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Class of arthropods
Merostomata is a class of chelicerate arthropods that contains the extinct Eurypterida (sea scorpions) and the extant Xiphosura (horseshoe crabs). The
Merostomata
Order of marine chelicerates
Merostomata is still seen in textbooks, without reference to the Eurypterida, some have urged that this usage should be discouraged. The Merostomata label
Xiphosura
Order of arthropods (fossil)
classified the Merostomata as a subclass within the Arachnida, raised to the rank of class. In 1866, Ernst Haeckel classified the Merostomata (containing
Eurypterid
Sipuncula (peanut worms) Source: Arachnida (spiders, scorpions, and kin) Merostomata (horseshoe crabs) Pycnogonida (sea spiders) Source: Chilopoda (centipedes)
List_of_animal_classes
Genus of horseshoe crabs
Plenary Powers, of the generic name Limulus Müller (O. F.), 1785 (class Merostomata) and confirmation of the entry of that name on the 'Official List of
Limulus
Species of arthropod
pp. 5–24. ISBN 978-0-387-89959-6. P. Gopalakrishnakone (1990). "Class Merostomata". A Colour Guide to Dangerous Animals. NUS Press. pp. 114–115. ISBN 978-9971-69-150-9
Tachypleus_gigas
Group of arthropods
Chelicerata Arachnida Merostomata Pycnogonida Trilobitomorpha Uniramia Myriapoda Symphyla Chilopoda Diplopoda Hexapoda Entognatha Ectognatha Crustacea
Uniramia
Species of arthropod
traditionally grouped with the extinct eurypterids (sea scorpions) as the Merostomata. However, recent studies suggest a relationship between the eurypterids
Atlantic_horseshoe_crab
English geologist and paleontologist
1921. He published a Monograph of the British Fossil Crustacea, Order Merostomata (Palaeontograph. Soc. 1866–1878); A Monograph of Carboniferous Trilobites
Henry_Woodward_(geologist)
Extinct genus of eurypterid
doi:10.1080/14772011003603564. S2CID 85398946. Størmer, Leif (1955). "Merostomata". Treatise on Invertebrate Paleontology, Part P Arthropoda 2, Chelicerata
Megarachne
Genus of horseshoe crab relatives
Museum Bern, online at http://wsc.nmbe.ch, version 16.0 Størmer, L. 1955. Merostomata. Treatise on Invertebrate Paleontology, Part P Arthropoda 2, Chelicerata
Euproops
Extinct genus of Arthropods
II. No. 6. Middle Cambrian Branchiopoda, Malacostraca, Trilobita and Merostomata". Smithsonian Miscellaneous Collections. 57 (6): 192. Whittington, H
Marrella
Extinct genus of sea scorpions
Sciences. 94 (3): 235–242. doi:10.1017/S0263593303000154. L. Størmer. 1955. Merostomata. Treatise on Invertebrate Paleontology, Part P Arthropoda 2, Chelicerata
Drepanopterus
(1912). Middle Cambrian Branchiopoda, Malacostraca, Trilobita, and Merostomata (PDF). Smithsonian Institution. pp. 182–185. Fu, Dongjing; Zhang, Xingliang
List_of_Cambrian_arthropods
Extinct family of basal arthropods
II: No. 6.—Middle Cambrian Branchiopoda, Malacostraca, Trilobita, and Merostomata". Smithsonian Miscellaneous Collections. 57 (6). Whittington, H. B. (26
Opabiniidae
Extinct order of arthropods
work on the group by Gilbert O. Raasch in his 1939 publication Cambrian Merostomata, who named the group and many genera of aglaspidids, they were considered
Aglaspidida
Extinct order of basal arthropods
D. 1912. Middle Cambrian Branchiopoda, Malacostraca, Trilobita and Merostomata. Smithsonian Miscellaneous Collections, 57: 145–228. Wu, Yu; Pates, Stephen;
Radiodonta
Extinct stem-arthropod species found in Cambrian fossil deposits
D. 1912. Middle Cambrian Branchiopoda, Malacostraca, Trilobita and Merostomata. Smithsonian Miscellaneous Collections, 57: 145-228. Gould, S. J. (1990)
Opabinia
Dutch zoologist (1873–1939)
