Maiocercus celticus

Overview

Maiocercus celticus is a Late Carboniferous arachnid whose rear body is broader than its front body. The Crock Hey specimen preserves connections between the body and appendages. Its broad outline and the positions of small appendages can be explored together.^[1]

Key facts

One pedipalp is folded beneath the body, the other is detached, and the chelicerae are spread. Researchers considered these conditions when discussing the possibility that the fossil was a shed exoskeleton. This is an intriguing case of asking whether a fossil preserves the animal itself or its molt.^[1]

Time and place

It is known through morphological and taxonomic research on Late Carboniferous specimens. The entire Carboniferous spanned approximately 360–300 million years ago. The Crock Hey specimen was scanned tomographically to examine connections between the body and appendages.^[1][2]

The time range describes source context, not the complete duration of this species.

Size, form and skeleton

A narrow front body connects to a broader rear body, with appendages attached close to the body. Four pairs of walking legs are distinguished from separate pedipalps. The overall outline and the different positions of appendages can be examined separately.^[1]

Habitat and reproduction

What traces might a small arachnid leave as it grows? Folded or detached appendages in the Crock Hey specimen provided clues for discussing the shed-exoskeleton hypothesis. Examining a preserved posture raises questions about how the fossil formed.^[1]

Fossil discovery

Researchers used X-ray tomography to examine the Crock Hey specimen. They could read appendage connections alongside the broad body visible from outside. This study looked into a small fossil from a new perspective.^[1]

References

1. Morphology and systematics of Anthracomartidae (Arachnida: Trigonotarbida)
2. International Commission on Stratigraphy (2024) — Geological time chart
3. Study — Microtomography of Eophrynus
4. International Commission on Stratigraphy (2024) — Geological time chart
5. Study — Morphology of Maiocercus and related arachnids
6. International Commission on Stratigraphy (2024) — Geological time chart

Research questions

Do folded appendages show a posture in life or the appearance of a shed exoskeleton? The study compared the conditions of several structures to discuss possibilities. A question beginning with one unusual position was connected to the overall state of preservation.^[1]

Observation

First compare the narrow front body and broad rear body. Move your gaze to the walking legs and separate pedipalps around it to locate different appendages within the broad outline.^[1]