Sclerobionts, Shell Morphology and Biostratinomy on Ammonites: Two Early Cretaceous Cases From the Neuquén Basin, Argentina

Luci, Leticia; Cichowolski, Marcela; Aguirre-Urreta, Marı́a B.

doi:10.2110/palo.2015.052

Cited by 8 publications

(10 citation statements)

References 87 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This seems to have been a common tendency across the Agrio Formation at least, including examples of sclerobionts on ammonites, nautilids and pectinids (Luci & Cichowolski ; Luci & Lazo ; Luci et al . ). These sclerobiont communities presented similar taxonomic compositions, differing mainly in the relative abundances of sclerobiont taxa.…”

mentioning

confidence: 97%

“…Previous work on other molluscs collected from the Lower Cretaceous marine units of the Neuqu en Basin has shown several general patterns of the sclerobiont faunas. In other encrusted molluscs, the sclerobiont communities were found to be controlled mostly by the taxonomic composition of the larval stock and the individual sclerobiont species' recruitment rates, rather than by competitive relationships (Luci & Lazo 2015;Luci et al 2016; see also Keough 1984;Brett et al 2011 for other examples finding similar patterns). This seems to have been a common tendency across the Agrio Formation at least, including examples of sclerobionts on ammonites, nautilids and pectinids (Luci & Cichowolski 2014;Luci & Lazo 2015;Luci et al 2016).…”

mentioning

confidence: 97%

“…In other encrusted molluscs, the sclerobiont communities were found to be controlled mostly by the taxonomic composition of the larval stock and the individual sclerobiont species’ recruitment rates, rather than by competitive relationships (Luci & Lazo ; Luci et al . ; see also Keough ; Brett et al . for other examples finding similar patterns).…”

mentioning

confidence: 97%

“…This is remarkable since the molluscs studied so far involve nektonic (Luci et al . ), nektobenthic (Luci & Cichowolski ), benthic infaunal (Luci ) and epifaunal (Luci & Lazo ) life habits, from different geographical areas and stratigraphical units within the basin, and involving basibionts of contrasting taphonomic routes. The sclerobiont oysters belong to the genus Ceratostreon Bayle and they recurrently formed oyster mass occurrences (OMOs) in the Lower Cretaceous of the Neuquén Basin when environmental conditions allowed it (see Lazo ; Toscano et al .…”

mentioning

confidence: 99%

“…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.…”

mentioning

confidence: 99%

See 4 more Smart Citations

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

Luci

Toscano

Lazo

2019

LET

Self Cite

View full text Add to dashboard Cite

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.

show abstract

mentioning

confidence: 97%