Verwandtschaft der Merostomata mit den Arachnida und den anderen Abteilungen der Arthropoda (with Reinhard Demoll), 1921 – The relationship of Merostomata with arachnids
Jan_Versluys
Genus of horseshoe crab relatives
LeGrande (1974). "Revision of the suborder Synziphosurina (Chelicerata, Merostomata) : with remarks on merostome phylogeny. American Museum novitates; no
Limuloides
Extinct genus of Devonian organisms
A monograph of the British fossil Crustacea, belonging to the order Merostomata. London: Printed for the Palæontographical Society. Kjellesvig-Waering
Stylonurus
Extinct family of eurypterids
1098/rsbl.2007.0491. PMC 2412931. PMID 18029297. Størmer, Leif (1955). "Merostomata". Treatise on Invertebrate Paleontology, Part P Arthropoda 2, Chelicerata
Pterygotidae
Extinct genus of Devonian organisms
nmbe.ch/resources/fossils/Fossils16.0.pdf (PDF). Størmer, L. (1955) Merostomata. Treatise on Invertebrate Paleontology, Part P Arthropoda 2, Chelicerata
Rhenopterus
Extinct genus of Cambrian bivalved arthropod
Cambrian Branchiopoda, Malacostraca. Trilobita. Merostomata. Smithson. Misc. Collect. Trilobita. Merostomata. Smithson. Misc. Collect. 57, 145–228. Simonetta
Odaraia
Geologic formation in Bolivia
(30 July 1974). "Revision of the suborder Synziphosurina (Chelicerata, Merostomata) : with remarks on merostome phylogeny". American Museum Novitates. 2543:
Icla_Formation
Family of arthropods (fossil)
011. Archived from the original (PDF) on 2011-07-18. Størmer, L 1955. Merostomata. Treatise on Invertebrate Paleontology, Part P Arthropoda 2, Chelicerata
Megalograptidae
Extinct genus of arthropods
nmbe.ch/resources/fossils/Fossils16.0.pdf (PDF). L. Størmer (1955). "Merostomata". Treatise on Invertebrate Paleontology, Part P Arthropoda 2, Chelicerata
Dolichopterus
Extinct genus of radiodonts
(1912-03-13). "Middle Cambrian Branchiopoda, Malacostraca, Trilobita, and Merostomata". Smithsonian Miscellaneous Collections. 57 (6). Daley, Allison C.; Budd
Hurdia
Extinct genus of arthropods
ISSN 1471-2954. PMC 12606246. PMID 41218776. Størmer, Leif (1955). "Merostomata". Part P Arthropoda 2, Chelicerata. Treatise on Invertebrate Paleontology
Pentecopterus
Geological formation in Germany and Switzerland
Volker (1987-06-01). "Paleolimulus fuchsbergensis n. sp. (Xiphosura, Merostomata) aus der oberen Trias von Nordwestdeutschland, mit einer Übersicht zur
Trossingen_Formation
Extinct genus of sea scorpions
Størmer, L 1955. Merostomata. Treatise on Invertebrate Paleontology, Part P Arthropoda 2, Chelicerata, P36. Størmer, L 1955. Merostomata. Treatise on Invertebrate
Ctenopterus
Genus of trilobites
time". Evolution and morphology of the Trilobita, Trilobitoidea and Merostomata. Vol. 4. pp. 399–408. doi:10.18261/8200049639-1975-26. ISBN 8 2-00-04963-9
Phacops
Extinct genus of sea scorpions
eurypterid. Paleontology portal List of eurypterids Størmer, L 1955. Merostomata. Treatise on Invertebrate Paleontology, Part P Arthropoda 2, Chelicerata
Mycterops
Extinct genus of sea scorpions
eurypterids (e.g. order Eurypterida) were thought to belong to the class Merostomata along with order Xiphosura. It is now believed that eurypterids are a
Eurypterus
Extinct family of Devonian organisms
male genital appendage was long. List of eurypterids Størmer, L 1955. Merostomata. Treatise on Invertebrate Paleontology, Part P Arthropoda 2, Chelicerata
Dolichopteridae
Dubious genus of arthropod
D. 1912. Middle Cambrian Branchiopoda, Malacostraca, Trilobita and Merostomata. Smithsonian Miscellaneous Collections, 57: 145-228. Whittington, Harry
Tontoia
Extinct genus of chelicerate
