Pub Date : 1997-01-01DOI: 10.1080/03115519708619167
Y. Zhen, R. R. West
A spectacular association between a chaetetid, a stromatoporoid (Salairella sp.), and straight, vertical tubes interpreted to have housed symbiotic worms is reported from the Givetian Burdekin Formation, Burdekin Basin, north Queensland. The final growth surface of Salairella sp. shows skeletal distortion characterised by long, rather continuous coenosteles and coenostroms with upturned edges. This distorted interface was probably the result of spatial competitive interaction between the encrusting chaetetid and the underlying stromatoporoid. Neither sediment infilling, erosion or surface breakage occurs on the final growth surface of the stromatoporoid skeleton. As such, the growth of the Salairella sp. specimen appears to have been supressed by the encrusting chaetetid. Worm tubes are continuous through the distorted interface without interruption. The skeletal association also suggests that the round, straight, vertical tubes had a symbiotic intergrowth relationship initially with the stromatoporoid an...
{"title":"Symbionts in a stromatoporoid-chaetetid association from the Middle Devonian Burdekin Basin, north Queensland","authors":"Y. Zhen, R. R. West","doi":"10.1080/03115519708619167","DOIUrl":"https://doi.org/10.1080/03115519708619167","url":null,"abstract":"A spectacular association between a chaetetid, a stromatoporoid (Salairella sp.), and straight, vertical tubes interpreted to have housed symbiotic worms is reported from the Givetian Burdekin Formation, Burdekin Basin, north Queensland. The final growth surface of Salairella sp. shows skeletal distortion characterised by long, rather continuous coenosteles and coenostroms with upturned edges. This distorted interface was probably the result of spatial competitive interaction between the encrusting chaetetid and the underlying stromatoporoid. Neither sediment infilling, erosion or surface breakage occurs on the final growth surface of the stromatoporoid skeleton. As such, the growth of the Salairella sp. specimen appears to have been supressed by the encrusting chaetetid. Worm tubes are continuous through the distorted interface without interruption. The skeletal association also suggests that the round, straight, vertical tubes had a symbiotic intergrowth relationship initially with the stromatoporoid an...","PeriodicalId":50830,"journal":{"name":"Alcheringa","volume":"21 1","pages":"271-280"},"PeriodicalIF":1.3,"publicationDate":"1997-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/03115519708619167","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"59986826","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1997-01-01DOI: 10.1080/03115519708619172
J. Laurie
Two species of brachiopod are recorded from the Upper Cambrian Chatsworth Limestone of western Queensland. Kozhuchinella, previously only known from supposed Upper Tremadoc rocks of southwest Siberia, is documented for the first time from Australia as Kozhuchinella cf. mariinica Severgina, 1967. This species exhibits digitate ventral and dorsal mantle canal systems, the latter unusual in possessing blind vascula myaria. The musculature and mantle canal systems indicate that the species belongs to the Billingsellidae and not the Plectambonitoidea as originally suggested by Severgina. Also documented is a new genus, Radkeina (type species R. taylori sp. nov.), tentatively assigned to the Family Huenellidae.
{"title":"Silicified Late Cambrian brachiopods from the Georgina Basin, western Queensland","authors":"J. Laurie","doi":"10.1080/03115519708619172","DOIUrl":"https://doi.org/10.1080/03115519708619172","url":null,"abstract":"Two species of brachiopod are recorded from the Upper Cambrian Chatsworth Limestone of western Queensland. Kozhuchinella, previously only known from supposed Upper Tremadoc rocks of southwest Siberia, is documented for the first time from Australia as Kozhuchinella cf. mariinica Severgina, 1967. This species exhibits digitate ventral and dorsal mantle canal systems, the latter unusual in possessing blind vascula myaria. The musculature and mantle canal systems indicate that the species belongs to the Billingsellidae and not the Plectambonitoidea as originally suggested by Severgina. Also documented is a new genus, Radkeina (type species R. taylori sp. nov.), tentatively assigned to the Family Huenellidae.","PeriodicalId":50830,"journal":{"name":"Alcheringa","volume":"21 1","pages":"179-189"},"PeriodicalIF":1.3,"publicationDate":"1997-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/03115519708619172","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"59986919","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1997-01-01DOI: 10.1080/03115519708619174
S. Salisbury, P. Willis
{"title":"A new crocodilylian from the Early Eocene of southeastern Queensland and a preliminary investigation of phylogenetic relationships of crocodyloids. (vol 20, pg 179, 1996)","authors":"S. Salisbury, P. Willis","doi":"10.1080/03115519708619174","DOIUrl":"https://doi.org/10.1080/03115519708619174","url":null,"abstract":"","PeriodicalId":50830,"journal":{"name":"Alcheringa","volume":"21 1","pages":"218-218"},"PeriodicalIF":1.3,"publicationDate":"1997-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/03115519708619174","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"59987559","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1997-01-01DOI: 10.1080/03115519708619182
D. Tilley, Timothy T. Barrows, E. C. Zimmerman
Within the Weipa bauxite deposit of northern Queensland, Australia, are rare ovoid structures averaging 49 × 30 mm in size and of a similar composition to the surrounding bauxite. Comprised of a thin shell with an opening near one end, these structures encase ordinary bauxitic pisolitha and are referred to as ovate compound pisoliths. A small proportion of them are completely hollow and have no apparent opening into their chamber. Similar calcareous structures are found along the west coast of Eyre Peninsula, South Australia. These calcareous structures are interpreted to have been constructed by the larval stage of the weevil Leptopius duponti, for protection during pupation. The calcareous structures have a similar size and shape to bauxitic pisoliths, suggesting that ovate compound pisoliths may have been constructed by a similar organism, possibly belonging to the genus Leptopius.
