Ralf Janssen
Forskare vid Institutionen för geovetenskaper; Paleobiologi
- E-post:
- ralf.janssen@geo.uu.se
- Besöksadress:
- Geocentrum, Villavägen 16
752 36 Uppsala - Postadress:
- Villavägen 16
752 36 UPPSALA
Ladda ned kontaktuppgifter för Ralf Janssen vid Institutionen för geovetenskaper; Paleobiologi

Publikationer
Senaste publikationer
Ingår i DISCOVER DEVELOPMENTAL BIOLOGY, 2025
- DOI för Early expression of chelicerate hedgehog orthologs and its bearing on the homology of arthropod head segments
- Ladda ner fulltext (pdf) av Early expression of chelicerate hedgehog orthologs and its bearing on the homology of arthropod head segments
Single-cell RNA sequencing of mid-to-late stage spider embryos: new insights into spider development
Ingår i BMC Genomics, 2024
- DOI för Single-cell RNA sequencing of mid-to-late stage spider embryos: new insights into spider development
- Ladda ner fulltext (pdf) av Single-cell RNA sequencing of mid-to-late stage spider embryos: new insights into spider development
Hox genes in spiders: Their significance for development and evolution
Ingår i Seminars in Cell and Developmental Biology, s. 24-34, 2024
Developmental and genomic insight into the origin of the tardigrade body plan
Ingår i Evolution & Development, 2024
- DOI för Developmental and genomic insight into the origin of the tardigrade body plan
- Ladda ner fulltext (pdf) av Developmental and genomic insight into the origin of the tardigrade body plan
Ingår i EvoDevo, 2024
- DOI för Single-cell sequencing suggests a conserved function of Hedgehog-signalling in spider eye development
- Ladda ner fulltext (pdf) av Single-cell sequencing suggests a conserved function of Hedgehog-signalling in spider eye development
Alla publikationer
Artiklar i tidskrift
Ingår i DISCOVER DEVELOPMENTAL BIOLOGY, 2025
- DOI för Early expression of chelicerate hedgehog orthologs and its bearing on the homology of arthropod head segments
- Ladda ner fulltext (pdf) av Early expression of chelicerate hedgehog orthologs and its bearing on the homology of arthropod head segments
Single-cell RNA sequencing of mid-to-late stage spider embryos: new insights into spider development
Ingår i BMC Genomics, 2024
- DOI för Single-cell RNA sequencing of mid-to-late stage spider embryos: new insights into spider development
- Ladda ner fulltext (pdf) av Single-cell RNA sequencing of mid-to-late stage spider embryos: new insights into spider development
Developmental and genomic insight into the origin of the tardigrade body plan
Ingår i Evolution & Development, 2024
- DOI för Developmental and genomic insight into the origin of the tardigrade body plan
- Ladda ner fulltext (pdf) av Developmental and genomic insight into the origin of the tardigrade body plan
Ingår i EvoDevo, 2024
- DOI för Single-cell sequencing suggests a conserved function of Hedgehog-signalling in spider eye development
- Ladda ner fulltext (pdf) av Single-cell sequencing suggests a conserved function of Hedgehog-signalling in spider eye development
New insights into mesoderm and endoderm development, and the nature of the onychophoran blastopore
Ingår i Frontiers in Zoology, 2024
- DOI för New insights into mesoderm and endoderm development, and the nature of the onychophoran blastopore
- Ladda ner fulltext (pdf) av New insights into mesoderm and endoderm development, and the nature of the onychophoran blastopore
Evolution of the Spider Homeobox Gene Repertoire by Tandem and Whole Genome Duplication
Ingår i Molecular biology and evolution, 2023
- DOI för Evolution of the Spider Homeobox Gene Repertoire by Tandem and Whole Genome Duplication
- Ladda ner fulltext (pdf) av Evolution of the Spider Homeobox Gene Repertoire by Tandem and Whole Genome Duplication
Expression of posterior Hox genes and opisthosomal appendage development in a mygalomorph spider
Ingår i Development, Genes and Evolution, s. 107-121, 2023