LeGrande (1974). "Revision of the suborder Synziphosurina (Chelicerata, Merostomata) : with remarks on merostome phylogeny. American Museum novitates; no
Legrandella
Extinct genus of arthropods
(1912). "Middle Cambrian Branchiopoda, Malacostraca, Trilobita and Merostomata". Smithsonian Miscellaneous Collections. 57: 145–228. Caron, Jean-Bernard;
Molaria
Extinct family of arthropods
History. 2025 (473): 82. doi:10.1206/0003-0090.473.1.1. Størmer, L 1955. Merostomata. Treatise on Invertebrate Paleontology, Part P Arthropoda 2, Chelicerata
Mycteroptidae
Genus of prehistoric brachiopod
1957) - 29 Sep 1953 - p7". Trove. Retrieved 2024-04-17. Størmer, L 1955. Merostomata. Treatise on Invertebrate Paleontology, Part P Arthropoda 2, Chelicerata
Melbournopterus
Extinct genus of trilobites
lines". Evolution and Morphology of the Trilobita, Trilobitoidea and Merostomata. Fossils and Strata. 4. Universitetsforlaget: 155–178. doi:10.18261/8200049639-1975-09
Isotelus
Extinct family of arthropods
Ruedermann, 1912 Laurieipterus Kjellesvig-Waering, 1966 Størmer, L 1955. Merostomata. Treatise on Invertebrate Paleontology, Part P Arthropoda 2, Chelicerata
Stylonuridae
Extinct genus of arthropods
Walcott, C.D. Middle Cambrian Branchiopoda, Malacostraca, Trilobita, and Merostomata. In: Cambrian Geology and Paleontology II. Smithsonian. 1914.s:Cambrian
Naraoia
Extinct genus of sea scorpions
wsc.nmbe.ch/resources/fossils/Fossils16.0.pdf (PDF). Størmer, L. 1955. Merostomata. Treatise on Invertebrate Paleontology, Part P Arthropoda 2, Chelicerata
Brachyopterus
Extinct genus of chelicerate
LeGrande (1974). "Revision of the suborder Synziphosurina (Chelicerata, Merostomata) : with remarks on merostome phylogeny. American Museum novitates; no
Bunaia
Extinct genus of arthropods
auf Oesel" Størmer, Leif (1934). I Kommisjon hos Jacob Dybwad (ed.). Merostomata from the Downtonian Sandstone of Ringerike, Norway. Kjellesvig-Waering
Erettopterus
Cambrian arthropod
paleontology II: Middle Cambrian Branchiopoda, Malacostraca, Trilobita, and Merostomata". Smithsonian Miscellaneous Collections. 57 (6): 453–456. Simon Conway
Waptia
Fossil-bearing member
(1912). "Middle Cambrian Branchiopoda, Malacostraca, Trilobita, and Merostomata". Smithsonian Miscellaneous Collections. 57. Washington, D. C.: 145–228
Phyllopod_bed
Group of arthropods
LeGrande (1974). "Revision of the suborder Synziphosurina (Chelicerata, Merostomata) : with remarks on merostome phylogeny. American Museum novitates; no
Synziphosurina
Extinct genus of arthropods
(1912). "Middle Cambrian Branchiopoda, Malacostraca, Trilobita and Merostomata". Smithsonian Miscellaneous Collections. 57: 145–228. Hou, Xianguang;
Yohoia
Extinct genus of arthropods
Palæontology. No. 6: Middle Cambrian Beanchiopoda, Malacostraca, Trilobita, and Merostomata. By C. D. Walcott. Smithsonian Miscellaneous Collections, vol. lvii,
Emeraldella
Family of eurypterids
ISSN 2039-4942. Chernyshev, Boris I. (1948). "New representative of Merostomata from the Lower Carboniferous". State University of Kiev, Geological Collections
Adelophthalmoidea
Extinct genus of arthropods
anterolateral (in the middle of the front) to lateral. In his book Cambrian Merostomata of 1939, the American paleontologist and geologist Gilbert Oscar Raasch
Strabops
Woodward created the subclass Merostomata to contain eurypterids and xiphosurans. Ernst Haeckel classified the Merostomata (containing virtually only the
Timeline of eurypterid research
Timeline_of_eurypterid_research
American zoologist (1873–1912)
he rejected a prevalent idea at the time that arachnids evolved from Merostomata (a now obsolete group including horseshoe crabs and the extinct eurypterids)
Thomas Harrison Montgomery Jr.
