LARVAE & TRILOBITE ORDERS: HARPETIDA

From Chatterton, 1980

CLASSIFICATION & LARVAE:

The only harpetid protaspides described so far are those of Dolichoharpes (Chatterton, 1980). In addition, Chatterton & Speyer (1997) have figured two specimens of uncertain attribution (Dolichoharpes?) from the Crown Point Formation (Middle Ordovician).

Table 1. Classification scheme of the order Harpetida (from Ebach & McNamara, 2002). Protaspid larvae of only 1 (yellow & bold) of the 3 families have been described so far.

LOCALITIES:

1. Esbataottine Formation, Mackenzie Mountains, Canada. MIDDLE ORDOVICIAN. 2(?). Crown Point Formation, New York State, USA. MIDDLE ORDOVICIAN.

ARTICLES:

NOTE: This list only concerns articles where protaspid larvae of harpetid trilobites have been described or figured.

CHATTERTON, B.D.E. 1980. Ontogenetic studies of Middle Ordovician trilobites from the Esbataottine Formation, Mackenzie Mountains, Canada. Palaeontographica (A), 171: 1-74. CHATTERTON, B.D.E. & S.E. SPEYER.  1997. Ontogeny, p. 173-247 (see fig. 166-7&8, p. 212). In R. L. Kaessler (ed.), Treatise on Invertebrate Paleontology, Part O, Arthropoda 1, Trilobita (revised). Geological Society of America and University of Kansas Press, Lawrence, 530 p.

For more general information about the Order Harpetida, visit Sam Gon's Harpetida Summary page

AGNOSTIDA

LICHIDA

PTYCHOPARIIDA

ASAPHIDA

PHACOPIDA

REDLICHIIDA

CORYNEXOCHIDA

PROETIDA

(CORYNEXOCHIDA)

(LICHIDA)

Last modified: Dec. 12th 2006

Contact me