Lichida

Hoplolichoides conicotuberculatus

Order Lichida / Family Lichidae

Darriwilian (Middle Ordovician) to Sandbian (Late Ordovician)Estonia, Norway, Russia

Hoplolichoides conicotuberculatus — photo 1 — Photo 1 · Lectotype Tr2099 (Estonia; Thomas et al., 1988) Literature specimen (Estonia; Holloway et al., 2002) Complete enrolled dorsal exoskeleton with a malformed occipital spine (Russia; Baiya) Complete dorsal exoskeleton (Russia; Baiyu)

Hoplolichoides conicotuberculatus — photo 2 — Photo 2 · Lectotype Tr2099 (Estonia; Thomas et al., 1988) Literature specimen (Estonia; Holloway et al., 2002) Complete enrolled dorsal exoskeleton with a malformed occipital spine (Russia; Baiya) Complete dorsal exoskeleton (Russia; Baiyu)

Hoplolichoides conicotuberculatus — photo 3 — Photo 3 · Lectotype Tr2099 (Estonia; Thomas et al., 1988) Literature specimen (Estonia; Holloway et al., 2002) Complete enrolled dorsal exoskeleton with a malformed occipital spine (Russia; Baiya) Complete dorsal exoskeleton (Russia; Baiyu)

Hoplolichoides conicotuberculatus — photo 4 — Photo 4 · Lectotype Tr2099 (Estonia; Thomas et al., 1988) Literature specimen (Estonia; Holloway et al., 2002) Complete enrolled dorsal exoskeleton with a malformed occipital spine (Russia; Baiya) Complete dorsal exoskeleton (Russia; Baiyu)

Hoplolichoides conicotuberculatus — photo 5 — Photo 5 · Lectotype Tr2099 (Estonia; Thomas et al., 1988) Literature specimen (Estonia; Holloway et al., 2002) Complete enrolled dorsal exoskeleton with a malformed occipital spine (Russia; Baiya) Complete dorsal exoskeleton (Russia; Baiyu)

Hoplolichoides conicotuberculatus — photo 6 — Photo 6 · Lectotype Tr2099 (Estonia; Thomas et al., 1988) Literature specimen (Estonia; Holloway et al., 2002) Complete enrolled dorsal exoskeleton with a malformed occipital spine (Russia; Baiya) Complete dorsal exoskeleton (Russia; Baiyu)

Hoplolichoides conicotuberculatus — photo 7 — Photo 7 · Lectotype Tr2099 (Estonia; Thomas et al., 1988) Literature specimen (Estonia; Holloway et al., 2002) Complete enrolled dorsal exoskeleton with a malformed occipital spine (Russia; Baiya) Complete dorsal exoskeleton (Russia; Baiyu)

Hoplolichoides conicotuberculatus — photo 8 — Photo 8 · Lectotype Tr2099 (Estonia; Thomas et al., 1988) Literature specimen (Estonia; Holloway et al., 2002) Complete enrolled dorsal exoskeleton with a malformed occipital spine (Russia; Baiya) Complete dorsal exoskeleton (Russia; Baiyu)

Classification

Order Lichida / Family Lichidae

Genus

Hoplolichoides Phleger, 1936

Genus author

Phleger F. B.

Genus etymology

Hoplolich-, Hoplolichas, a trilobite genus name; -oides, Greek, resembling, similar to

Species

H. conicotuberculatus (Nieszkowski, 1859)

Species author

Nieszkowski J.

Species etymology

conic-, conicus, conical; tuberculatus, with small tubercles

Age

Darriwilian (Middle Ordovician) to Sandbian (Late Ordovician)

Distribution

Estonia, Norway, Russia

Synonyms

Lichas conico-tuberculata; Lichas (Hoplolichas) conico-tuberculata; Lichas (Hoplolichas) conicotuberculata; Hoplolichas conicotuberculatus

Diagnosis

Dorsal shield with nodes of varying size, the large ones conical. Cephalon wide-triangular; glabella with deep longitudinal furrows; occipital spine bifurcate into two stout spines extending backward-upward; librigenal genal spines stout; eyes small. Thorax of 11 segments; segments 7-10 may bear long axial spines; pleural furrows distinct; pleural spines short. Pygidium large; two pairs of pygidial pleural spines and three median marginal spines.

Remarks

This species is the type species of the genus Hoplolichoides.