Serpulids and other calcareous tube-dwelling encrusting polychaetes from the Early Cretaceous Agrio Formation (Neuquén Basin, Argentina)

Luci, Leticia; Garberoglio, Ricardo M.; Lazo, Darío G.

doi:10.1016/j.geobios.2012.06.003

Cited by 21 publications

(7 citation statements)

References 19 publications

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“…Regenhardt, 1961, who redescribed, amongst others, some Early Cretaceous serpulids and introduced several new taxa), there are only three comprehensive investigations analysing serpulid faunas of the Early Cretaceous. The generic composition of the serpulid community from the Hauterivian (~132 Ma) of South America (Garberoglio and Lazo, 2011;Luci et al, 2013) looks basically similar to that of the Jurassic. The only innovation is the abundance of coiled Neomicrorbis/ Pseudomicrorbis that were extremely rare in the Jurassic.…”

Section: Cretaceous (145-66 Ma): Further Diversificationmentioning

confidence: 85%

“…The earliest spirorbins, represented by characteristic largesized Neomicrorbis tubes (up to 6-7 mm in diameter) bearing numerous longitudinal rows of tiny tubercules appear to be of Early Cretaceous age (?Early Hauterivian, ~132 Ma, Luci et al, 2013;Late Barremian, ~126 Ma, Jäger, 2011;Late Berriassian, ~141 Ma, Ippolitov, unpubl.). Undescribed finds mentioned by Jäger (2005) from the Middle Jurassic (Late Bathonian; ~166 Ma) also seem to belong to Neomicrorbis (Jäger, unpubl.).…”

Section: The Rise Of Spirorbinaementioning

confidence: 99%

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Written in stone: history of serpulid polychaetes through time

et al. 2014

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Ippolitov, A.P., Vinn, O., Kupriyanova, E.K. and Jäger, M. 2014. Written in stone: history of serpulid polychaetes through time. Memoirs of Museum Victoria 71: 123-159.Although the fossil record of annelids in general is poor, calcareous tube-building Serpulidae are a notable exception. The "stumbling block" of understanding the serpulid fossil record is obtaining reliable taxonomic interpretations of fossil tubes based on morphology. Luckily, serpulid tubes demonstrate high variety of ultrastructures and nonuniform mineralogical composition, which can be used as new tools for decrypting the fossil record. Ancient Late Ediacaran (580-541 Ma) and Paleozoic (541-252 Ma) rocks contain diverse tubicolous fossils that have often been erroneously interpreted as annelids, and serpulids, in particular. Palaeozoic to Middle Jurassic coiled spirorbiform tubes, often referred to as Spirorbis, had been shown to be microconchids, a group of probable lophophorate affinity. The most ancient records of unequivocal serpulids date back to the Middle Triassic (~244 Ma) of the Mesozoic, and from the Earliest Jurassic (~200 Ma) fossil serpulids become common. From the latest Jurassic (~146 Ma) serpulids colonised hydrocarbon seep environments and possibly also penetrated the deep sea. Concerted efforts of paleontologists and zoologists are needed for further understanding of serpulid evolutionary history. The serpulid fossil record can become a valuable instrument for calibration of "molecular clocks" in polychaetes, which would allow dating not only divergence events in serpulids, but also in annelid groups that lack a representative fossil record.

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Section: Cretaceous (145-66 Ma): Further Diversificationmentioning

confidence: 85%

Section: The Rise Of Spirorbinaementioning

confidence: 99%

Written in stone: history of serpulid polychaetes through time

et al. 2014

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“…Habit and palaeoecological traits of encrusters agree well with the interpreted shallow, well-oxygenated, agitated marine environment and with a moderate to low turbidity setting. Most of the taxa (the oyster, sabellid, serpulids and several bryozoans) presented Tethyan affinities, which is also true for the basibiont (see 'Morphological and palaeoecological features of Prohinnites' above, Luci et al 2013;Taylor et al 2009), which indicates a temperate to warm water temperature. Oysters presented a strong tendency to gregariousness, although they may be found isolated as well.…”

Section: Taxonomic Composition Of the Encrusting Faunamentioning

confidence: 79%

“…Most of the taxa (the oyster, sabellid, serpulids and several bryozoans) presented Tethyan affinities, which is also true for the basibiont (see ‘Morphological and palaeoecological features of Prohinnites ’ above, Luci et al . ; Taylor et al . ), which indicates a temperate to warm water temperature.…”

