A new genus and species of ?parthenogenic anostracan (Pancrustacea, Branchiopoda, ?Thamnocephalidae) from the Lower Cretaceous Koonwarra Fossil Bed in Australia

Houte, Emma Van; Hegna, Thomas A.; Butler, Aodhán D.

doi:10.1080/03115518.2022.2048267

Cited by 4 publications

(2 citation statements)

References 52 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The morphological architecture of Anostraca species is conservative, with a usual body length ranging from 6 to 25 mm, having 20 body segments, lacking a carapace, and bearing 11–19 pairs of leaf-like phyllopodia and stalked compound eyes [ 5 ]. Their fossil record dates back to at least the lower Cretaceous [ 6 , 7 ]. Anostraca are traditionally classified into two suborders: Artemiina (brine shrimp) and Anostricina (fairy shrimp) [ 1 ].…”

Section: Introductionmentioning

confidence: 99%

Comparative Mitogenomic Analyses and New Insights into the Phylogeny of Thamnocephalidae (Branchiopoda: Anostraca)

Sun

Cheng

2022

Genes

View full text Add to dashboard Cite

Thamnocephalidae, a family of Anostraca which is widely distributed on all continents of the world except Antarctica, currently consists of six genera and approximately 63 recognized species. The relationships among genera in Thamnocephalidae and the monophyly of Thamnocephalidae, determined using morphological characteristics or gene markers, remain controversial. In order to address the relationships within Thamnocephalidae, we sequenced Branchinella kugenumaensis mitogenomes and conducted a comparative analysis to reveal the divergence across mitogenomes of B. kugenumaensis. Using newly obtained mitogenomes together with available Anostracan genomic sequences, we present the most complete phylogenomic understanding of Anostraca to date. We observed high divergence across mitogenomes of B. kugenumaensis. Meanwhile, phylogenetic analyses based on both amino acids and nucleotides of the protein-coding genes (PCG) provide significant support for a non-monophyletic Thamnocephalidae within Anostraca, with Asian Branchinella more closely related to Streptocephalidae than Australian Branchinella. The phylogenetic relationships within Anostraca were recovered as follows: Branchinectidae + Chirocephalidae as the basal group of Anostraca and halophilic Artemiidae as a sister to the clade Thamnocephalidae + Streptocephalidae. Both Bayesian inference (BI)- and maximum likelihood (ML)-based analyses produced identical topologies.

show abstract

Section: Introductionmentioning

confidence: 99%

Comparative Mitogenomic Analyses and New Insights into the Phylogeny of Thamnocephalidae (Branchiopoda: Anostraca)

Sun

Cheng

2022

Genes

View full text Add to dashboard Cite

show abstract

“…Rolfe [ 4 ] proposed an alternative interpretation as a possible juvenile of the arthropleurid myriapod Bundenbachiellus minor Broili, 1930, a suggestion that has not been followed up by later work on Bundenbachiellus . The most recent works on fossil anostracans do not recognize Gilsonicaris as an anostracan, because it does not possess any anostracan synapomorphies beyond a possibly homonymous trunk [ 5 , 6 ]. It has even been postulated that it is perhaps not even an arthropod but part of an asteroid echinoderm arm (see [ 5 ]).…”

Section: Introductionmentioning

confidence: 99%

Gilsonicaris from the Lower Devonian Hunsrück slate is a eunicidan annelid and not the oldest crown anostracan crustacean

Gueriau,

Parry,

Rabet

2023

Biol. Lett.

View full text Add to dashboard Cite

The Lower Devonian (Lower Emsian, −400 Myr) roof slates of the Hunsrück in southeastern Germany have delivered a highly diverse and exceptionally preserved marine fauna that provides a unique snapshot into the anatomy and ecology of a wide range of Palaeozoic animals. Several of the described taxa, however, remain enigmatic in their affinity, at least until new pyritized features hidden under the surface of the slate are revealed using X-ray radiography or micro-computed tomography (µCT). Here, we redescribe such an enigmatic fossil, the putative anostracan crustacean Gilsonicaris rhenanus Van Straelen, 1943. Using µCT scanning, we unveil unprecedented details of its anatomy, including a ventral oral opening and four pairs of recalcitrant jaw elements. These jaws are morphologically consistent with the scolecodonts of eunicidan polychaetes, which along with the gross anatomy of the body and head unambiguously identifies G. rhenanus as a polychaete rather than an arthropod. While this discovery firmly discards the Early Devonian record of crown anostracans in the fossil record, it adds a new record of eunicidan soft tissues, which are surprisingly rare considering the abundant microfossil record of scolecodonts.

show abstract

The end of the ‘living fossil’ tale? A new look at Triassic specimens assigned to the tadpole shrimp Triops cancriformis (Notostraca) and associated phyllopods from the Vosges region (eastern France)

Geyer,

Hegna,

Kelber

2024

Papers in Palaeontology

View full text Add to dashboard Cite

Notostracan branchiopods reported from the Lower Triassic Voltzia Sandstone Lagerstätte in northeastern France have previously been assigned to Triops cancriformis, making this species the longest persisting animal in earth history. Careful restudy of the splendidly preserved material indicates that the species can be well characterized but represents a notostracan genus and species that cannot be assigned to the Triopsidae. This undermines the concept of its being a ‘living fossil’. The name Apudites antiquus, under which the first known specimens were described, is available and appropriate for the species. Some of the specimens of Apudites antiquus offer morphological details of a quality that ranks them among the best‐preserved fossil non‐marine arthropods. The Voltzia Sandstone specimens previously assigned to the extant species T. cancriformis include two additional, peculiar diplostracan branchiopods, Olesenocaris galli gen. et sp. nov. and Grauvogelocaris alsatica gen. et sp. nov., both with unique morphological features that characterize them as representatives of as yet unknown families.

show abstract

A new genus and species of ?parthenogenic anostracan (Pancrustacea, Branchiopoda, ?Thamnocephalidae) from the Lower Cretaceous Koonwarra Fossil Bed in Australia

Cited by 4 publications

References 52 publications

Comparative Mitogenomic Analyses and New Insights into the Phylogeny of Thamnocephalidae (Branchiopoda: Anostraca)

Comparative Mitogenomic Analyses and New Insights into the Phylogeny of Thamnocephalidae (Branchiopoda: Anostraca)

Gilsonicaris from the Lower Devonian Hunsrück slate is a eunicidan annelid and not the oldest crown anostracan crustacean

The end of the ‘living fossil’ tale? A new look at Triassic specimens assigned to the tadpole shrimp Triops cancriformis (Notostraca) and associated phyllopods from the Vosges region (eastern France)

Contact Info

Product

Resources

About