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PLECTORTHIDAE [1 record]

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Record 1 1977-06-23

English

Subject field(s)
  • Paleontology
OBS

[Brachiopods of the] family Plectorthidae [have] interareas and hinge lines of variable length, [the] delthyrium and [the] notothyrium [are] open; [the] teeth [have] oblique fossettes [and are] supported by strong dental plates extending anteriorly, [the] ventral muscle field [is] variable but commonly elongately cordate; [the] cardinal process [is] almost invariably present and differentiated into [a] crenulated myophore and shaft in adult shells; brachiophore bases [are] either convergent onto [the] floor of [the] brachial valve near [the] junction of [the] cardinal process and [the] median ridge dividing quadripartite adductor scars and ankylosed to concave fulcral plates, or rarely divergent and replacing [the] fulcral plates; [the] ventral and dorsal mantle canal systems [are] saccate. L. Ord. - U. Sil.

French

Domaine(s)
  • Paléontologie
OBS

[Les Brachiopodes de la] famille des Plectorthidae(...) [ont un] processus cardinal simple et [un] myophore crénelé. [Le] delthyrium et [le] notothyrium [sont] ouverts.

Spanish

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