Bulletin - United States... www.alamy.com

Shell-morphology-of-2-speci... www.researchgate.net

Acasta_spongites_4142a.JPG en.wikipedia.org

Acasta hi-res stock... www.alamy.com

Acasta hi-res stock... www.alamy.com

136 Henry augustus pilsbry,... jenikirbyhistory.getarchive...

Diversity | Free Full-Text... www.mdpi.com

Spongites hi-res stock... www.alamy.com

Acasta vivicava sp. nov.,... www.researchgate.net

Figure 10 from STUDIES ON... www.semanticscholar.org

Full article: The complete... www.tandfonline.com

Acasta www.mindat.org

Figure 10 from STUDIES ON... www.semanticscholar.org

136 Henry augustus pilsbry,... jenikirbyhistory.getarchive...

Acasta vivicava sp. nov.,... www.researchgate.net

Diversity | Free Full-Text... www.mdpi.com

Acasta www.mindat.org

Invert-E-Base Portal -... www.invertebase.org

DNA-based diversity... peerj.com

136 Henry augustus pilsbry,... jenikirbyhistory.getarchive...