{"title":"Bauxitic insect pupal cases from northern Australia","authors":"D. Tilley, Timothy T. Barrows, E. C. Zimmerman","doi":"10.1080/03115519708619182","DOIUrl":"https://doi.org/10.1080/03115519708619182","url":null,"abstract":"Within the Weipa bauxite deposit of northern Queensland, Australia, are rare ovoid structures averaging 49 × 30 mm in size and of a similar composition to the surrounding bauxite. Comprised of a thin shell with an opening near one end, these structures encase ordinary bauxitic pisolitha and are referred to as ovate compound pisoliths. A small proportion of them are completely hollow and have no apparent opening into their chamber. Similar calcareous structures are found along the west coast of Eyre Peninsula, South Australia. These calcareous structures are interpreted to have been constructed by the larval stage of the weevil Leptopius duponti, for protection during pupation. The calcareous structures have a similar size and shape to bauxitic pisoliths, suggesting that ovate compound pisoliths may have been constructed by a similar organism, possibly belonging to the genus Leptopius.","PeriodicalId":50830,"journal":{"name":"Alcheringa","volume":"21 1","pages":"157-160"},"PeriodicalIF":1.3,"publicationDate":"1997-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/03115519708619182","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"59987811","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1997-01-01DOI: 10.1080/03115519708619171
D. McIlroy, G. Heys
The Cambrian trace fossil Plagiogmus is the floor of a backfilled burrow which is common in the deltaic sediments of the Arumbera Sandstone in central Australia. The Plagiogmus forming organism/s was/were connected to the surface by a siphon that formed a longitudinal furrow. Collapse associated with the movement of the siphon through the sediment may have produced a variety of trace fossil morphologies similar to the ichnogenera Gordia, Cochlichnus and Taphrhelminthopsis. Other parts of the Plagiogmus burrow may be compared with Olivellites, Aulichnites, Laminites, Climactichnites and Psammichnites ispp. The distinctive transverse bars of the Plagiogmus structure are interpreted as being produced by a posterior sucker used by the animal during locomotion. It is interpreted that the burrow fill was composed solely of feeding wastes and not the spoils of tunnelling. The laminae within the backfill are not related to the transverse bars. Bilobed burrows overlying the Plagiogmus component are related to the ...
{"title":"Palaeobiological significance of Plagiogmus arcuatus from the lower Cambrian of central Australia","authors":"D. McIlroy, G. Heys","doi":"10.1080/03115519708619171","DOIUrl":"https://doi.org/10.1080/03115519708619171","url":null,"abstract":"The Cambrian trace fossil Plagiogmus is the floor of a backfilled burrow which is common in the deltaic sediments of the Arumbera Sandstone in central Australia. The Plagiogmus forming organism/s was/were connected to the surface by a siphon that formed a longitudinal furrow. Collapse associated with the movement of the siphon through the sediment may have produced a variety of trace fossil morphologies similar to the ichnogenera Gordia, Cochlichnus and Taphrhelminthopsis. Other parts of the Plagiogmus burrow may be compared with Olivellites, Aulichnites, Laminites, Climactichnites and Psammichnites ispp. The distinctive transverse bars of the Plagiogmus structure are interpreted as being produced by a posterior sucker used by the animal during locomotion. It is interpreted that the burrow fill was composed solely of feeding wastes and not the spoils of tunnelling. The laminae within the backfill are not related to the transverse bars. Bilobed burrows overlying the Plagiogmus component are related to the ...","PeriodicalId":50830,"journal":{"name":"Alcheringa","volume":"21 1","pages":"161-178"},"PeriodicalIF":1.3,"publicationDate":"1997-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/03115519708619171","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"59986803","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1997-01-01DOI: 10.1080/03115519708619173
Z. Johanson
The Hunter Siltstone near Grenfell, New South Wales, contains a rich Upper Devonian fish fauna including the sinolepid Grenfellaspis and the new antiarchs Bothriolepis grenfellensis sp. nov. and Remigolepis redcliffensis sp. nov. Bothriolepis grenfellensis sp. nov. is the first bothriolepid species described from N.S.W., and R. redcliffensis sp. nov. is the first species of Remigolepis described from Australia. Traditionally, the Hunter Siltstone was considered to be uppermost Famennian or earliest Carboniferous in age based on the presence of Grenfellaspis, and the related taxon Sinolepis, which is known from the Wutung and Sanmentan formations of southeastern China. However, available data indicates the Hunter Siltstone may be early Famennian in age. Ongoing work suggests that all Famennian Bothriolepis from N.S.W., including B. grenfellensis, possess a trifid preorbital recess, but differ in other aspects of headshield morphology. In North China, the Famennian Zhongning Formation contains six species o...