- DOI för Expression of posterior Hox genes and opisthosomal appendage development in a mygalomorph spider
- Ladda ner fulltext (pdf) av Expression of posterior Hox genes and opisthosomal appendage development in a mygalomorph spider
Comment on "The lower Cambrian lobopodian Cardiodictyon resolves the origin of euarthropod brains"
Ingår i Science, 2023
Ingår i Developmental Dynamics, s. 172-185, 2023
Phylogenetic analysis of forkhead transcription factors in the Panarthropoda
Ingår i Development, Genes and Evolution, s. 39-48, 2022
- DOI för Phylogenetic analysis of forkhead transcription factors in the Panarthropoda
- Ladda ner fulltext (pdf) av Phylogenetic analysis of forkhead transcription factors in the Panarthropoda
Embryonic expression patterns of Wnt genes in the RTA-clade spider Cupiennius salei
Ingår i Gene Expression Patterns, 2022
- DOI för Embryonic expression patterns of Wnt genes in the RTA-clade spider Cupiennius salei
- Ladda ner fulltext (pdf) av Embryonic expression patterns of Wnt genes in the RTA-clade spider Cupiennius salei
Lack of evidence for conserved parasegmental grooves in arthropods
Ingår i Development, Genes and Evolution, s. 27-37, 2022
- DOI för Lack of evidence for conserved parasegmental grooves in arthropods
- Ladda ner fulltext (pdf) av Lack of evidence for conserved parasegmental grooves in arthropods
A comprehensive study of arthropod and onychophoran Fox gene expression patterns
Ingår i PLOS ONE, 2022
- DOI för A comprehensive study of arthropod and onychophoran Fox gene expression patterns
- Ladda ner fulltext (pdf) av A comprehensive study of arthropod and onychophoran Fox gene expression patterns
Molecular evidence for a single origin of ultrafiltration-based excretory organs
Ingår i Current Biology, s. 3629-+, 2021
Ingår i G3, 2021
- DOI för Widespread retention of ohnologs in key developmental gene families following whole-genome duplication in arachnopulmonates
- Ladda ner fulltext (pdf) av Widespread retention of ohnologs in key developmental gene families following whole-genome duplication in arachnopulmonates
Panarthropod tiptop/teashirt and spalt orthologs and their potential role as "trunk"-selector genes
Ingår i EvoDevo, 2021
- DOI för Panarthropod tiptop/teashirt and spalt orthologs and their potential role as "trunk"-selector genes
- Ladda ner fulltext (pdf) av Panarthropod tiptop/teashirt and spalt orthologs and their potential role as "trunk"-selector genes
Ingår i Arthropod structure & development, 2021
Ingår i EvoDevo, 2021
- DOI för A chelicerate Wnt gene expression atlas: novel insights into the complexity of arthropod Wnt-patterning
- Ladda ner fulltext (pdf) av A chelicerate Wnt gene expression atlas: novel insights into the complexity of arthropod Wnt-patterning
Ingår i Development, Genes and Evolution, s. 239-245, 2020
- DOI för Expression of the zinc finger transcription factor Sp6-9 in the velvet worm Euperipatoides kanangrensis suggests a conserved role in appendage development in Panarthropoda
- Ladda ner fulltext (pdf) av Expression of the zinc finger transcription factor Sp6-9 in the velvet worm Euperipatoides kanangrensis suggests a conserved role in appendage development in Panarthropoda
Ingår i Development, Genes and Evolution, s. 65-73, 2020
- DOI för The forkhead box containing transcription factor FoxB is a potential component of dorsal-ventral body axis formation in the spider Parasteatoda tepidariorum
- Ladda ner fulltext (pdf) av The forkhead box containing transcription factor FoxB is a potential component of dorsal-ventral body axis formation in the spider Parasteatoda tepidariorum
Ingår i Development, Genes and Evolution, s. 247-256, 2020
- DOI för The embryonic expression pattern of a second, hitherto unrecognized, paralog of the pair-rule gene sloppy-paired in the beetle Tribolium castaneum
