Perledo (MCSM collection) (Triassic of Italy)

Where: Italy (46.0° N, 9.3° E: paleocoordinates 8.9° N, 20.5° E)

• coordinate based on nearby landmark

• local area-level geographic resolution

When: Perledo Member (Perledo-Varenna Formation), Longobardian (242.0 - 235.0 Ma)

• The precise age of these historical fossil collections from Perledo cannot be determined unequivocally today because precise stratigraphic and locality data are lacking. Tintori et al. (1985) noted that most of the historical fossil material appears to have been collected in the surroundings of the village of Perledo (i.e. in the upper part of the Calcare di Perledo, recognized as the Perledo Member of the Perledo-Varenna Formation, of upper Ladinian age (Gaetani et al. 1992).

• group of beds-level stratigraphic resolution

Environment/lithology: marine; lithified limestone

Size class: macrofossils

Preservation: adpression

Collection methods: Repository: Museo Civico di Milano (MCSM, e.g. Stoppani collection). Material described by Bellotti, but much of it was destroyed during the Second World War.

Primary reference: G. de Alessandri. 1910. Studii sui pesci Triasici della Lombardia. Memorie della Societa Italiana di Scienze Naturali e del Museo Civico di Storia Naturale di Milano 7(1):1-145 [M. Clapham/M. Clapham]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 153401: authorized by Matthew Clapham, entered by Matthew Clapham on 14.12.2013

Creative Commons license: CC BY (attribution)

Taxonomic list

Lepidotus pectoralis n. sp. Bellotti 1857
One specimen in Bellotti, 1857 and additional examined by Bassani (coll. 1872, 1873)
 Saurichthyiformes - Saurichthyidae
"Belonorhynchus robustus" = Saurichthys macrocephalus
"Belonorhynchus robustus" = Saurichthys macrocephalus Deecke 1889
MCSM 652, 866, 649, 867; listed as nomen nudum in Bellotti's 1873 catalog
 Perleidiformes - Colobodontidae
Colobodus sp. Agassiz 1843
 Perleidiformes - Perleididae
"Pholidophorus oblongus n. sp." = Perleidus altolepis, "Lepidotus serratus n. sp." = Perleidus altolepis, "Heterolepidotus bellottii" = Ctenognathichthys bellottii
"Pholidophorus oblongus n. sp." = Perleidus altolepis Deecke 1889
Bellotti had a single specimen, but more acquired later from Stoppani and other colls (Alessandri, 1910)
"Lepidotus serratus n. sp." = Perleidus altolepis Deecke 1889
"Heterolepidotus bellottii" = Ctenognathichthys bellottii de Alessandri 1910
 Prohaleciteiformes - Prohaleciteidae
"Pholidophorus porro n. sp." = Prohalecites porroi
"Pholidophorus porro n. sp." = Prohalecites porroi Bellotti 1857
 Leptolepidiformes - Leptolepididae
? Leptolepis sp. Agassiz 1843
 Ionoscopiformes - Furidae
Semionotus balsami n. sp. Bellotti 1857
Bellotti had several specimens, and additional "many specimens" (including one purchased 1874) in Alessandri, 1910 (which actually represent different species; Tintori & Lombardo, 2007)
Heterolepidotus taramellii n. sp. de Alessandri 1910
determined as Semionotus intermis by Bellotti but not published
Eugnathus hermesi n. sp. de Alessandri 1910
coll. Enrico Vigoni 1868 (nomen nudum in Bellotti catalog)
Pholidophorus lepturus n. sp., Ophiopsis lariensis n. sp., Semionotus brevis n. sp., "Urolepis macroptera n. sp." = Aneurolepis macroptera, "Urolepis elongatus n. sp." = Aneurolepis macroptera, "Urolepis microlepidota n. sp." = Aneurolepis macroptera, Pholidophorus rueppelli n. sp.
Pholidophorus lepturus n. sp. Bellotti 1857
Ophiopsis lariensis n. sp. de Alessandri 1910
Part of Pholidophorus rueppeli in Bellotti, 1857
Semionotus brevis n. sp. Bellotti 1857
counterpart in Stoppani collection, now at MCSM (fide Alessandri 1910)
"Urolepis macroptera n. sp." = Aneurolepis macroptera Bellotti 1857
Stoppani collection at MCSM
"Urolepis elongatus n. sp." = Aneurolepis macroptera Bellotti 1857
"Urolepis microlepidota n. sp." = Aneurolepis macroptera Bellotti 1857
2 in MCSM Stoppani coll. (from Alessandri 1910)
Pholidophorus rueppelli n. sp. Bellotti 1857
Heptanema paradoxum n. sp. Bellotti 1857 lobe-finned fish