{"title":"New antiarchs (Placodermi) from the Hunter Siltstone (Famennian) near Grenfell, N.S.W.","authors":"Z. Johanson","doi":"10.1080/03115519708619173","DOIUrl":"https://doi.org/10.1080/03115519708619173","url":null,"abstract":"The Hunter Siltstone near Grenfell, New South Wales, contains a rich Upper Devonian fish fauna including the sinolepid Grenfellaspis and the new antiarchs Bothriolepis grenfellensis sp. nov. and Remigolepis redcliffensis sp. nov. Bothriolepis grenfellensis sp. nov. is the first bothriolepid species described from N.S.W., and R. redcliffensis sp. nov. is the first species of Remigolepis described from Australia. Traditionally, the Hunter Siltstone was considered to be uppermost Famennian or earliest Carboniferous in age based on the presence of Grenfellaspis, and the related taxon Sinolepis, which is known from the Wutung and Sanmentan formations of southeastern China. However, available data indicates the Hunter Siltstone may be early Famennian in age. Ongoing work suggests that all Famennian Bothriolepis from N.S.W., including B. grenfellensis, possess a trifid preorbital recess, but differ in other aspects of headshield morphology. In North China, the Famennian Zhongning Formation contains six species o...","PeriodicalId":50830,"journal":{"name":"Alcheringa","volume":"21 1","pages":"191-217"},"PeriodicalIF":1.3,"publicationDate":"1997-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/03115519708619173","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"59987004","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1997-01-01DOI: 10.1080/03115519708619181
I. Soulié-Märsche, P. Gemayel, Y. Chaimanee, V. Suteethorn, J. Jaeger, S. Ducrocq
Charophyte gyrogonites from two Miocene sites in northern Thailand are studied and compared for population variation. Morphometrical differences between the two populations, determined as Nitellopsis merianii and N. meriani globula, correspond to variation at the interpopulation level and do not justify the distinction of two separate species as made by previous authors. The first exhaustive synonymy for both taxa is listed. Morphological differences can be attributed to environmental differences as reflected by distinct lithologies of the samples concerned. The eurasian character of N. merianii is underlined through its biogeographical distribution in China. The flora is in accordance with the early Middle Miocene age (16–14 My) previously published for vertebrate faunas from the same sites.
{"title":"Nitellopsis (Charophyta) from the Miocene of northern Thailand","authors":"I. Soulié-Märsche, P. Gemayel, Y. Chaimanee, V. Suteethorn, J. Jaeger, S. Ducrocq","doi":"10.1080/03115519708619181","DOIUrl":"https://doi.org/10.1080/03115519708619181","url":null,"abstract":"Charophyte gyrogonites from two Miocene sites in northern Thailand are studied and compared for population variation. Morphometrical differences between the two populations, determined as Nitellopsis merianii and N. meriani globula, correspond to variation at the interpopulation level and do not justify the distinction of two separate species as made by previous authors. The first exhaustive synonymy for both taxa is listed. Morphological differences can be attributed to environmental differences as reflected by distinct lithologies of the samples concerned. The eurasian character of N. merianii is underlined through its biogeographical distribution in China. The flora is in accordance with the early Middle Miocene age (16–14 My) previously published for vertebrate faunas from the same sites.","PeriodicalId":50830,"journal":{"name":"Alcheringa","volume":"21 1","pages":"141-156"},"PeriodicalIF":1.3,"publicationDate":"1997-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/03115519708619181","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"59987615","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1997-01-01DOI: 10.1080/03115519708619177
M. Ruta
Re-examination of the type material, and study of new specimens of the Upper Silurian mitrate Victoriacystis wilkinsi Gill & Caster from the Heathcote area of Victoria, Australia, reveal additional details of its anatomy. Mitrates from the Lower Silurian of Hawthorn and the Lower Devonian of Kinglake West (Victoria, Australia) are assigned to V. wilkinsi. New morphological features of Victoriacystis are: a sculptured median upper lip plate; five transverse rows of ventral plates; a complex ornament on the internal surface of the anteriormost ventral plates; a flexible articulation between dorsal and ventral fore-tail plates; and the presence of knobs on the ventral hind-tail plates. Victoriacystis was probably a semi-infaunal animal which moved rearward within the sediment pulled by its tail. Yawing was reduced by the deep lateral head walls. The fore-tail could be flexed laterally to a large extent, whereas the hind-tail could proably also act as a lever. Spines might have helped the animal to rest on se...
