Junggon Kim, A. Taszakowski, M. Zmarzły, A. Herczek, Sunghoon Jung
Kim, J., Taszakowski, A., Herczek, A., Zmarzły, M., and Jung, S. 2023. New species of mirid insects and their importance for the higher classification of plant bugs. Acta Palaeontologica Polonica 68 (1): 75–83. The detailed morphological study based on the findings of well-preserved fossil specimens in Eocene Baltic amber revealed two new species, Metoisops michalskii Kim, Taszakowski, and Herczek sp. nov. and Metoisops popovi Kim, Taszakowski, and Jung sp. nov. The morphological information of the extinct genus Metoisops including diagnoses, descriptions of new species, and a species key are provided. The divided fourth antennal segment is depicted. The tribal transfer of Metoisops from Electromyiommini to Gigantometopini is proposed based on major morphological characters, five-six femoral trichobothria, presence of a deep incision between calli, and the structure of parameres. The need for a phylogenetic revision of the internal classification within Isometopinae is also discussed.
{"title":"New species of mirid insects and their importance for the higher classification of plant bugs","authors":"Junggon Kim, A. Taszakowski, M. Zmarzły, A. Herczek, Sunghoon Jung","doi":"10.4202/app.00991.2022","DOIUrl":"https://doi.org/10.4202/app.00991.2022","url":null,"abstract":"Kim, J., Taszakowski, A., Herczek, A., Zmarzły, M., and Jung, S. 2023. New species of mirid insects and their importance for the higher classification of plant bugs. Acta Palaeontologica Polonica 68 (1): 75–83. The detailed morphological study based on the findings of well-preserved fossil specimens in Eocene Baltic amber revealed two new species, Metoisops michalskii Kim, Taszakowski, and Herczek sp. nov. and Metoisops popovi Kim, Taszakowski, and Jung sp. nov. The morphological information of the extinct genus Metoisops including diagnoses, descriptions of new species, and a species key are provided. The divided fourth antennal segment is depicted. The tribal transfer of Metoisops from Electromyiommini to Gigantometopini is proposed based on major morphological characters, five-six femoral trichobothria, presence of a deep incision between calli, and the structure of parameres. The need for a phylogenetic revision of the internal classification within Isometopinae is also discussed.","PeriodicalId":50887,"journal":{"name":"Acta Palaeontologica Polonica","volume":"1 1","pages":""},"PeriodicalIF":1.8,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70480213","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"The Most Complete Bowfin (Amiidae: Amia sp.) from the Coal Creek Member of the Kishenehn Formation (Eocene), Northwestern Montana","authors":"Jacob D. Gardner, Mark Wilson","doi":"10.4202/app.00733.2020","DOIUrl":"https://doi.org/10.4202/app.00733.2020","url":null,"abstract":"","PeriodicalId":50887,"journal":{"name":"Acta Palaeontologica Polonica","volume":"1 1","pages":""},"PeriodicalIF":1.8,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70477393","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Carnassiform notches improve the functional efficiency of bat (Mammalia: Chiroptera) molar shearing crests","authors":"N. Czaplewski, Charles Baker","doi":"10.4202/app.00889.2021","DOIUrl":"https://doi.org/10.4202/app.00889.2021","url":null,"abstract":"","PeriodicalId":50887,"journal":{"name":"Acta Palaeontologica Polonica","volume":"1 1","pages":""},"PeriodicalIF":1.8,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70478753","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Lungfishes are one of the few early vertebrate clades with a rich 410-million-years-old fossil record. Lungfishes are characterized by a low evolutionary rate assumed to be associated with paedomorphosis since the Late Devonian. Lungfish paedomorphic trends include a reduction of the number of median fins, reduction of the number of cranial dermal bones, and reduction of the degree of neurocranial ossification. This neurocranial trait has evolved from heavily ossified in Devonian species to completely cartilaginous in post-Devonian species. Neurocranial conditions among derived Devonian lungfishes are needed to have a better understanding of paedomorphosis as a driving force during lungfish evolution. The neurocrania of two Devonian species, Scaumenacia curta (middle Frasnian, Escuminac Formation, eastern Canada) and Pentlandia macroptera (Givetian, Orcadian Basin, Scotland), have been micro-CT-scanned. These species were assumed to have a cartilaginous neurocranium like other “phaneropleurids” and “fleurantids”. Juvenile (or sub-adult) and adult specimens of S. curta possess cartilaginous neurocrania, whereas P. macroptera is now recognized to have a poorly ossified neurocranium. Pyrite filled neurocranial cavities preserving some endocranial structures (e.g., olfactory bulbs, semicircular canals) allow us to code for phylogenetic endocranial characters in S. curta. This unique mode of preservation suggests that occasionally pyrite is a preservative rather than a destructive diagenetic agent. In the evolutionary gap between Pentlandia and Scaumenacia, paedomorphosis had already resulted in reduction of neurocranial ossification while little changes occurred in cranial dermal bones.