Section: Resultsmentioning

confidence: 99%

Living on an island: characterization of the encrusting fauna of large pectinid bivalves from the Lower Cretaceous of the Neuquén Basin, west-central Argentina

Luci

Lazo

2015

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Exposed mollusc shells may act as benthic islands in soft bottoms, and the analysis of their encrusting faunas provides unique palaeoecological information. In the late Valanginian of the Agrio Formation (Neuquén Basin, west‐central Argentina), the large pectinid Prohinnites acted as a benthic island on soft substrates. Inequivalved Prohinnites adults with small, smooth cementing scars on the right valve suggest that a free reclining life habit followed the epibyssate juvenile and cementing phases. The encrusting fauna on Prohinnites was studied taxonomically and palaeoecologically by means of a quantitative approach. Over 90% of 123 valves presented encrusters. Encrustation was equally common in both valves. Internal encrustation was rare. The left umbonal region was less encrusted probably due to sediment accumulation or early colonization by soft‐bodied taxa. The fauna was composed of 14 encrusting taxa, including oysters, serpulids, sabellids and cyclostome bryozoans. Oysters exceeded 50% of the total abundance, but serpulids and bryozoans were more diverse. Serpulids and particularly oysters showed a gregarious life habit. Few interactions took place among encrusters and most were post‐mortem, involving the overgrowth of already dead oysters. The oysters were early settlers that took advantage of their gregarious behaviour to rapidly cover available hard surfaces. However, they were unable to exclude bryozoans and polychaetes, which settled on the pectinid's valves regardless of the presence of oysters. The studied fauna corresponds to a climax community that was structured by larval abundance rather than by competitive interactions; oysters settled first and replenished themselves while polychaetes and bryozoans settled over or alongside them

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“…Recently, a number of studies on hard substrate communities have been reported from the Lower Cretaceous of the Neuqu en Basin, west-central Argentina (Luci 2010;Luci et al 2013Luci et al , 2016Luci & Cichowolski 2014;Luci & Lazo 2015). They represent an ongoing work to report sclerobiont communities from Valanginian-Hauterivian shallow marine deposits, which contributes to the characterization of Mesozoic sclerobiont communities.…”

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confidence: 99%

Palaeoecological analysis of a sclerobiont fauna on a single basibiont across the Valanginian of the Neuquén Basin, west-central Argentina

Luci

Toscano

Lazo

2019

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Sclerobiont communities have proven their environmental and taphonomic value in extant and past settings; studies are beginning to quantify and evaluate their changes across time. Through the Valanginian of the Neuquén Basin, Argentina, trigonioids of the genus Steinmanella present an almost continuous record. Materials were collected from shales and shell beds across second‐order systems tracts (LST, TST and HST). Their sclerobiont communities were characterized and compared across systems tracts and facies. In addition, a link between them and coeval oyster mass occurrences (OMOs) was investigated, since studies on other local sclerobiont communities have consistently shown pronounced oyster dominance. Eleven sclerobiont taxa were found on Steinmanella (bryozoans, bivalves, foraminifers and polychaetes), of which oysters are usually strongly dominant but for the TST, in which their dominance is diminished. The sclerobiont community has a simple structure and interspecific relationships and competition for space seem to have had little importance. Few differences in richness, taxonomy and other parameters were found between facies. Across systems tracts, features of the sclerobiont communities are differentiated mostly from swings in relative abundance of taxa. The lowered oyster dominance in the TST may reflect a source–sink dynamics between OMOs (sources) and Steinmanella as sinks in shallower, soft substrate settings. Likely the sea‐level rise temporally drowned the oyster carbonate factory, resulting in decreased larvae emigration to the sinks and lowered oyster dominance during the TST.

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Serpulids and other calcareous tube-dwelling encrusting polychaetes from the Early Cretaceous Agrio Formation (Neuquén Basin, Argentina)

Cited by 21 publications

References 19 publications

Written in stone: history of serpulid polychaetes through time

Written in stone: history of serpulid polychaetes through time

Living on an island: characterization of the encrusting fauna of large pectinid bivalves from the Lower Cretaceous of the Neuquén Basin, west-central Argentina

Palaeoecological analysis of a sclerobiont fauna on a single basibiont across the Valanginian of the Neuquén Basin, west-central Argentina

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