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Dignomia munsterii

Lingulata - Lingulida - Lingulidae

Lingula munsterii was named by d’Orbigny (1842). It is not a trace fossil.

It was recombined as Dignomia munsterii by Emig and Herrera (2006).

Synonymy list
YearName and author
1842Lingula munsterii d’Orbigny
1912Lingula lineata Hoek in Streinman & Hoek p. 232
1996Dignomia boliviana Emig
2006Dignomia munsterii Emig and Herrera p. 233

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EubilateriaAx 1987
phylumBrachiopodaCuvier 1805
subphylumLinguliformeaWilliams et al. 1996
classLingulataGorjansky and Popov 1985
orderLingulidaWaagen 1885
superfamilyLinguloideaMenke 1828
familyLingulidaeGray 1840
genusDignomiaHall 1871
speciesmunsterii(d’Orbigny 1842)

If no rank is listed, the taxon is considered an unranked clade in modern classifications. Ranks may be repeated or presented in the wrong order because authors working on different parts of the classification may disagree about how to rank taxa.

C. C. Emig and Z. Herrera 2006The outline of the shell is an elongate oval. Two large medio-lateral grooves, longitudinally striated, extend from the umbonal region to the anterior margin of the valves; a median groove is narrow. On the outer surface of the dorsal valve is a median groove that occupies its whole length. On the ventral valve, the groove extends from the anterior margin to about the half to two-thirds of the length. Anterior margin straight, without indentation at the level of the grooves. Lateral margins subparallel; width of the shell largest at or above the middle; surface smooth with numerous weak, occasionally well marked, growth lines. Umbonal region rounded on dorsal valve, pointed on ventral valve. Small proparea slightly curved with a weak pedicle groove, continuous with internal valve side. The ventral lophophoral cavity occupies approximately 36% of the length of the valve. Mantle canals curved. A pair of narrow subparallel, V-shaped, grooves extend from the anterior adductor scars to the unpaired posterior adductor scars; three long oblique internal muscles; a V-shaped perimial line. No internal observation of dorsal valve.