Higginsium includes 5 children:
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Higginsium cataphractum (Higgins 1961) Sánchez, Yamasaki, Pardos, Sørensen & Martínez 2016
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Higginsium dolichurum (Sánchez, Pardos, Herranz & Benito 2011) Sánchez, Yamasaki, Pardos, Sørensen & Martínez 2016
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Higginsium erismatum (Higgins 1983) Sánchez, Yamasaki, Pardos, Sørensen & Martínez 2016
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Higginsium mazatlanensis Cepeda, Álvarez-Castillo, Hermosos-Salazar, Sánchez, Gómez & Pardos 2019
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Higginsium trisetosum (Higgins 1983) Sánchez, Yamasaki, Pardos, Sørensen & Martínez 2016
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