{"title":"Paedomorphosis and neurocranial ossification in two Devonian lungfishes","authors":"Marie Boirot, T. Challands, R. Cloutier","doi":"10.4202/app.00841.2020","DOIUrl":"https://doi.org/10.4202/app.00841.2020","url":null,"abstract":"Lungfishes are one of the few early vertebrate clades with a rich 410-million-years-old fossil record. Lungfishes are characterized by a low evolutionary rate assumed to be associated with paedomorphosis since the Late Devonian. Lungfish paedomorphic trends include a reduction of the number of median fins, reduction of the number of cranial dermal bones, and reduction of the degree of neurocranial ossification. This neurocranial trait has evolved from heavily ossified in Devonian species to completely cartilaginous in post-Devonian species. Neurocranial conditions among derived Devonian lungfishes are needed to have a better understanding of paedomorphosis as a driving force during lungfish evolution. The neurocrania of two Devonian species, Scaumenacia curta (middle Frasnian, Escuminac Formation, eastern Canada) and Pentlandia macroptera (Givetian, Orcadian Basin, Scotland), have been micro-CT-scanned. These species were assumed to have a cartilaginous neurocranium like other “phaneropleurids” and “fleurantids”. Juvenile (or sub-adult) and adult specimens of S. curta possess cartilaginous neurocrania, whereas P. macroptera is now recognized to have a poorly ossified neurocranium. Pyrite filled neurocranial cavities preserving some endocranial structures (e.g., olfactory bulbs, semicircular canals) allow us to code for phylogenetic endocranial characters in S. curta. This unique mode of preservation suggests that occasionally pyrite is a preservative rather than a destructive diagenetic agent. In the evolutionary gap between Pentlandia and Scaumenacia, paedomorphosis had already resulted in reduction of neurocranial ossification while little changes occurred in cranial dermal bones.","PeriodicalId":50887,"journal":{"name":"Acta Palaeontologica Polonica","volume":"1 1","pages":""},"PeriodicalIF":1.8,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70478855","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"A new euarthropod from the Cambrian Stage 4 Guanshan Biota of South China","authors":"De-guang Jiao, Kun-Sheng Du","doi":"10.4202/app.00937.2021","DOIUrl":"https://doi.org/10.4202/app.00937.2021","url":null,"abstract":",","PeriodicalId":50887,"journal":{"name":"Acta Palaeontologica Polonica","volume":"1 1","pages":""},"PeriodicalIF":1.8,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70479639","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Allometric growth in the frontals of the Mongolian Dinosaur Tarbosaurus bataar (Theropoda, Tyrannosauridae)","authors":"Chan-gyu Yun, Galadriel Freeman Peters, P. Currie","doi":"10.4202/app.00947.2021","DOIUrl":"https://doi.org/10.4202/app.00947.2021","url":null,"abstract":"","PeriodicalId":50887,"journal":{"name":"Acta Palaeontologica Polonica","volume":"1 1","pages":""},"PeriodicalIF":1.8,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70479914","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
This article contains a description of Old Polish series functioning as subjects in sentences, e.g A tako sta-ła jest pod krzyżem matka Jezukrystowa, Maryja magdalena i święty Jan Ewanjelista. In terms of structure, semantic and grammatical features of their elements, as well as types of compound indicators, they resem-ble typical three-argument series (child and mother), however, they differ in the number of noun elements, which usually range from three to seven. Two types of lists are distinguished: homogenous, are organized around a single type of linking element or its equivalent in the form of a delimitation pause (e.g., aby mię od ciebie ani śmierć, ani żywot, ani żadna szczęsność od ciebie oddaliła), and heterogeneous, which may be linked more loosely or more closely (e.g., Gdyby raćce z przysiężniki i z pospólstwem uczynili wielkierz). List syntax was also described; very rarely it was exclusively ad sensum, more frequently, exclusively ad formam or in some cases, ad formam/ad sensum. The lists extracted here resemble modern serial subjects in terms of structure and syntax and, according to quantitative analyses, have a similar frequency in the oldest known Polish sentences.
