FB2025_05 , released December 11, 2025

General Information
Term	preepisternum	ID (Ontology)	FBbt:00004555 (Fly Anatomy)
Definition	Anterior and major portion of the thoracic episternum.[ FlyBase:FBrf0037040 FlyBase:FBrf0068392 FlyBase:FBrf0111704 ]
Comment	Accordingly to McAlpine (1981) the term mesothoracic preepisternum is used incorrectly (as by Snodgrass, 1935) and it should be referred to as katepisternum. In addition the mesothoracic katepisternum is frequently, but incorrectly called the sternopleuron (as in Steiner, 1976). Although in Diptera the mesosternum is greatly reduced and internalized, it is not fused with the katepisternum, and thus the latter should not be called sternopleuron. However, it seems that most publications still use the term sternopleuron (or sternopleurite) to refer to the katepisternum or preepisternum - https://orcid.org/0000-0001-5948-3092.
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General Information

Term

preepisternum

ID (Ontology)

FBbt:00004555 (Fly Anatomy)

Definition

Anterior and major portion of the thoracic episternum.[ FlyBase:FBrf0037040 FlyBase:FBrf0068392 FlyBase:FBrf0111704 ]

Comment

Accordingly to McAlpine (1981) the term mesothoracic preepisternum is used incorrectly (as by Snodgrass, 1935) and it should be referred to as katepisternum. In addition the mesothoracic katepisternum is frequently, but incorrectly called the sternopleuron (as in Steiner, 1976). Although in Diptera the mesosternum is greatly reduced and internalized, it is not fused with the katepisternum, and thus the latter should not be called sternopleuron. However, it seems that most publications still use the term sternopleuron (or sternopleurite) to refer to the katepisternum or preepisternum - https://orcid.org/0000-0001-5948-3092.

Links to External Ontologies

Annotations

Records annotated with this term OR any of its CHILD TERMS

Full annotation statements including this term (annotations to child terms are NOT included), and relevant FlyBase records

No relevant statements available

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Relationships
Is a	sclerite
Part of	episternum
Synonyms & Secondary IDs
Synonyms

Secondary IDs

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Relationships

Is a

sclerite

Part of

episternum

Synonyms & Secondary IDs

Synonyms

Secondary IDs

External Crossreferences & Linkouts