Harman Patil (Editor)

Megalograptidae

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Kingdom
  
Animalia

Subphylum
  
Chelicerata

Suborder
  
†Eurypterina

Higher classification
  
Eurypterid

Phylum
  
Arthropoda

Order
  
†Eurypterida

Superfamily
  
†Megalograptoidea

Rank
  
Family

Similar
  
Eurypterid, Arthropod, Chelicerata, Mixopteridae, Stylonuridae

Megalograptidae is an extinct family of eurypterids.

Contents

Description

Megalograptids are characterized by large exoskeletons with ovate to triangular scales. The prosoma (head) is subquadrate, with a tonguelike anterior process bearing marginal spines, and compound eyes on the top front of the head. The chelicerae (claws in front of the mouth) are small and short. The first and third pairs of walking legs are short, with diverging or closely spaced spines. The second pair of walking legs is enormously developed, with long paired spines. The fourth pair of walking legs are nearly spineless. The preabdomen, the front portion of the body, is narrow with axial furrows, while the postabdomen is moderately narrow with broad, flat and curved appendages on the last body segment. The telson is short and lanceolate.

Genera

  • Class Merostomata Dana, 1852
  • Order Eurypterida Burmeister, 1843
  • Suborder Eurypterina Burmeister, 1845
  • Superfamily Megalograptoidea Caster & Kjellesvig-Waering, 1955Family Megalograptidae Caster & Kjellesvig-Waering, 1955Genus Megalograptus Miller, 1874Megalograptus alveolatus (Shuler, 1915)Megalograptus ohioensis Caster & Kjellesvig-Waering, 1955Megalograptus shideleri Caster & Kjellesvig-Waering, 1964Megalograptus welchi Miller, 1874Megalograptus williamsae Caster & Kjellesvig-Waering, 1964Genus Echinognathus Walcott, 1882Echinognathus clevelandi Walcott, 1882Genus Pentecopterus Lamsdell, James C et al., 2015Pentecopterus decorahensis Lamsdell, James C et al., 2015

    • References

    Megalograptidae Wikipedia
    (Text) CC BY-SA


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