Leptaena aequalis Amsden 1974 (lamp shell)

Strophomenata - Strophomenida - Rafinesquinidae

Full reference: T. W. Amsden. 1974. Late Ordovician and Early Silurian articulate brachiopods from Oklahoma, southwestern Illinois, and eastern Missouri. Bulletin - Oklahoma Geological Survey 119:1-154

Belongs to Leptaena according to T. W. Amsden 1974

Sister taxa: Leptaena (Leptaena), Leptaena (Ygdrasilomena), Leptaena acuticuspidata, Leptaena alliku, Leptaena amelia, Leptaena analogaeformis, Leptaena arberae, Leptaena argentina, Leptaena borghiana, Leptaena boyaca, Leptaena contermina, Leptaena convexa, Leptaena cooperi, Leptaena croma, Leptaena crypta, Leptaena cryptoides, Leptaena dejecta, Leptaena delicata, Leptaena electra, Leptaena ennessbe, Leptaena gibbosa, Leptaena holcrofti, Leptaena indigena, Leptaena ingrica, Leptaena kentuckiana, Leptaena lappa, Leptaena lappina, Leptaena lemniscata, Leptaena limbifera, Leptaena minuta, Leptaena moniquensis, Leptaena nanaformis, Leptaena nassichuki, Leptaena odeon, Leptaena oklahomensis, Leptaena orhor, Leptaena parvirugata, Leptaena parvissima, Leptaena paucirugata, Leptaena poulseni, Leptaena praequalis, Leptaena provellerosa, Leptaena purpurea, Leptaena quadrata, Leptaena rara, Leptaena rhomboidalis, Leptaena richmondensis, Leptaena rugaurita, Leptaena rugosa, Leptaena salopiensis, Leptaena semiradiata, Leptaena sperion, Leptaena tenuissimestriata, Leptaena valida, Leptaena veldrensis, Leptaena vellerosa, Leptaena ventricosa, Leptaena ventricosa, Leptaena wesenbergensis, Leptaena zeta, Leptaena ziegleri, Similoleptaena planitia, Similoleptaena pertenuis, Similoleptaena friedrichi, Similoleptaena crassorugata, Similoleptaena undosa, Similoleptaena tarwanpensis, Kurnamena acuta, Kurnamena spumifera, Kurnamena palmrei, Kurnamena rugosoides, Kurnamena laterorugata, Kurnamena taxilla, Leptaenopoma trifidium, Orhoria lappina, Orhoria lappa

Type specimen: OU 6795. Its type locality is Locality U. Blue Shawnee Creek, east of New Wells, which is in a Gamachian reef, buildup or bioherm limestone in the Leemon Formation of Missouri.

Ecology: stationary epifaunal suspension feeder

Distribution:

• Silurian of Mongolia (1 collection)

• Ordovician of United States (2: Illinois, Missouri)

Total: 3 collections each including a single occurrence

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Specimen images are retrieved through the ePANDDA API.


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