postlarval stage of Rugiloricus manuelae (Gad 2005b, c;Heiner and Kristensen 2008;Kristensen et al 2013;Pardos and Kristensen 2013). Here, we describe the new species, Tenuiloricus shirayamai gen. nov. et sp.…”

Section: Introductionmentioning

confidence: 81%

A new type of loriciferan larva (Shira larva) from the deep sea of Shatsky Rise, Pacific Ocean

Neves

Kristensen

2013

Org Divers Evol

Self Cite

View full text Add to dashboard Cite

Loricifera is a phylum of minute animals that live exclusively in marine sediments. A total of 33 species have been described so far in this phylum; however, several more are already known from preliminary observations. Loriciferans are characterised by a complex life cycle, which involves a succession of several adult and larval stages. Here, we describe a new type of loriciferan larval stage: the Shira larva. The gross morphology of this larva is generally similar to that of the most prominent larval type of Loricifera, the so-called Higgins larva. However, the Shira larva possesses a number of unique features, namely (1) a single pair of anteroventral setae is present in the most anterior region of the abdomen, (2) the bases of the anteroventral setae are very large and swollen, (3) the thorax and abdomen are thinner than the introvert and (4) the abdominal region is divided into five sub-regions. Accordingly, we described the new species, Tenuiloricus shirayamai gen. nov. et sp. nov. (incertae sedis). The new findings are discussed from a comparative perspective with the Higgins larva as well as with the fossil of a putative loriciferan larval stage from the Middle Cambrian.

show abstract

“…Our knowledge on loriciferan fauna worldwide is thus very limited yet. Nevertheless, new species and life cycle stages are recurrently discovered (see e.g., Kristensen et al, 2013;Pardos and Kristensen, 2013), which is the case of a recently described type of larva, the so-called Shira larva . Based on this new larval type, the new genus and species Tenuiloricus shirayamai Neves and Kristensen, 2014 was described, which was listed as incertae sedis because of its unique because it is relatively smaller (reaching only 80% of the total adult size), its reproductive organs are not yet developed, and the seventh row of spinoscalids is absent or appears as protoscalids (Kristensen and Gad, 2004).…”

Section: Introductionmentioning

confidence: 98%