Ptychopariida

Leptoplastides salteri

Order Ptychopariida / Suborder Olenina / Family Olenidae

Tremadocian (Early Ordovician)UK

Leptoplastides salteri — photo 1 — Photo 1 · Lectotype BU 691 (UK; Fortey et al. 1991) Restoration (Månsson et al., 2018) Literature specimen (UK; Fortey et al. 1991) Literature specimen (Månsson et al., 2018)

Leptoplastides salteri — photo 2 — Photo 2 · Lectotype BU 691 (UK; Fortey et al. 1991) Restoration (Månsson et al., 2018) Literature specimen (UK; Fortey et al. 1991) Literature specimen (Månsson et al., 2018)

Leptoplastides salteri — photo 3 — Photo 3 · Lectotype BU 691 (UK; Fortey et al. 1991) Restoration (Månsson et al., 2018) Literature specimen (UK; Fortey et al. 1991) Literature specimen (Månsson et al., 2018)

Leptoplastides salteri — photo 4 — Photo 4 · Lectotype BU 691 (UK; Fortey et al. 1991) Restoration (Månsson et al., 2018) Literature specimen (UK; Fortey et al. 1991) Literature specimen (Månsson et al., 2018)

Leptoplastides salteri — photo 5 — Photo 5 · Lectotype BU 691 (UK; Fortey et al. 1991) Restoration (Månsson et al., 2018) Literature specimen (UK; Fortey et al. 1991) Literature specimen (Månsson et al., 2018)

Leptoplastides salteri — photo 6 — Photo 6 · Lectotype BU 691 (UK; Fortey et al. 1991) Restoration (Månsson et al., 2018) Literature specimen (UK; Fortey et al. 1991) Literature specimen (Månsson et al., 2018)

Leptoplastides salteri — photo 7 — Photo 7 · Lectotype BU 691 (UK; Fortey et al. 1991) Restoration (Månsson et al., 2018) Literature specimen (UK; Fortey et al. 1991) Literature specimen (Månsson et al., 2018)

Classification

Order Ptychopariida / Suborder Olenina / Family Olenidae

Genus

Leptoplastides Raw, 1908

Genus author

Raw F.

Genus etymology

leptoplast-, Leptoplastus, a trilobite genus name; -ides, Greek, resembling, similar to

Species

L. salteri (Callaway, 1877)

Species author

Callaway C.

Species etymology

Salter, a surname

Age

Tremadocian (Early Ordovician)

Distribution

Synonyms

Conocoryphe Salteri; Olenus Salteri; Leptoplastus salteri; Beltella spinifera

Diagnosis

Cephalon transversely wide; cranidium trapezoidal, with two long spines at the anterior corners during early meraspid stages which later disappear; glabella stout with three pairs of glabellar furrows; fixigenae with a genal spine at the middle; narrow in the palpebral area; eyes small with distinct eye ridges; librigenae wide with medium-length genal spines. Thorax of 12 segments; axis subequal in width to pleurae, each axial ring with a long axial spine. Pygidium small, its axis also bearing an axial spine.

Remarks

This species is the type species of the genus Leptoplastides.