Tabulata / 15th December 2016
CORONADO I., RODRIGUEZ S. 2014. Carboniferous auloporids from the Iberian Peninsula: palaeoecology, diversity and spatio-temporal distribution. Journal of Iberian Geology 40, 1: 61-85.
Auloporid corals are common in the Palaeozoic and very frequent in the Carboniferous buildups of the Iberian Peninsula. The aim of this study is to analyze the diversity of these corals through a taxonomical recognition of the species and morphotypes that occur in the Iberian Peninsula. Eighteen sections have been sampled between the Ossa-Morena (Mississippian) and Cantabrian (Pennsylvanian) zones dated as upper Visťan to early Kasimovian. In addition, other localities where auloporids occur and are cited in the literature have been also used for this study. The taxonomical identification has been carried out using the criteria proposed by Tchudinova (1980) with little modifications. Thus, eighteen morphotypes and two species belonging to nine nominal genera have been identified (Multithecopora sp. A-H, Syringopora sp. A-B, Aulopora sp. A-B, Cladochonus sp. A-B, Syringoalcyon sp., Roemeripora sp., Sinopora sp., Mastopora? sp., Multithecopora hontoriense and Neomultithecopora cantabrica). Through a classical microfacies study, the environments where the auloporids lived have been identified, as well as the growth patterns and the features of sedimentation. Finally, a preliminary biostratigraphic range chart for the Carboniferous auloporoids from the Iberian Peninsula has been achieved. [original abstract; Rodriguez]
CORONADO I., RODRIGUEZ S. 2016. Biomineral structure and crystallographic arrangement of cerioid and phaceloid growth in corals belonging to the Syringoporicae (Tabulata, Devonian-Carboniferous): a genetic reflection. Geological Magazine 153, 4:, 718-742. http://dx.doi.org/10.1017/S0016756815000862
An extensive study of the microstructure, nanostructrure and crystallographic properties of six taxa belonging to four different genera of Devonian and Carboniferous Syringoporicae showing dense phaceloid (Pleurosiphonella), pseudocerioid (Neomultithecopora) and cerioid growth patterns (Roemeria and Roemeripora) has been done in order to disclose the similarities and differences in the growth processes at the biomineral scale and understand the growth processes that provide organisms with an evolutionary advantage to colonize different habitats. All the skeletons have similarities regarding the biocrystallization process, showing that the Syringoporicae skeletons are a product of matrix-mediated biocrystallization. Micro- and nanotextural features are common in all of the skeletons studied, showing that they were composed of hierarchical structures. All studied taxa possess a complex nanostructure composed of co-oriented rounded nanocrystals with different sizes and morphologies, depending on the taxon. The identified microstructures include granules, lamellae, fibres and hyaline elements. The crystallographic techniques demonstrate that all of them except the hyaline elements are biogenic in origin. Granules could be aborted fibres during the growth of two corallites in contact. On the other hand, the study of the biomineral properties suggests that the skeleton structure is a reflection of the genetic code. The median lamina was formed by the joint crystallization of both polyps at the same time. The variation in the internal structural organization (phaceloid, pseudocerioid or cerioid) was conditioned by the environment (stressful situations or feeding strategies); on the contrary, the final structure is controlled by genetics and their crystallographic properties are characteristic for each internal structural organization. [original abstract; Rodriguez]
KLEVTSOVSKIY A., OGAR V. 2013. Deyaki Syringopora z nyzhnego karbonu pivdennoyi pribortovoyi zony Dniprovsko-Donetskoyi zapadyny [Some Syringopora from the Lower Carboniferous of southern near-edge zone of the Dnieper-Donets depression]. Paleontological Review 45: 28-36; 149 [In Ukrainian].
Two species of syringoporid corals: Syringopora intermixa Reed, 1927 and Syringopora geniculata Phillips, 1836 from the Lower Carboniferous of southern marginal zone of the Dnieper-Donets depression are described. These species confirm Visťan age of the carbonate rocks widespread here.
KROL J. J., ZAPALSKI M. K., JAKUBOWICZ M., BERKOWSKI B. 2016. Growth strategies of the tabulate coral Favosites bohemicus on unstable, soft substrates: An example from the Hamar Laghdad (Lower Devonian, Anti-Atlas, Morocco). Palaeogeography, Palaeoclimatology, Palaeoecology 449: 531-540 (1 May 2016).
[keywords: Tabulata; Mud mounds; Devonian; Favosites; Paleoecology]
Coralla of the tabulate coral Favosites bohemicus coming from the famous Kess-Kess mud mound locality of the Hamar Laghdad (SE Morocco) area have been studied with respect to their growth patterns and colony development. The Emsian Kess-Kess mounds developed in a relatively deep-water, low-energy environment, below fair-weather wave-base. After the mound growth ceased, the slopes of the mounds were covered by soft, muddy sediment and colonised by tabulate corals. The morphological characteristics of F. bohemicus coralla analysed in the present study document various responses of the coral colonies to sediment creeping on the steeply inclined slopes. The coralla are massive and display a strong variability in shape and size; most of the specimens are, however, of spherical and sub-spherical shape. The striking feature of the majority of the colonies is that they are either deflected and tilted in one direction, or display indications of being continuously overturned, both features reflecting changes in growth direction of the corals. The tilted and curved direction of growth was likely caused by the slow creeping of the sediment, along with which the colonies were being slowly moved down the slope. The most important factor that controlled the intensity of the mass movements was presumably the slope inclination, which varied among both different mounds and different slopes of individual mounds. Since corals affected differently by mass movements of variable strength attained various sizes and shapes, morphological analyses of F. bohemicus provide clues on the sediment characteristics, as well as type and frequency of mass movements in the cover of the Kess-Kess mud mounds, enabling valuable insights into the initial stages of their burial. [original abstract; Wrzolek]
LIANG Kun, ELIAS R. J., CHOH Suk-Joo, LEE Dong-Chan, LEE Dong-Jin 2016. Morphometrics and paleoecology of Catenipora (Tabulata) from the Xiazhen Formation (Upper Ordovician), Zhuzhai, South China. Journal of paleontology 90, 6: 1027-1048.
