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Manuel Quiring

Rare Bigotinops (cf.) dangeardi with Soft Tissues – Souss Lagerstätte, Morocco | Lower Cambrian (521–515 Ma)

* The designation (cf.) indicates close morphological similarity to Bigotinops dangeardi, based on key diagnostic features, while acknowledging minor uncertainties due to early ontogenetic stage — a standard practice in paleontological identification. This specimen was compared with the holotype and other specimens of the species found by us.

**This specimen will be featured as one of the upcoming ''Trilobite of the Month'' (TOM) selections in the large Facebook Trilobites group, continuing the tradition established by www.trilobites.info 

***See scale and details in the pictures.
High-resolution photos show scale, matrix context, soft-tissue details, and magnified views for full assessment.***


A scientifically extraordinary trilobite from the Lower Cambrian of Morocco – one of the oldest known fossils with preserved soft parts in Africa (including the oldest (!) digestive tract). A must-have for advanced collectors and researchers.


This exceptional specimen features:

• One immature Bigotinops (cf.) dangeardi, preserved as a almost complete internal mould;
• Dorsal exoskeleton with inflated cephalon and thorax, well observable pygidium and well-defined pleural spines;
• Phosphatized remains of the digestive tract clearly visible – a hallmark of Konservat-Lagerstätte preservation;
• Suspected biramous appendage near the right cranidial margin;
• Genal spine present – a characteristic not previously documented in Bigotinoids.


The highlight is a rare soft-part preservation in one of the earliest trilobite lineages – Bigotinops dangeardi – from the Souss Lagerstätte, the first Cambrian fossil lagerstätte known from Africa. With only a few specimens ever found, and this one showing partial internal anatomy, it represents a once-in-a-lifetime fossil record.


Morphology: Almost complete internal mould, dorsal exoskeleton. The axial lobe is inflated and well-defined, with conspicuous pleurae and preserved pleural spines. The cephalon displays key juvenile traits: short palpebral lobes, a distinct plectrum, and an acute glabella. The presence of a genal spine adds further scientific interest to this immature individual.


Coloration: Natural earth-toned contrast between fossil and matrix, enhanced by phosphatization of soft tissues – a rare and diagnostic feature of exceptional preservation.


Scientific Details
Species: Bigotinops dangeardi (Hupé, 1953)
Family: Bigotinidae
Superfamily: Ellipsocephaloidea
Order: Ptychopariida
Class: Trilobita
Lithostratigraphy: Upper Amouslek Formation
Age: Lower Cambrian (Series 2, Stage 3) – ca. 521–515 million years old
Biostratigraphy: Eofallotaspis Zone, Issendalenian
Locality: Tazemmourt Section, Northern slope of the Western Anti-Atlas, Morocco (Geyer et al., 2020a; Geyer & Landing, 2021)
Collection Code: #PAIS9317 | Collected: September 2019 by M. Pais, G. Geyer & I. Igerna
Upon request, we will provide the relevant scientific literature, including Geyer (2019), Geyer & Pais (2022), Geyer & Landing (2021), and others.

The Tazemmourt Section & the Souss Lagerstätte – Africa’s Cambrian Fossil Treasure:
The Tazemmourt Section is composed of lower Cambrian strata (Igoudine and Amouslek formations) and is the type locality for numerous trilobite species, many of which were first described here. It is the epicenter of the Souss Lagerstätte – the first Cambrian fossil lagerstätte known from Africa (Geyer et al., 2020a; Geyer & Landing, 2021).

Recent work has revealed that several horizons in the Daguinaspis Zone (Amouslek Formation) preserve animal remains with exceptional soft-part preservation, including muscles, appendages, and phosphatized digestive tracts. This Konservat-Lagerstätte-type preservation is exceptionally rare and provides a unique window into early arthropod anatomy.

The fossil sequence at Tazemmourt forms the basis for biostratigraphic subdivisions in the West Gondwana paleocontinent and is globally significant. Fossils from this site are held in international museum collections and continue to reshape our understanding of the Cambrian explosion. This specimen was collected at this world-renowned geotope and represents a scientifically significant piece of evolutionary history.


