1.1. Taxonomic history of Metasarcidae

2.1. Material examined

2.2. Abbreviations

2.3. Description and figures

2.4. Outgroups

2.5. Ingroup

2.6. Molecular data acquisition

2.7. Morphological data analysis

2.8. Phylogenetic inferences

2.9. Optimization of morphological characters and node support metric

3.1. Molecular and morphological data

3.2. List of morphological characters

3.3. Phylogenetic results

3.4. Identification key to males of genera of the Metasarcidae

3.5. Identification key to males of Ayacucho

3.6. Identification key to males of Incasarcus

3.7. Identification key to males of Metasarcus

3.8. Identification key to males of Tschaidicancha

4.1. Phylogenetic inference

4.2. The monophyly and biodiversity of Metasarcidae

4.3. Taxonomy and systematics of Metasarcidae genera