{"title":"Redescription of the Australian mitrate Victoriacystis with comments on its functional morphology","authors":"M. Ruta","doi":"10.1080/03115519708619177","DOIUrl":"https://doi.org/10.1080/03115519708619177","url":null,"abstract":"Re-examination of the type material, and study of new specimens of the Upper Silurian mitrate Victoriacystis wilkinsi Gill & Caster from the Heathcote area of Victoria, Australia, reveal additional details of its anatomy. Mitrates from the Lower Silurian of Hawthorn and the Lower Devonian of Kinglake West (Victoria, Australia) are assigned to V. wilkinsi. New morphological features of Victoriacystis are: a sculptured median upper lip plate; five transverse rows of ventral plates; a complex ornament on the internal surface of the anteriormost ventral plates; a flexible articulation between dorsal and ventral fore-tail plates; and the presence of knobs on the ventral hind-tail plates. Victoriacystis was probably a semi-infaunal animal which moved rearward within the sediment pulled by its tail. Yawing was reduced by the deep lateral head walls. The fore-tail could be flexed laterally to a large extent, whereas the hind-tail could proably also act as a lever. Spines might have helped the animal to rest on se...","PeriodicalId":50830,"journal":{"name":"Alcheringa","volume":"21 1","pages":"81-101"},"PeriodicalIF":1.3,"publicationDate":"1997-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/03115519708619177","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"59987658","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1997-01-01DOI: 10.1080/03115519708619184
Anthony Tarsilli, M. Warne
Well preserved calcareous microfossils, such as ostracods, can be extracted from strongly lithified Palaeozoic limestones of the Lachlan Fold Belt using highly concentrated acetic acid (95%) with minimal dissociation. This technique differs from the more dilute acetic acid or formic acid methods which are commonly used during the extraction of phosphatic microfossils, such as conodonts, and which destroy many calcitic specimens. Correlations made between representative microfossil assemblages and host rock thin sections expand knowledge of palaeoenvironmental parameters attributed to microfacies.
{"title":"An improved technique for extracting calcareous microfossils from Palaeozoic limestones","authors":"Anthony Tarsilli, M. Warne","doi":"10.1080/03115519708619184","DOIUrl":"https://doi.org/10.1080/03115519708619184","url":null,"abstract":"Well preserved calcareous microfossils, such as ostracods, can be extracted from strongly lithified Palaeozoic limestones of the Lachlan Fold Belt using highly concentrated acetic acid (95%) with minimal dissociation. This technique differs from the more dilute acetic acid or formic acid methods which are commonly used during the extraction of phosphatic microfossils, such as conodonts, and which destroy many calcitic specimens. Correlations made between representative microfossil assemblages and host rock thin sections expand knowledge of palaeoenvironmental parameters attributed to microfacies.","PeriodicalId":50830,"journal":{"name":"Alcheringa","volume":"21 1","pages":"57-64"},"PeriodicalIF":1.3,"publicationDate":"1997-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/03115519708619184","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"59988143","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1996-01-01DOI: 10.1080/03115519608619471
L. Ramsköld, G. Edgecombe
New interpretations are available from recently published appendages of Eoredlichia intermedia (Early Cambrian Chengjiang fauna), the most primitive trilobite for which appendages are known. The basis (formerly identified as the coxa) is preserved in one
{"title":"Trilobite appendage structure — Eoredlichia reconsidered","authors":"L. Ramsköld, G. Edgecombe","doi":"10.1080/03115519608619471","DOIUrl":"https://doi.org/10.1080/03115519608619471","url":null,"abstract":"New interpretations are available from recently published appendages of Eoredlichia intermedia (Early Cambrian Chengjiang fauna), the most primitive trilobite for which appendages are known. The basis (formerly identified as the coxa) is preserved in one","PeriodicalId":50830,"journal":{"name":"Alcheringa","volume":"20 1","pages":"269-276"},"PeriodicalIF":1.3,"publicationDate":"1996-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/03115519608619471","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"59986689","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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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