Determination & Morphological Features
This specimen shows key diagnostic traits consistent with Bigotinops dangeardi:

• Immature, almost complete, inflated internal mould;
• Cephalon typical of immature individuals: distinct plectrum in front of the glabella, palpebral lobes relatively short, posterior tips not reaching the posterior border furrow;
• Complete thorax on right and left lobes;
• Observable pygidium;
• Frontal lobe narrower than those behind, giving the glabella an acute aspect;
• Interocular areas similar to a slightly extended quarter segment of a circle;
• Very conspicuous pleurae with evident, well-preserved pleural spines; axial furrows less evident, likely due to preservation;
• Anterior border more or less evenly curved;
• Ovoid body outline.

About Bigotinops dangeardi: as G. Geyer noted in 2019, "Only one specimen is known from Hupé's original publications." Very few have been found since. This makes every new discovery scientifically significant.

The Bigotinidae family — including Hupetina, Bigotina, and Bigotinops — belongs to the earliest and least understood trilobite lineages. Their sudden appearance “out of nowhere” in the Moroccan Anti-Atlas (and Siberia!) remains one of the biggest puzzles in trilobite evolution (Geyer & Pais, in prep.). This specimen is one of the stars from the Tazemmourt Section – some of the oldest trilobites on Earth with preserved soft tissues.


Dimensions & Condition
Specimen size: 0,8 × 0.5 cm
Matrix size: 8.5 × 6.5 cm
Weight: 132 g
Restoration: Untouched plate – 100% natural, no restoration.


Shipping & Credits
Worldwide registered shipping with tracking number.
All images and text credits to Miguel Caldeira Pais – use only with prior permission via direct message.
For more on the Souss Lagerstätte, Bigotinidae trilobites, and our full collection, visit:
www.mediterranic.com | www.cambrian521.com
About Bigotinidae: www.mediterranic.com/Souss-Lagerst%C3%A4tte-site/Trilobites/Family-Bigotinidae


Questions?
We’re happy to help. Contact us for additional photos, details, or scientific references.
Check our feedback, publications, and other exceptional fossils at www.mediterranic.com


Why This Stands Out?
• Rare soft-part preservation – one of the oldest in Africa
• Phosphatized digestive tract clearly visible
• Extreme rarity – only a few specimens of Bigotinops dangeardi ever found
• Collected by leading experts (G. Geyer & M.C. Pais) – fully documented provenance
• From the Tazemmourt Section – type locality of the Souss Lagerstätte
• Museum-grade specimen at a fair reserve price


Don’t miss this opportunity to own a true milestone in early arthropod evolution.


Collector’s Note
Fossils – especially scarce, scientifically significant specimens like this one – are increasingly recognised not only as natural works of art but also as long-term investment assets, with values steadily appreciating over time. This piece combines scientific rarity, aesthetic elegance, and provenance, making it a top-tier addition to any elite collection.


Happy bidding from the Mediterranic team – may the right collector win!

Cambriano, Série 2 (521 - 509 milhões de anos) - Marrocos

Bigotinops dangeardi extremamente raro com tecidos moles. Trilobita fóssil. Cambriano. - Animal fossilizado - Cambrian Souss Lagerstätte of the Anti-Mountains. Morocco. - 0,8 cm

