Scyllarides

Lore & Background

The taxonomic history of Scyllarides began in 1849 when Wilhem de Haan divided the genus Scyllarus into two genera, Scyllarus and Arctus, but made the error of including the type species of Scyllarus in the genus Arctus. This was first recognised by the ichthyologist Theodore Gill in 1898, who synonymised Arctus with Scyllarus and erected a new genus Scyllarides to hold the species that De Haan had placed in Scyllarus.

Scyllarides is distinguished from the only other genus in the subfamily, Arctides, by having a less sculptured carapace, lacking an extra spine behind each eye, and lacking a transverse groove on the first segment of the abdomen. Three species of Scyllarides (S. astori, S. haanii, and S. squammosus) have been described in the North Pacific, though DNA barcoding and morphological studies on phyllosoma larvae collected in the western and central North Pacific suggested the existence of cryptic species.

The genus comprises 14 extant species and two extinct species known from the Eocene of Europe.

Reader's Guide

Scyllarides holds significance as a distinct genus within the slipper lobster family, resolved from earlier taxonomic confusion. Its placement in the subfamily Arctidinae, alongside Arctides, highlights key morphological traits such as multiarticulated exopods on all three maxillipeds and a three-segmented mandibular palp. The genus's taxonomic history, involving the correction of Wilhem de Haan's 1849 error by Theodore Gill in 1898, illustrates the refinement of decapod classification. The presence of cryptic species in the North Pacific, suggested by DNA barcoding and larval studies, indicates that species diversity may be underestimated. The fossil record from the Eocene of Europe provides a temporal dimension to the genus's legacy. The 14 extant species and two extinct species collectively represent a lineage that has persisted through significant geological and ecological changes, contributing to the broader understanding of slipper lobster evolution and biogeography.

Did You Know?

• Scyllarides is placed in the subfamily Arctidinae, which has multiarticulated exopods on all three maxillipeds.
• The genus was erected by ichthyologist Theodore Gill in 1898 to correct an error by Wilhem de Haan.
• Three North Pacific species (S. astori, S. haanii, and S. squammosus) may include cryptic species based on DNA barcoding.
• Two extinct species of Scyllarides are known from the Eocene of Europe.