RARE Psiloceras (Curviceras) subangulare Fossil Ammonite | Lower Hettangian Jurassic Tübingen Germany | Authentic Specimen

Description

This listing features a RARE and scientifically important fossil ammonite: Psiloceras (Curviceras) subangulare, from the Lower Hettangian of the Early Jurassic, collected near Tübingen, Germany. This ammonite is of particular paleontological value as it represents one of the earliest post-extinction genera to appear following the end-Triassic mass extinction.

Geological & Taxonomic Information:

• Fossil Type: Ammonite (extinct marine cephalopod)
• Genus & Subgenus: Psiloceras (Curviceras)
• Species: subangulare
• Order: Ammonitida
• Superfamily: Psiloceratoidea
• Family: Psiloceratidae
• Geological Stage: Lower Hettangian, Jurassic
• Age: Approximately 201.3 to 199.3 million years ago
• Formation: Likely within the Schwarzer Jura Group
• Location: Near Tübingen, Baden-Württemberg, Germany
• Depositional Environment: Shallow marine shelf environment; mudstone-dominated sequences representing early Jurassic transgressive seas

Stratigraphic & Scientific Significance: Psiloceras subangulare is among the earliest ammonite species used in defining the base of the Jurassic period. Its presence is closely linked to the Psiloceras planorbis Zone in the standard ammonite biostratigraphic scale of northwestern Europe. Although precise zonal data for subangulare may be debated, it belongs to the lower Hettangian ammonite assemblages that are crucial in post-extinction faunal studies.

Morphological Features:

• Smooth shell lacking prominent ribbing (typical of Psiloceratids)
• Gently involute coiling with a moderately depressed whorl section
• Subangular venter
• Simple suture lines and smooth ornamentation indicative of early Jurassic taxa

Notable Information: The genus Psiloceras is widely acknowledged as among the first true ammonites of the Jurassic period. Curviceras is a subgenus characterized by slight curvature in shell growth, giving it a subtle distinction from typical Psiloceras species. Fossils from this early stage are uncommon and represent pivotal taxa in Jurassic ammonite evolution.

Specimen Information:

• Fossil Origin: Tübingen, Germany
• Scale: Scale rule squares/cube = 1cm. Please refer to the photo for full sizing.
• Condition: Authentic, stable, and well-preserved fossil ammonite
• Photo: The pictured specimen is exactly the one you will receive

Certification & Authenticity: All of our fossils are 100% genuine and come with a Certificate of Authenticity. Each piece is hand-selected for scientific accuracy, preservation quality, and natural appeal.

This Psiloceras (Curviceras) subangulare is a rare and important ammonite from the earliest Jurassic seas—an ideal specimen for collectors, educators, or anyone with a passion for Earth’s prehistoric past.