Mycteroptidae

Mycteroptidae
Temporal range: Late Carboniferous-Late Permian, 320–254 Ma
Reconstruction of Megarachne servinei.
Scientific classification Edit this classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Arthropoda
Subphylum: Chelicerata
Order: †Eurypterida
Suborder: †Stylonurina
Superfamily: †Mycteropoidea
Family: †Mycteroptidae
Cope, 1886
Type genus
Mycterops
Cope, 1886
Genera
Synonyms
  • Woodwardopteridae
    Kjellesvig-Waering, 1959

Mycteroptidae are a family of eurypterids, a group of extinct chelicerate arthropods commonly known as "sea scorpions". The family is one of three families contained in the superfamily Mycteropoidea (along with Hibbertopteridae and Drepanopteridae), which in turn is one of four superfamilies classified as part of the suborder Stylonurina.

Mycteroptids were sweep-feeding eurypterids known from the Late Carboniferous[1] to the Late Permian.[2]

Description

Mycteroptids were medium-sized to fairly large mycteropoids with parabolic prosoma and a hastate telson with paired ventral keels. They had a culticular ornament of scales or mucrones and unlike the hibbertopterids, appendage IV was non-spiniferous. The first and second opisthosomal tergites were strongly developed and elongated.[1] The heads of mycteroptids were subtrapezoid in shape with small compound eyes.[3]

Mycteroptids only used appendages II and III to capture prey, whilst hibberopterids used II, III and IV.[1]

Genera and species

Three of the four genera included in the Mycteroptidae, Mycterops, Woodwardopterus and Megarachne might represent different ontogenetic stages of each other based on the sizes of the referred specimens and the patterns of mucronation. This would sink the genera Woodwardopterus and Megarachne into Mycterops.[1]

Family Mycteroptidae Cope, 1886

See also

References

  1. ^ a b c d James C. Lamsdell, Simon J. Braddy & O. Erik Tetlie (2010). "The systematics and phylogeny of the Stylonurina (Arthropoda: Chelicerata: Eurypterida)". Journal of Systematic Palaeontology. 8 (1): 49–61. doi:10.1080/14772011003603564. S2CID 85398946.
  2. ^ Poschmann, Markus J.; Rozefelds, Andrew (2021). "The last eurypterid – a southern high-latitude record of sweep-feeding sea scorpion from Australia constrains the timing of their extinction". Historical Biology. 33 (12): 121–138. doi:10.1080/08912963.2021.1998033. S2CID 252467508.
  3. ^ Størmer, L 1955. Merostomata. Treatise on Invertebrate Paleontology, Part P Arthropoda 2, Chelicerata, P39.


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