Remains of the alimentary tract in the Late Ordovician trilobite Dalmanitina (Prague Basin, Barrandian area, Czech Republic)

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985831%3A_____%2F24%3A00583081" target="_blank" >RIV/67985831:_____/24:00583081 - isvavai.cz</a>

Alternative codes found

RIV/00216208:11310/24:10492188

Result on the web

<a href="https://riviste.unimi.it/index.php/RIPS/article/view/20845/20128" target="_blank" >https://riviste.unimi.it/index.php/RIPS/article/view/20845/20128</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.54103/2039-4942/20845" target="_blank" >10.54103/2039-4942/20845</a>

Result language

angličtina

Original language name

Remains of the alimentary tract in the Late Ordovician trilobite Dalmanitina (Prague Basin, Barrandian area, Czech Republic)

Original language description

Preservation of digestive structures in trilobites is generally rare, remains of the alimentary tract have been documented in about eighty of more than twenty thousand described species. Several tens of specimens belonging to five Cambrian and nine Ordovician species from the Barrandian area, Czech Republic, have markedly contributed to the knowledge of the trilobite digestive system. Here, we describe seven exceptionally preserved late holaspid trilobite specimens of species of the genus Dalmanitina collected from Upper Ordovician strata of the Barrandian area. All studied specimens are preserved as internal moulds and exhibit a narrow strip-like structure that runs sagitally or sub-sagitally under the axial lobe of the thoracopygon. These strip-like structures are markedly different from scavenger burrows and are interpreted as remains of the alimentary canal. A slightly expanded anterior-most part of the digestive system is preserved in the cephalic shield of six specimens and is interpreted as a remainder of the anterior midgut. A dark area is seen in the glabellar lobes of three specimens. These dark areas do not represent pyrite concentrations in the hypostome–glabellar cavity, because they contain only small amounts of Fe and S. These areas are interpreted as the remainder of cephalic digestive midgut diverticula, or the “perigastric organ”. Quantitative chemical analyses show that in species of Dalmanitina the digestive system is preserved as dark matter containing partly digested food particles and most probably also a higher amount of clay minerals. The described specimens constitute the first well-documented example of digestive structures in the subfamily Dalmanitininae.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

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OECD FORD branch

10506 - Paleontology

Project

—

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2024

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Rivista Italiana di Paleontologia e Stratigrafia

ISSN

0035-6883

e-ISSN

2039-4942

Volume of the periodical

130

Issue of the periodical within the volume

1

Country of publishing house

IT - ITALY

Number of pages

20

Pages from-to

47-65

UT code for WoS article

001194970300008

EID of the result in the Scopus database

2-s2.0-85193210479