- Ladda ner fulltext (pdf) av The embryonic expression pattern of a second, hitherto unrecognized, paralog of the pair-rule gene sloppy-paired in the beetle Tribolium castaneum
Phylogenetic analysis and embryonic expression of panarthropod Dmrt genes
Ingår i Frontiers in Zoology, 2019
- DOI för Phylogenetic analysis and embryonic expression of panarthropod Dmrt genes
- Ladda ner fulltext (pdf) av Phylogenetic analysis and embryonic expression of panarthropod Dmrt genes
FoxB, a new and highly conserved key factor in arthropod dorsal-ventral (DV) limb patterning
Ingår i EvoDevo, 2019
- DOI för FoxB, a new and highly conserved key factor in arthropod dorsal-ventral (DV) limb patterning
- Ladda ner fulltext (pdf) av FoxB, a new and highly conserved key factor in arthropod dorsal-ventral (DV) limb patterning
Embryonic expression of priapulid Wnt genes
Ingår i Development, Genes and Evolution, s. 125-135, 2019
- DOI för Embryonic expression of priapulid Wnt genes
- Ladda ner fulltext (pdf) av Embryonic expression of priapulid Wnt genes
The last common ancestor of Ecdysozoa had an adult terminal mouth
Ingår i Arthropod structure & development, s. 155-158, 2019
Gene expression analysis of potential morphogen signalling modifying factors in Panarthropoda
Ingår i EvoDevo, 2018
- DOI för Gene expression analysis of potential morphogen signalling modifying factors in Panarthropoda
- Ladda ner fulltext (pdf) av Gene expression analysis of potential morphogen signalling modifying factors in Panarthropoda
Ingår i BMC Evolutionary Biology, 2018
- DOI för Embryonic expression patterns and phylogenetic analysis of panarthropod sox genes: insight into nervous system development, segmentation and gonadogenesis
- Ladda ner fulltext (pdf) av Embryonic expression patterns and phylogenetic analysis of panarthropod sox genes: insight into nervous system development, segmentation and gonadogenesis
Ingår i Development, Genes and Evolution, s. 171-178, 2018
- DOI för Embryonic expression of a Long Toll (Loto) gene in the onychophorans Euperipatoides kanangrensis and Cephalofovea clandestina
- Ladda ner fulltext (pdf) av Embryonic expression of a Long Toll (Loto) gene in the onychophorans Euperipatoides kanangrensis and Cephalofovea clandestina
The house spider genome reveals an ancient whole-genome duplication during arachnid evolution
Ingår i BMC Biology, 2017
- DOI för The house spider genome reveals an ancient whole-genome duplication during arachnid evolution
- Ladda ner fulltext (pdf) av The house spider genome reveals an ancient whole-genome duplication during arachnid evolution
Ingår i EvoDevo, 2017
- DOI för Comparative analysis of gene expression patterns in the arthropod labrum and the onychophoran frontal appendages, and its implications for the arthropod head problem
- Ladda ner fulltext (pdf) av Comparative analysis of gene expression patterns in the arthropod labrum and the onychophoran frontal appendages, and its implications for the arthropod head problem
Ingår i Developmental Biology, s. 155-164, 2017
Origin and Evolution of the Panarthropod Head - a Deep Time Perspective
Ingår i Integrative and Comparative Biology, 2017
A molecular view of onychophoran segmentation
Ingår i Arthropod structure & development, s. 341-353, 2017
Gene expression reveals evidence for EGFR-dependent proximal-distal limb patterning in a myriapod
Ingår i Evolution & Development, s. 124-135, 2017
- DOI för Gene expression reveals evidence for EGFR-dependent proximal-distal limb patterning in a myriapod
- Ladda ner fulltext (pdf) av Gene expression reveals evidence for EGFR-dependent proximal-distal limb patterning in a myriapod
Ingår i Development, Genes and Evolution, s. 69-77, 2016
- DOI för Gene expression analysis reveals that Delta/Notch signalling is not involved in onychophoran segmentation
- Ladda ner fulltext (pdf) av Gene expression analysis reveals that Delta/Notch signalling is not involved in onychophoran segmentation