这篇文章包含了在句子中作为主语的古波兰语系列的描述，例如a tako sta-ła jest pod krzyżem matka Jezukrystowa, Maryja magdalena i święty Jan Ewanjelista。从构成要素的结构、语义和语法特征，以及复合指示符的类型来看，它们都类似于典型的三参数系列(child and mother)，但它们在名词构成要素的数量上有所不同，通常为3 - 7个。区分了两种类型的列表:同质的，围绕单一类型的链接元素或其等同的形式，以边界暂停的形式组织(例如，aby miood ciebie ani śmierć， ani żywot, ani żadna szczęsność od ciebie oddaliła)和异构的，可能更松散或更紧密地链接(例如，Gdyby raćce z przysiężniki iz pospólstwem uczynili wielkierz)。还描述了列表语法;很少是完全AD sensum，更常见的是完全AD formam，或者在某些情况下，AD formam/ AD sensum。这里提取的列表在结构和句法方面类似于现代的系列主语，根据定量分析，在已知的最古老的波兰句子中有相似的频率。
{"title":"Szeregi wieloczłonowe w funkcji podmiotu w staropolszczyźnie","authors":"Piotr Zbróg","doi":"10.17651/polon.42.2","DOIUrl":"https://doi.org/10.17651/polon.42.2","url":null,"abstract":"This article contains a description of Old Polish series functioning as subjects in sentences, e.g A tako sta-ła jest pod krzyżem matka Jezukrystowa, Maryja magdalena i święty Jan Ewanjelista. In terms of structure, semantic and grammatical features of their elements, as well as types of compound indicators, they resem-ble typical three-argument series (child and mother), however, they differ in the number of noun elements, which usually range from three to seven. Two types of lists are distinguished: homogenous, are organized around a single type of linking element or its equivalent in the form of a delimitation pause (e.g., aby mię od ciebie ani śmierć, ani żywot, ani żadna szczęsność od ciebie oddaliła), and heterogeneous, which may be linked more loosely or more closely (e.g., Gdyby raćce z przysiężniki i z pospólstwem uczynili wielkierz). List syntax was also described; very rarely it was exclusively ad sensum, more frequently, exclusively ad formam or in some cases, ad formam/ad sensum. The lists extracted here resemble modern serial subjects in terms of structure and syntax and, according to quantitative analyses, have a similar frequency in the oldest known Polish sentences.","PeriodicalId":50887,"journal":{"name":"Acta Palaeontologica Polonica","volume":"19 1","pages":""},"PeriodicalIF":1.8,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75926755","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The current knowledge on the Paleocene Odonata is rather limited despite the fact that it is a crucial period for the history of this order. An overview of the fossil odonatans from the Paleocene of Menat (France) is provided. We describe the anisopteran Macrogomphus menatensis sp. nov., first fossil representative of the family Epigomphidae, together with two zygopteran, viz. the dysagrionid Menatagrion hervetae gen. et sp. nov., and the new family Menatlestidae fam. nov., with its type species Menatlestes palaeocenicus gen. et sp. nov. The genus Menatagrion gen. nov. is the first Paleocene record of the Dysagrionidae, otherwise known by a putative Cretaceous genus and several Eocene to Miocene genera. Menatlestes gen. nov., putatively attributed to the stem-group of the Lestinoidea (Megalestidae and Lestidae), would correspond to the oldest record of this clade. With these three new taxa, and the previously described Thanetophilosina menatensis , Valerea multicellulata , “ Lestes ” zalesskyi , and an Aeshna species indet., the total number of Odonata from Menat goes up to seven species in total; two Anisoptera and five Zygoptera. Furthermore, we propose new evidences showing that the head characters defining the putative suborder Cephalozygoptera are due to deformations, very frequent among the fossil Odonatoptera. We treat the Cephalozygoptera as a junior synonym of Zygoptera.
