mesosoma

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mesosoma

arachnid anatomy

Learn about this topic in these articles:

arachnid structures

In arachnid: External features
…abdomen is subdivided into the mesosoma, or preabdomen, and the metasoma, or postabdomen, which is mobile and more slender. Similar arrangements are found among whip scorpions, schizomids, and ricinuleids. Among the daddy longlegs the division between the two parts is indistinct, and among most of the mites and ticks the…
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scorpions

In scorpion: External features
The mesosoma has seven segments. The first (pregenital) segment is reduced and bears the sternum, while the second (genital) bears the ventral gonopore, which is covered. The unique comblike pectines arise from the genital segment. A pair of book lungs are found on the ventral side…
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