The evolution and expression of panarthropod frizzled genes
Ingår i Frontiers in Ecology and Evolution, 2015
- DOI för The evolution and expression of panarthropod frizzled genes
- Ladda ner fulltext (pdf) av The evolution and expression of panarthropod frizzled genes
Aspects of dorso-ventral and proximo-distal limb patterning in onychophorans
Ingår i Evolution & Development, s. 21-33, 2015
- DOI för Aspects of dorso-ventral and proximo-distal limb patterning in onychophorans
- Ladda ner fulltext (pdf) av Aspects of dorso-ventral and proximo-distal limb patterning in onychophorans
Fate and nature of the onychophoran mouth-anus furrow and its contribution to the blastopore
Ingår i Proceedings of the Royal Society of London. Biological Sciences, 2015
- DOI för Fate and nature of the onychophoran mouth-anus furrow and its contribution to the blastopore
Ingår i International Journal of Developmental Biology, s. 343-347, 2014
Onychophoran Hox genes and the evolution of arthropod Hox gene expression
Ingår i Frontiers in Zoology, s. 22, 2014
- DOI för Onychophoran Hox genes and the evolution of arthropod Hox gene expression
- Ladda ner fulltext (pdf) av Onychophoran Hox genes and the evolution of arthropod Hox gene expression
Ingår i EvoDevo, s. 14, 2014
- DOI för Analysis of the Wnt gene repertoire in an onychophoran provides new insights into the evolution of segmentation
- Ladda ner fulltext (pdf) av Analysis of the Wnt gene repertoire in an onychophoran provides new insights into the evolution of segmentation
Ingår i Gene Expression Patterns, s. 55-61, 2014
- DOI för Identification and embryonic expression of Wnt2, Wnt4, Wnt5 and Wnt9 in the millipede Glomeris marginata (Myriapoda: Diplopoda)
- Ladda ner fulltext (pdf) av Identification and embryonic expression of Wnt2, Wnt4, Wnt5 and Wnt9 in the millipede Glomeris marginata (Myriapoda: Diplopoda)
Expression of arthropod distal limb-patterning genes in the onychophoran Euperipatoides kanangrensis
Ingår i Development, Genes and Evolution, s. 87-96, 2014
- DOI för Expression of arthropod distal limb-patterning genes in the onychophoran Euperipatoides kanangrensis
- Ladda ner fulltext (pdf) av Expression of arthropod distal limb-patterning genes in the onychophoran Euperipatoides kanangrensis
Ingår i Die Naturwissenschaften, s. 33-43, 2013
- DOI för Developmental abnormalities in Glomeris marginata (Villers 1789) (Myriapoda: Diplopoda): implications for body axis determination in a myriapod
- Ladda ner fulltext (pdf) av Developmental abnormalities in Glomeris marginata (Villers 1789) (Myriapoda: Diplopoda): implications for body axis determination in a myriapod
A curious abnormally developed embryo of the pill millipede Glomeris marginata (Villers, 1789)
Ingår i ZooKeys, s. 67-75, 2013
- DOI för A curious abnormally developed embryo of the pill millipede Glomeris marginata (Villers, 1789)
- Ladda ner fulltext (pdf) av A curious abnormally developed embryo of the pill millipede Glomeris marginata (Villers, 1789)
Ingår i Developmental Biology, s. 224-234, 2013
Ingår i Development, Genes and Evolution, s. 299-309, 2012
Ingår i BMC Developmental Biology, s. 15, 2012
- DOI för Expression of pair rule gene orthologs in the blastoderm of a myriapod: evidence for pair rule-like mechanisms?
- Ladda ner fulltext (pdf) av Expression of pair rule gene orthologs in the blastoderm of a myriapod: evidence for pair rule-like mechanisms?
Deuterostomic Development in the Protostome Priapulus caudatus
Ingår i Current Biology, s. 2161-2166, 2012
Ingår i BMC Evolutionary Biology, s. 50, 2011
- DOI för Expression of collier in the premandibular segment of myriapods: support for the traditional Atelocerata concept or a case of convergence?
- Ladda ner fulltext (pdf) av Expression of collier in the premandibular segment of myriapods: support for the traditional Atelocerata concept or a case of convergence?
