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Diploaspis

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Journal Article
Published: 21 July 2016
Geological Magazine (2017) 154 (1): 175–180.
...JAMES C. LAMSDELL; DEREK E. G. BRIGGS Abstract A single specimen of a new species of the chasmataspidid Diploaspis Størmer, 1972 is described from the upper Silurian (Pridoli) Phelps Member of the Fiddlers Green Formation (Bertie Group) in Herkimer County, New York State, USA. Diploaspis praecursor...
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<b>Diploaspis</b> praecursor  sp. nov. Reconstruction. The shape and
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Published: 21 July 2016
Figure 3. Diploaspis praecursor sp. nov. Reconstruction. The shape and position of the lateral and median eyes, swimming paddle and telson are inferred from the other Diploaspis species. Scale bar = 5 mm.
Journal Article
Published: 01 January 2005
Journal of Paleontology (2005) 79 (1): 110–124.
... tergites, a large sixth tergite, and fused posterior tergites. The chasmataspidid closely resembles Diploaspis casteri from the Emsian assemblage of Alken an der Mosel, but is readily discernible as a new species, D. muelleri , by a strong tuberculation of its dorsal integument. With only fragmentary...
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Figure  10 — <b>Diploaspis</b> muelleri  n. sp., Siegenian of Hombach, Germany. Re...
Published: 01 January 2005
Figure 10 — Diploaspis muelleri n. sp., Siegenian of Hombach, Germany. Reconstruction in dorsal view, appendages omitted due to lack of evidence, lateral spines on telson omitted due to their minute size
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Figure  9 — <b>Diploaspis</b> muelleri  n. sp., Siegenian of Hombach, Germany. Cam...
Published: 01 January 2005
Figure 9 — Diploaspis muelleri n. sp., Siegenian of Hombach, Germany. Camera lucida drawings. Scale 5 mm. 1, PWL 2002/5023a,b-LS, part and counterpart; 2, PWL 2002/5022-LS
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Figure  6 — <b>Diploaspis</b> muelleri  n. sp., Siegenian of Hombach, Germany. Pho...
Published: 01 January 2005
Figure 6 — Diploaspis muelleri n. sp., Siegenian of Hombach, Germany. Photographs of holotype. Alcohol immersion, normal light; scale 3 mm. 1, PWL 2002/5020a-LS, part; 2, PWL 2002/5020b-LS, counterpart
Journal Article
Published: 01 November 2000
Scottish Journal of Geology (2000) 36 (2): 151–158.
... of fossil chelicerates and until recently were known from only three species: Chasmataspis laurencii Caster and Brooks (1956 ) from the Ordovician of Tennessee, USA and Diploaspis casteri Størmer (1972) and Heteroaspis novojilovi Størmer (1972) both from the Early Devonian of Germany. Both Caster...
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Figure  7 — <b>Diploaspis</b> muelleri  n. sp., Siegenian of Hombach, Germany. Pho...
Published: 01 January 2005
Figure 7 — Diploaspis muelleri n. sp., Siegenian of Hombach, Germany. Photographs of paratype. Alcohol immersion; scale 3 mm. 1, 2, PWL 2002/ 5021a-LS, part, in normal and polarized light, respectively; 3, 4, PWL 2002/5021b-LS, counterpart, in normal and polarized light, respectively
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Holotype of  <b>Diploaspis</b> praecursor  sp. nov., YPM IP 300790. (a)
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Published: 21 July 2016
Figure 2. Holotype of Diploaspis praecursor sp. nov., YPM IP 300790. (a) Photograph. (b) Interpretive drawing. Dashed lines indicate the outline of structures obscured by overlying features. Abbreviations: C, carapace; MR, marginal rim
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Figure  8 — <b>Diploaspis</b> muelleri  n. sp., Siegenian of Hombach, Germany. Cam...
Published: 01 January 2005
Figure 8 — Diploaspis muelleri n. sp., Siegenian of Hombach, Germany. Camera lucida drawings. Scale 2 mm. 1, 2, Holotype PWL 2002/5020a,b-LS, part and counterpart, respectively, tergites numbered; 3, 4, paratype PWL 2002/5021a,b-LS, part and counterpart, respectively. Abbreviations: bgl, book
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Phylogeny of Chasmataspidida as presented in Selden, Lamsdell &amp; Liu ( 2...
Published: 21 July 2016
Figure 4. Phylogeny of Chasmataspidida as presented in Selden, Lamsdell & Liu ( 2015 ) with ranges correlated to the geologic timescale. The hypothesized phylogenetic position of Diploaspis praecursor is indicated with a dashed line. Taxa from Laurentia
Journal Article
Published: 09 September 2016
Journal of the Geological Society (2017) 174 (1): 18–22.
.../M38.1 Lamsdell , J.C. & Briggs , D.E.G. 2016 . The first diploaspidid (Chelicerata: Chasmataspidida) from North America (Silurian, Bertie Group, New York State) is the oldest species of Diploaspis . Geological Magazine . First published online July 21, 2016, http://doi.org...
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Journal Article
Published: 30 January 2019
Geological Magazine (2019) 156 (10): 1708–1714.
...: Chasmataspidida) from North America (Silurian, Bertie Group, New York State) is the oldest species of Diploaspis . Geological Magazine 154 , 175 – 80 . Lamsdell JC , Briggs DEG , Liu HP , Witzke BJ and McKay RM ( 2015 ) The oldest described eurypterid: a giant Middle...
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Journal Article
Journal: Paleobiology
Published: 01 May 2021
Paleobiology (2021) 47 (2): 271–283.
... Letters 6 : 265 – 269 . Lamsdell , J. C. , and D. E. G. Briggs . 2017 . The first diploaspidid (Chelicerata: Chasmataspidida) from North America (Silurian, Bertie Group, New York State) is the oldest species of Diploaspis . Geological Magazine 154 : 175 – 80 . Lamsdell , J...
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Journal Article
Journal: PALAIOS
Published: 01 April 2005
PALAIOS (2005) 20 (2): 101–120.
.... , and Anderson , L.I. , 2001 . On the Emsian (Lower Devonian) arthropods of the Rhenish Schiefergebirge: 3. The chasmataspidid Diploaspis : Paläontologische Zeitschrift , v. 75 , p. 253 – 269 . Fahlbusch , K. 1966 . Eine Pteraspiden-Fauna aus dem Unterdevon von Alken an der Mosel...
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