Thomas_Harrison_Montgomery_Jr.
Genus of horseshoe crab relatives
LeGrande (1974). "Revision of the suborder Synziphosurina (Chelicerata, Merostomata) : with remarks on merostome phylogeny". American Museum Novitates (2543)
Bunodes
Extinct genus of eurypterid
13P. doi:10.1111/j.1502-3931.1988.tb01746.x. Størmer, Leif (1955). "Merostomata". Part P Arthropoda 2, Chelicerata. Treatise on Invertebrate Paleontology
Pterygotus
System of classification of animals with emphasis on the invertebrates
Subphylum Cheliceriformes Class Pycnogonida Class Chelicerata Subclass Merostomata Order Eurypterida Order Xiphosura Subclass Arachnida Order Acari Suborder
Taxonomy of invertebrates (Brusca & Brusca, 2003)
Taxonomy_of_invertebrates_(Brusca_&_Brusca,_2003)
Genus of arthropods (fossil)
(12): 193–203. Bell, Walter A. (1922). "A New Genus of Characeae and New Merostomata from the Coal Measures of Nova Scotia". Transactions of the Royal Society
Adelophthalmus
Extinct genus of arthropods
Fossils and Strata, No. 4, pp. 255-270, Pl. 1 -3. Leif Størmer (1955). "Merostomata". Part P Arthropoda 2, Chelicerata. Treatise on Invertebrate Paleontology
Mixopterus
Daniel C. (1979). "Evidence for Subaerial Activity of Euproops Danae (Merostomata, Xiphosurida)". Mazon Creek Fossils: 379–447. doi:10.1016/B978-0-12-519650-5
Paleofauna of the Mazon Creek fossil beds
Paleofauna_of_the_Mazon_Creek_fossil_beds
Extinct genus of chelicerate
LeGrande (1974). "Revision of the suborder Synziphosurina (Chelicerata, Merostomata) : with remarks on merostome phylogeny. American Museum novitates; no
Pseudoniscus
Shale known for exceptional preservation of mid-Cambrian organisms
Columbia". Evolution and morphology of the Trilobita, Trilobitoidea and Merostomata. Fossils and Strata. Vol. 4. pp. 97–136. doi:10.18261/8200049639-1975-06
Burgess Shale-type preservation
Burgess_Shale-type_preservation
Extinct superfamily of arthropods
49–61. doi:10.1080/14772011003603564. S2CID 85398946. Størmer, L 1955. Merostomata. Treatise on Invertebrate Paleontology, Part P Arthropoda 2, Chelicerata
Rhenopteroidea
Protein-coding gene in the species Homo sapiens
XP_002738479.1 55.6 627 Saccoglossus kowalevskii Atlantic Horseshoe Crab Merostomata XP_013785734.1 56.6 758 Limulus polyphemus Western Clawed Frog Amphibia
Beta-keto L-gulonate decarboxylase
Beta-keto_L-gulonate_decarboxylase
Classification of animals according to some authorities
Cheliceriformes Class Pycnogonida Order Pantopoda Class Chelicerata Subclass Merostomata Order Xiphosura Subclass Arachnida Order Acari Order Amblypygi Order
Taxonomy of the animals (Hutchins et al., 2003)
Taxonomy_of_the_animals_(Hutchins_et_al.,_2003)
Extinct superfamily of arthropods
2025 (473): 46, 60–68. doi:10.1206/0003-0090.473.1.1. Størmer, L 1955. Merostomata. Treatise on Invertebrate Paleontology, Part P Arthropoda 2, Chelicerata
Stylonuroidea
Extinct genus of sea scorpions
70–71. doi:10.1206/0003-0090.473.1.1. hdl:2246/7507. Størmer, L 1955. Merostomata. Treatise on Invertebrate Paleontology, Part P Arthropoda 2, Chelicerata
Tarsopterella
Geologic formation in Czech Republic
exquisita Metaconularia pyramidata Pseudoconularia grandissima P. nobilis Merostomata Triopus draboviensis Polychaeta Serpulites sp. Machaeridia Plumulites
Letná_Formation
Extinct genus of trilobites
"Observations on burrowing behavior in Limulus polyphemus (Chelicerata, Merostomata), with implications on the functional anatomy of trilobites". American