Catenipora is one of the most common tabulate coral genera occurring in various lithofacies in the Upper Ordovician Xiazhen Formation at Zhuzhai in South China. A combination of traditional multivariate analysis and geometric morphometrics is applied to a large number of specimens to distinguish and identify species. Based on three major principal components extracted from 11 morphological characters, three major groups as determined by the cluster-analysis dendrogram are considered to be morphospecies. Their validity and distinctiveness are confirmed by discriminant analysis, descriptive statistics, and bivariate plots. Tabularium area and common wall thickness are the most meaningful characters to distinguish the three morphospecies. Geometric morphometrics is adopted to compare the morphospecies with types and/or figured specimens of species previously reported from the vicinity of Zhuzhai. Despite discrepancies in corallite size, principal component analysis and discriminant analysis, as well as consideration of overall morphological characteristics, indicate that the morphospecies represent C. zhejiangensis Yu in Yu et al., 1963, C. shiyangensis Lin and Chow, 1977, and C. dianbiancunensis Lin and Chow, 1977. * Catenipora occurs in seven stratigraphic intervals in the Xiazhen Formation at Zhuzhai, representing a variety of heterogeneous environments. The coralla preservation is variable due to differential compaction; coralla preserved in limestones are commonly intact and in growth position, whereas those in shales are mostly crushed or fragmentary. The size and shape of corallites are considered primarily to be species-specific characters, but are also related to the depositional environments. In all species, morphological characters, including corallite size, septal development, and shape and size of lacunae, show high variability in accordance with lithofacies and stratigraphic position. The intraspecific differences in corallite size at various localities in the Zhuzhai area may indicate responses to local environmental factors, but may also reflect genetic differences if there was limited connection among populations. [original abstract; Wrzolek]
OGAR V. 2011. Novi tabulaty z turneiskykh vidkladiv Donbasu [New Tabulate corals from the Tournaisian deposits of the Donets Basin]. Paleontological Review 3: 77-83, 138-139 [In Ukrainian]
Two new species of cerioid tabulate corals from the Upper Tournaisian of the Donets Basin are described. The unusual median line of Michelinia sinuosa sp. nov. is zigzag in cross-sections. Roemeripora spinosa sp. nov. has large corallites, triangular septa at corallite walls, and long and pointed tabular spines.
TSYGANKO V. S. 2016. A new coral genus (Tabulata) from the Upper Devonian of the Subpolar Urals. Paleontological Journal 50, 1: 29-33.
[keywords: Coelenterata; Tabulata; new taxa; Upper Devonian; Subpolar Urals]
A new tabulate genus, Sokolovia gen. nov., with the type species S. pershinae sp. nov., from the Upper Devonian (Lower Famennian Substage) of the western slope of the Subpolar Urals is described. [original abstract; Wrzolek]
ZAPALSKI M. K., BERKOWSKI B., WRZOLEK T. 2016. Tabulate Corals after the Frasnian/Famennian Crisis: A Unique Fauna from the Holy Cross Mountains, Poland. PLoS ONE 11 (3): e0149767. doi:10.1371/journal.pone.0149767
Famennian tabulate corals were very rare worldwide, and their biodiversity was relatively low. Here we report a unique tabulate fauna from the mid- and late Famennian of the western part of the Holy Cross Mountains (Kowala and Ostrowka), Poland. We describe eight species (four of them new, namely ?Michelinia vinni sp. nov., Thamnoptychia mistiaeni sp. nov., Syringopora kowalensis sp. nov. and Syringopora hilarowiczi sp. nov.); the whole fauna consists of ten species (two others described in previous papers). These corals form two assemblages - the lower, mid-Famennian with Thamnoptychia and the upper, late Famennian with representatives of genera ?Michelinia, Favosites, Syringopora and ?Yavorskia. The Famennian tabulates from Kowala represent the richest Famennian assemblage appearing after the F/F crisis (these faunas appear some 10 Ma after the extinction event). Corals described here most probably inhabited deeper water settings, near the limit between euphotic and disphotic zones or slightly above. At generic level, these faunas show similarities to other Devonian and Carboniferous faunas, which might suggest their ancestry to at least several Carboniferous lineages. Tabulate faunas described here represent new recruits (the basin of the Holy Cross mountains was not a refuge during the F/F crisis) and have no direct evolutionary linkage to Frasnian faunas from Kowala. The colonization of the seafloor took place in two separate steps: first was monospecific assemblage of Thamnoptychia, and later came the diversified Favosites-Syringopora-Michelinia fauna. [original abstract; Wrzolek; the paper illustrates also a heterocoral Oligophylloides pachythecus accompanying Thamnoptychia]