Conasprella sieboldii

{{Short description|Species of gastropod}}

{{Use dmy dates|date=May 2020}}

{{Speciesbox

| taxon = Conasprella sieboldii

| image =Conus sieboldii 1.jpg

| image_caption =Apertural and abapertural views of shell of Conasprella sieboldii (Reeve, L.A., 1848)

| authority = (Reeve, 1848)

| synonyms_ref = Bouchet, P. (2015). Conasprella sieboldii (Reeve, 1848). In: MolluscaBase (2015). Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=835345 on 2015-06-20

| synonyms =

• Conasprella (Endemoconus) sieboldii (Reeve, 1848) · accepted, alternate representation
• Conus petricosus Azuma, 1961
• Conus rarimaculatus G. B. Sowerby II, 1870
• Conus sieboldii Reeve, 1848 (original combination)
• Conus sieboldii petricosus (f) ^{Azuma, M., 1961}
• Endemoconus sieboldii (Reeve, 1848)
• Yeddoconus sieboldii (Reeve, 1848)

| display_parents = 3

}}

Conasprella sieboldii, common name Siebold's cone, is a species of sea snail, a marine gastropod mollusk in the family Conidae, the cone snails and their allies.

Like all species within the genus Conasprella, these cone snails are predatory and venomous. They are capable of stinging humans, therefore live ones should be handled carefully or not at all.