尽管古新世是该目历史上的一个关键时期，但目前对它的了解相当有限。本文概述了法国Menat地区古新世的齿龙类化石。我们描述了异翅目巨爪龙menatensis sp. nov.，这是巨爪龙科的第一个化石代表，以及两个双翅目，即失翅目Menatagrion hervetae gen. et sp. nov.和新发现的menatestidae fam。Menatagrion gen. 11 .是古新世首次记录的Dysagrionidae科，其他已知的是一个假定的白垩纪属和几个始新世至中新世属。Menatlestes gen. nov.被推定为lestino总科(Megalestidae和leestidae)的茎群，与该分支最古老的记录相对应。利用这三个新分类群，以及先前描述的Thanetophilosina menatensis, Valerea multicululata，“Lestes”zalesskyi和一个Aeshna种索引。， Menat的蜥目动物总数达7种;异翅目2只，夜翅目5只。此外，我们还提出了新的证据，表明定义头颌翅目亚目的头部特征是由于变形造成的，这种变形在化石中非常常见。我们把头颧翅目作为颧翅目的初级同义词。
{"title":"The odonatan insects from the Paleocene of Menat, central France","authors":"A. Nel, C. Jouault","doi":"10.4202/app.00960.2021","DOIUrl":"https://doi.org/10.4202/app.00960.2021","url":null,"abstract":"The current knowledge on the Paleocene Odonata is rather limited despite the fact that it is a crucial period for the history of this order. An overview of the fossil odonatans from the Paleocene of Menat (France) is provided. We describe the anisopteran Macrogomphus menatensis sp. nov., first fossil representative of the family Epigomphidae, together with two zygopteran, viz. the dysagrionid Menatagrion hervetae gen. et sp. nov., and the new family Menatlestidae fam. nov., with its type species Menatlestes palaeocenicus gen. et sp. nov. The genus Menatagrion gen. nov. is the first Paleocene record of the Dysagrionidae, otherwise known by a putative Cretaceous genus and several Eocene to Miocene genera. Menatlestes gen. nov., putatively attributed to the stem-group of the Lestinoidea (Megalestidae and Lestidae), would correspond to the oldest record of this clade. With these three new taxa, and the previously described Thanetophilosina menatensis , Valerea multicellulata , “ Lestes ” zalesskyi , and an Aeshna species indet., the total number of Odonata from Menat goes up to seven species in total; two Anisoptera and five Zygoptera. Furthermore, we propose new evidences showing that the head characters defining the putative suborder Cephalozygoptera are due to deformations, very frequent among the fossil Odonatoptera. We treat the Cephalozygoptera as a junior synonym of Zygoptera.","PeriodicalId":50887,"journal":{"name":"Acta Palaeontologica Polonica","volume":"1 1","pages":""},"PeriodicalIF":1.8,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70479672","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Qingqin Tang, Yajuan Zheng, S. Qin, Yin-chu Wang, Xiaoguang Yang, Xing Wang, Jie Sun, K. Uesugi, T. Komiya, Jian Han
The Kuanchuanpu biota (ca. 535 Ma) from the basal Cambrian in South China yields various phosphatized, three-dimensionally preserved microscopic fossils, such as animal embryos, cyanobacteria, and algae. This provides an exceptional window for investigating the rapid divergent evolution of animal phyla in the early Cambrian ocean. However, the fossil eukaryotic algae are poorly documented and are not properly incorporated into the conceptual food web of the Cambrian ocean ecosystem. In this study, we report a new taxon of calathiform alga, Calathophycus irregulatus Tang gen. et sp. nov., and an indeterminate alga, from the Kuanchuanpu biota. Calathophycus irregulatus can be distinguished from other reported phosphatized multicellular algal fossils from the Kuanchuanpu biota and the Ediacaran Weng’an biota (Guizhou Province, China), based on the external morphology and features of cell clump aggregation. The observation of C. irregulatus and the indeterminate alga indicates a certain diversity of algae at the beginning of the Cambrian. Concerning the regularly or irregularly shaped multicellular algal fossils from the Kuanchuanpu Formation, co-occurring spherical fossils, previously interpreted as “cleavage stage” of animal embryos, should be reconsidered in affinity.