Expression of myriapod pair rule gene orthologs
Ingår i EvoDevo, 2011
- DOI för Expression of myriapod pair rule gene orthologs
- Ladda ner fulltext (pdf) av Expression of myriapod pair rule gene orthologs
Ingår i Development, Genes and Evolution, s. 351-355, 2011
Diplosegmentation in the pill millipede Glomeris marginata is the result of dorsal fusion
Ingår i Evolution & Development, s. 477-487, 2011
Gene expression suggests conserved mechanisms patterning the heads of insects and myriapods
Ingår i Developmental Biology, s. 64-72, 2011
Ingår i BMC Evolutionary Biology, s. 374, 2010
- DOI för Conservation, loss, and redeployment of Wnt ligands in protostomes: implications for understanding the evolution of segment formation
- Ladda ner fulltext (pdf) av Conservation, loss, and redeployment of Wnt ligands in protostomes: implications for understanding the evolution of segment formation
Ingår i EvoDevo, 2010
- DOI för Gene expression suggests conserved aspects of Hox gene regulation in arthropods and provides additional support for monophyletic Myriapoda
- Ladda ner fulltext (pdf) av Gene expression suggests conserved aspects of Hox gene regulation in arthropods and provides additional support for monophyletic Myriapoda
Ingår i Development, Genes and Evolution, s. 117-122, 2010
- DOI för Head patterning and Hox gene expression in an onychophoran and its implications for the arthropod head problem
- Ladda ner fulltext (pdf) av Head patterning and Hox gene expression in an onychophoran and its implications for the arthropod head problem
Ingår i Evolution & Development, s. 363-372, 2010
- DOI för Gene expression patterns in an onychophoran reveal that regionalization predates limb segmentation in pan-arthropods
- Ladda ner fulltext (pdf) av Gene expression patterns in an onychophoran reveal that regionalization predates limb segmentation in pan-arthropods
Ingår i Insect molecular biology (Print), s. 47-62, 2010
Genome Sequence of the Pea Aphid Acyrthosiphon pisum
Ingår i PLoS biology, 2010
- DOI för Genome Sequence of the Pea Aphid Acyrthosiphon pisum
- Ladda ner fulltext (pdf) av Genome Sequence of the Pea Aphid Acyrthosiphon pisum
Embryonic development and the understanding of the adult body plan in myriapods
Ingår i Soil Organisms, s. 337-346, 2009
The hatching larva of the priapulid worm Halicryptus spinulosus
Ingår i Frontiers in Zoology, 2009
- DOI för The hatching larva of the priapulid worm Halicryptus spinulosus
- Ladda ner fulltext (pdf) av The hatching larva of the priapulid worm Halicryptus spinulosus
Hatching and earliest larval stages of the priapulid worm Priapulus caudatus
Ingår i Invertebrate biology., s. 157-171, 2009
Early embryonic development of the priapulid worm Priapulus caudatus
Ingår i Evolution & Development, s. 326-338, 2008
- DOI för Early embryonic development of the priapulid worm Priapulus caudatus
- Ladda ner fulltext (pdf) av Early embryonic development of the priapulid worm Priapulus caudatus
Evidence for Wg-independent tergite boundary formation in the millipede Glomeris marginata
Ingår i Development, Genes and Evolution, s. 361-370, 2008
Diverged and conserved aspects of heart formation in a spider
Ingår i Evolution & Development, s. 155-165, 2008
Ingår i Evolution & Development, s. 143-154, 2008
- DOI för The T-box genes H15 and optomotor-blind in the spiders Cupiennius salei, Tegenaria atrica and Achaearanea tepidariorum and the dorsoventral axis of arthropod appendages
- Ladda ner fulltext (pdf) av The T-box genes H15 and optomotor-blind in the spiders Cupiennius salei, Tegenaria atrica and Achaearanea tepidariorum and the dorsoventral axis of arthropod appendages
A review of the correlation of tergites, sternites, and leg pairs in diplopods
Ingår i Frontiers in Zoology, 2006
- DOI för A review of the correlation of tergites, sternites, and leg pairs in diplopods
- Ladda ner fulltext (pdf) av A review of the correlation of tergites, sternites, and leg pairs in diplopods
The ten Hox genes of the millipede Glomeris marginata
Ingår i Development, Genes and Evolution, s. 451-465, 2006
Ingår i Norwegian Journal of Entomology, s. 129-137, 2006
Ingår i Evolution & Development, s. 51-57, 2005
Pair rule gene orthologs in spider segmentation
Ingår i Evolution & Development, s. 618-628, 2005
Ingår i Developmental Biology, s. 89-104, 2004
- DOI för Gene expression suggests decoupled dorsal and ventral segmentation in the millipede Glomeris marginata (Myriapoda: Diplopoda)
- Ladda ner fulltext (pdf) av Gene expression suggests decoupled dorsal and ventral segmentation in the millipede Glomeris marginata (Myriapoda: Diplopoda)
Ingår i Developmental Biology, s. 119-140, 2003
Artiklar, forskningsöversikt
Hox genes in spiders: Their significance for development and evolution
Ingår i Seminars in Cell and Developmental Biology, s. 24-34, 2024
Review of extra-embryonic tissues in the closest arthropod relatives, onychophorans and tardigrades
Ingår i Philosophical Transactions of the Royal Society of London. Biological Sciences, 2022
Origin and evolution of the panarthropod head: A palaeobiological and developmental perspective
Ingår i Arthropod structure & development, s. 354-379, 2017