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Evolution: Velvet Worm Biogeography.

Martin R Smith¹

¹Department of Earth Sciences, Durham University, Mountjoy Site, Durham DH1 3LE, UK.

Current Biology : CB

|October 12, 2016

Summary

This summary is machine-generated.

New fossil discoveries reveal how velvet worms (Onychophora) colonized Southeast Asia. This finding explains the surprising distribution of this ancient lineage, which otherwise aligns with the supercontinent Gondwana.

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Area of Science:

Paleontology
Zoology
Evolutionary Biology

Background:

The current distribution of velvet worms (Onychophora) largely mirrors the ancient supercontinent Gondwana.
A notable exception is an isolated population in Southeast Asia, posing an evolutionary puzzle.

Purpose of the Study:

To investigate the origin and dispersal of peripatid onychophorans in Southeast Asia.
To establish the timeline and mechanisms of colonization for this isolated velvet worm population.

Main Methods:

Analysis of newly discovered fossil material from Southeast Asia.
Comparative morphological and phylogenetic analyses of fossil and extant velvet worms.

Main Results:

The fossil evidence provides a temporal framework for the arrival of velvet worms in Southeast Asia.
New insights into the dispersal routes and evolutionary history of peripatid onychophorans have been established.

Conclusions:

The study resolves the biogeographical anomaly of Southeast Asian velvet worms.
Fossil discoveries illuminate the ancient history and dispersal patterns of Onychophora, linking them to Gondwanan origins.