华南底寒武纪宽川铺生物群(约535 Ma)发现了各种磷化的、三维保存的微观化石，如动物胚胎、蓝藻和藻类。这为研究早寒武纪海洋动物门的快速分化进化提供了一个特殊的窗口。然而，真核藻类化石文献很少，并没有被适当地纳入寒武纪海洋生态系统的概念食物网。本文报道了宽川铺生物群中一种新的Calathophycus irregulatus Tang gen. et sp. nov.和一种不确定的藻类。Calathophycus irregulatus可以根据细胞团聚集的外部形态和特征与其他已报道的来自贵州宽川堡生物群和埃迪卡拉系翁安生物群的磷化多细胞藻类化石区分开来。C. irregulatus和不确定藻的观察表明，寒武纪初期藻类具有一定的多样性。对于宽川铺组不规则或不规则形状的多细胞藻化石，应重新考虑先前被解释为动物胚胎“卵裂期”的共生球形化石的亲和性。
{"title":"New materials of multicellular algae from the earliest Cambrian Kuanchuanpu biota in South China","authors":"Qingqin Tang, Yajuan Zheng, S. Qin, Yin-chu Wang, Xiaoguang Yang, Xing Wang, Jie Sun, K. Uesugi, T. Komiya, Jian Han","doi":"10.4202/app.00946.2021","DOIUrl":"https://doi.org/10.4202/app.00946.2021","url":null,"abstract":"The Kuanchuanpu biota (ca. 535 Ma) from the basal Cambrian in South China yields various phosphatized, three-dimensionally preserved microscopic fossils, such as animal embryos, cyanobacteria, and algae. This provides an exceptional window for investigating the rapid divergent evolution of animal phyla in the early Cambrian ocean. However, the fossil eukaryotic algae are poorly documented and are not properly incorporated into the conceptual food web of the Cambrian ocean ecosystem. In this study, we report a new taxon of calathiform alga, Calathophycus irregulatus Tang gen. et sp. nov., and an indeterminate alga, from the Kuanchuanpu biota. Calathophycus irregulatus can be distinguished from other reported phosphatized multicellular algal fossils from the Kuanchuanpu biota and the Ediacaran Weng’an biota (Guizhou Province, China), based on the external morphology and features of cell clump aggregation. The observation of C. irregulatus and the indeterminate alga indicates a certain diversity of algae at the beginning of the Cambrian. Concerning the regularly or irregularly shaped multicellular algal fossils from the Kuanchuanpu Formation, co-occurring spherical fossils, previously interpreted as “cleavage stage” of animal embryos, should be reconsidered in affinity.","PeriodicalId":50887,"journal":{"name":"Acta Palaeontologica Polonica","volume":"27 1","pages":""},"PeriodicalIF":1.8,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70479901","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Jiayuan Huang, Kun Liang, Yue Wang, S. Kershaw, J. Jeon, Yue Li, Wenkun Qie
Stromatoporoids from a Middle Devonian reef in South China and their palaeoecological implication. Acta Palaeontologica Polonica 67 (X): xxx–xxx. Stromatoporoids are the major constructors of a Givetian (Middle Devonian) fossil reef in shallow marine facies, in the Jiwozhai Member of the Dushan Formation, at Dahekou, near Dushan, Guizhou Province, South China. Stromatoporoids, together with other reef building and dwelling components (rugose corals, tabulates, chaetetids and others), form a high diversity community, making the Jiwozhai reef a palaeobiodiversity hotspot. In this study 11 species belonging to nine genera and four orders are identified, including Gerronostromaria grossum (Clathrodictyida), Pseudotrupetostroma porosum , and Salairella buecheliensis (Stromatoporida), Clathrocoilona spissa , Stictostroma sag inatum , and Synthetostroma actinostromoides (Stromatoporellida) and ? Habrostroma laminosum , Parallelopora sp., Stachyodes costulata , Stachyodes fasciculata and Stachyodes sp. (Syringostromatida). Among them, Clathrocoilona spissa and Gerronostromaria grossum are the most abundant stromatoporoid taxa. Stromatoporoid growth form, size, substrate and growth interruption