Fósseis

Preço de reserva

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Comprar agora

Data de fim

sábado

domingo

hoje

amanhã

segunda-feira

Orçamento

Até

Localização

Itália

Holanda

França

Espanha

Estados Unidos

Alemanha

Lituânia

Taiwan

Hong Kong

Polônia

Reino Unido

Portugal

Bélgica

Romênia

Dinamarca

Grécia

Suécia

Turquia

Áustria

Bulgária

Suíça

Finlândia

Luxemburgo

Cingapura

Dimensões

Altura

Largura

Profundidade

Objeto

Dente fóssil

Animal fossilizado

Âmbar

Dentes fósseis

Esqueleto fóssil

Matriz fóssil

Garra fossilizada

Concha fossilizada

Matriz de fóssil

Osso fóssil

Planta fossilizada

Crânio fóssil

Fragmento fóssil

Maxilar fossilizado

Cabochão fóssil

Carapaça fóssil

Vértebra fóssil

Montagem de réplica de taxidermia

Pedras metafísicas

Ovo fossilizado

Madeira fossilizada

Esqueleto reconstruído

Molar fóssil

Amostra fóssil com vários espécimes

Mineral em bruto

País de origem

Marrocos

Madagáscar

Indonésia

América do Norte

Birmânia

China

Ásia

Líbano

Polónia

Rússia

Estados Bálticos

África

Canadá

República Dominicana

Austrália

Brasil

Material

Prata

Resina

Calcita preta

Banhado a ouro

Género

Senhora

Unissexo

Estado

Natural

Restaurado

Melhorado

Bom estado

Reconstruído

Remontado

Composto

Manipulado

Novo

Como novo - não foi utilizado

Gesso

Excelente estado

Excelente estado - muito pouco utilizado - com sinais mínimos de desgaste

Esculpido à mão

Bom estado - usado com pequenos sinais de envelhecimento e manchas

Pequenos danos

Bom estado - foi utilizado - com alguns sinais de desgaste

Excelente estado - muito pouco usado com sinais mínimos de envelhecimento e desgaste

Boas condições

Muito bom +

Período

Cretáceo (145 - 66 milhões de anos)

Neogeno, Mioceno (23,03 - 5,33 milhões de anos)

Cretáceo, Superior (100,5 - 66 milhões de anos)

Paleogeno, Eoceno (56 - 33,9 milhões de anos)

Devoniano (419,2 - 358,9 milhões de anos)

Neogeno (23,03 - 2,58 milhões de anos)

Quaternário, Pleistoceno (2,58 - 0,0117 milhões de anos)

Cretáceo, Inferior (145 - 100,5 milhões de anos)

Jurássico, Inferior (201,3 - 174,1 milhões de anos)

Jurássico, Superior (163,5 - 145 milhões de anos)

Jurássico (201,3 - 145 milhões de anos)

Triássico (251,9 - 201,3 milhões de anos)

Ordoviciano (485,4 - 443,8 milhões de anos)

Triássico, Inferior (251,9 - 247,2 milhões de anos)

Cambriano, Série 2 (521 - 509 milhões de anos)

Devoniano, Médio (393,3 - 382,7 milhões de anos)

Cambriano (541 - 485,4 milhões de anos)

Jurássico, Médio (174,1 - 163,5 milhões de anos)

Carbonífero, Pensilvaniano (323,2 - 298,9 milhões de anos)

Triássico, Médio (247,2 - 237 milhões de anos)

Quaternário (2,58 - 0 milhões de anos)

Carbonífero (358,9 - 298,9 milhões de anos)

Paleogeno (66 - 23,03 milhões de anos)

Cenozoico (66 - 0 milhões de anos)

Triássico, Superior (237 - 201,3 milhões de anos)

Pedra

Coral cor de sangue

Coral

Ónix.

Topázio

Ametista

Turquesa

Jade

Certificação

Sem relatório de um laboratório

Estilo

Paleolítico

Assinatura

Não assinado

Corte

Corte facetado

Oval

Corte cabochão

Redondo

Mineral

Forma mineral

Forma livre

Esfera

Tamanho no artigo

57 (EU) / 17 (IT) / 8 (EUA)

56 (EU) / 16 (IT) / 7 ½ (EUA)

Cultura

Berbere

Depois de 2000

Antes de 1400

1900-2000

Tratamento

Conservada

Polida

Compósito

Original/Réplica

Original/oficial

Original recondicionada

Reprodução/réplica

Réplica com licença

Espécime

Fósseis

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Bigotinops dangeardi extremamente raro com tecidos moles. Trilobita fóssil. Cambriano. - Animal fossilizado - Cambrian Souss Lagerstätte of the Anti-Mountains. Morocco. - 0,8 cm

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