Trimerus
Extinct genus of arthropods
morphology and classification in stylonuroid eurypterids (Chelicerata, Merostomata), with observations on the Scottish Silurian Stylonuroidea". Earth and
Dorfopterus
Extinct genus of arthropods
Ruedemann R. (1912) "The Eurypterida of New York" Størmer, L. 1955. Merostomata. Treatise on Invertebrate Paleontology, Part P Arthropoda 2, Chelicerata
Acutiramus
Extinct genus of arthropods
(2 ed.). John Wiley & Sons. ISBN 9781118896310. Størmer, Leif (1955). "Merostomata". Treatise on Invertebrate Paleontology, Part P Arthropoda 2, Chelicerata
Paleomerus
Extinct genus of arthropods
PMC 2865068. PMID 19828493. Supplemental material. Størmer, Leif (1955). "Merostomata". Treatise on Invertebrate Paleontology, Part P Arthropoda 2, Chelicerata
Necrogammarus
Extinct family of eurypterids
1017/S0016756800068874. ISSN 1469-5081. S2CID 129056637. Størmer, L 1955. Merostomata. Treatise on Invertebrate Paleontology, Part P Arthropoda 2, Chelicerata
Slimonidae
Extinct superfamily of eurypterids
1098/rsbl.2007.0491. PMC 2412931. PMID 18029297. Størmer, Leif (1955). "Merostomata". Treatise on Invertebrate Paleontology, Part P Arthropoda 2, Chelicerata
Pterygotioidea
Genus of eurypterid
eurypterid research Chernyshev, Boris I. (1948). "New representative of Merostomata from the Lower Carboniferous". State University of Kiev, Geological Collections
Unionopterus
Extinct genus of arthropods
Journal of Paleontology 66: 885–923 Raasch, G. O. (1939). "Cambrian Merostomata". Special Paper of the Geological Society of America. 19: 1–146. v t
Cyclopites
Extinct genus of arthropods
doi:10.1017/S1755691012000072. S2CID 84151264. Størmer, Leif (1955). "Merostomata". Part P Arthropoda 2, Chelicerata. Treatise on Invertebrate Paleontology
Campylocephalus
Extinct genus of arthropods
doi:10.1098/rsbl.2007.0491. PMC 2412931. PMID 18029297. Størmer, L 1955. Merostomata. Treatise on Invertebrate Paleontology, Part P Arthropoda 2, Chelicerata
Slimonia
Extinct genus of arthropods
Bibcode:2017GeoM..154..175L. doi:10.1017/S0016756816000662. S2CID 85560431. "Merostomata, Lower Devonian, Imaigda river: Early/Lower Devonian, Russian Federation"
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MEROSTOMATA
MEROSTOMATA
MEROSTOMATA
MEROSTOMATA
MEROSTOMATA
MEROSTOMATA
MEROSTOMATA
MEROSTOMATA
MEROSTOMATA
n.
A genus of extinct Merostomata, found in Silurian rocks. Some of the species are more than three feet long.
n. pl.
Same as Merostomata.
n. pl.
A class of Arthropoda, allied to the Crustacea. It includes the trilobites, Eurypteroidea, and Limuloidea. All are extinct except the horseshoe crabs of the last group. See Limulus.
n. pl.
By some recent writers applied to the Merostomata.
n. pl.
The modern, or true, Crustacea, as distinguished from the Merostomata.
n. pl.
An extinct order of Merostomata, of which the genus Eurypterus is the type. They are found only in Paleozoic rocks.
n.
The only existing genus of Merostomata. It includes only a few species from the East Indies, and one (Limulus polyphemus) from the Atlantic coast of North America. Called also Molucca crab, king crab, horseshoe crab, and horsefoot.
n. pl.
An order of Merostomata, including among living animals the genus Limulus, with various allied fossil genera, mostly of the Carboniferous period. Called also Xiphosura.
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