are considered to be key autecological parameters to evaluate their growth behaviour and contribution in reef formation. Skeletons of laminar Clathrocoilona spissa are commonly smaller (up to 40 mm in basal dimension and less than 2 mm in thickness) than other stromatoporoid taxa and frequently encrusted on other organisms. In contrast, Gerronostromaria grossum dominates the assemblage, with its larger laminar growth form (up to 500 mm in basal dimension and 40 mm in thickness) expanding both on bioclastic and clay-rich micritic substrate and shows repeated growth interruptions, altogether evidence that this taxon was resilient to environmental pressure and may have pioneered the reef development. The variation of growth preference among stromatoporoid taxa therefore indicates a different growth strategy of each stromatoporoid in this reef environment.
{"title":"Stromatoporoids from a Middle Devonian reef of South China and their palaeoecological implication","authors":"Jiayuan Huang, Kun Liang, Yue Wang, S. Kershaw, J. Jeon, Yue Li, Wenkun Qie","doi":"10.4202/app.00954.2021","DOIUrl":"https://doi.org/10.4202/app.00954.2021","url":null,"abstract":"Stromatoporoids from a Middle Devonian reef in South China and their palaeoecological implication. Acta Palaeontologica Polonica 67 (X): xxx–xxx. Stromatoporoids are the major constructors of a Givetian (Middle Devonian) fossil reef in shallow marine facies, in the Jiwozhai Member of the Dushan Formation, at Dahekou, near Dushan, Guizhou Province, South China. Stromatoporoids, together with other reef building and dwelling components (rugose corals, tabulates, chaetetids and others), form a high diversity community, making the Jiwozhai reef a palaeobiodiversity hotspot. In this study 11 species belonging to nine genera and four orders are identified, including Gerronostromaria grossum (Clathrodictyida), Pseudotrupetostroma porosum , and Salairella buecheliensis (Stromatoporida), Clathrocoilona spissa , Stictostroma sag inatum , and Synthetostroma actinostromoides (Stromatoporellida) and ? Habrostroma laminosum , Parallelopora sp., Stachyodes costulata , Stachyodes fasciculata and Stachyodes sp. (Syringostromatida). Among them, Clathrocoilona spissa and Gerronostromaria grossum are the most abundant stromatoporoid taxa. Stromatoporoid growth form, size, substrate and growth interruption are considered to be key autecological parameters to evaluate their growth behaviour and contribution in reef formation. Skeletons of laminar Clathrocoilona spissa are commonly smaller (up to 40 mm in basal dimension and less than 2 mm in thickness) than other stromatoporoid taxa and frequently encrusted on other organisms. In contrast, Gerronostromaria grossum dominates the assemblage, with its larger laminar growth form (up to 500 mm in basal dimension and 40 mm in thickness) expanding both on bioclastic and clay-rich micritic substrate and shows repeated growth interruptions, altogether evidence that this taxon was resilient to environmental pressure and may have pioneered the reef development. The variation of growth preference among stromatoporoid taxa therefore indicates a different growth strategy of each stromatoporoid in this reef environment.","PeriodicalId":50887,"journal":{"name":"Acta Palaeontologica Polonica","volume":"1 1","pages":""},"PeriodicalIF":1.8,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70480065","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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