Signal Hill (or Los Cerritos) (Pleistocene to of the United States)

Also known as NE of Long Beach, CA

Where: California (33.8° N, 118.2° W: paleocoordinates 33.8° N, 117.8° W)

When: Upper Member (San Pedro Formation), Pleistocene to Pleistocene (2.6 - 0.0 Ma)

Environment/lithology: marine; lithology not reported

Size classes: macrofossils, mesofossils

• A piece of merus of an ambulatory leg (P. tuberculata); one propodus of left cheliped at Stanford U. (M. idae); one moveable finger (H. nudus); one major movable finger (L. diegensis); two movable fingers, major and minor (L. leucomanus); 4 movable and 1 immovable finger (C. productus); 1 movable finger [this finger belonged to a larger specimen than has been recorded for Recent occurrences] (R. branneri); left immovable finger (distal two-thirds) of a large specimen (C. bellicosus); 14 arms and 2 movable fingers (R. ornata); 1 large dactylus of right cheliped (H. lineatus); one right movable and one right immovable finger (C. stephensi);

Collected by I. S. Oldroyd; reposited in the USNM

• Cat. No. 353595; C. productus (Cat. No. 353390); R. branneri (Cat. No. 353594); H. lineatus (Cat. No. 353362);

Primary reference: M. J. Rathbun. 1926. The Fossil Stalk-Eyed Crustacea of the Pacific Slope of North America. United States National Museum Bulletin 138:1-155 [C. Schweitzer/S. Yost/M. Uhen]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 138720: authorized by Carrie Schweitzer, entered by Samantha Yost on 26.01.2013, edited by Mark Uhen

Creative Commons license: CC BY (attribution)

Taxonomic list

• H. lineatus finger is distinguished at once from others found at the same locality by the longitudinal, finely milled, stridulating ridge on the inner surface, a little below the upper edge and running the whole length of the finger except on the horny tip.
Malacostraca
 Decapoda - Panopeidae
Lophopanopeus diegensis Rathbun 1900 crab
Lophopanopeus leucomanus Lockington 1876 crab
 Decapoda - Varunidae
Hemigrapsus nudus Dana 1851 crab
 Decapoda - Portunidae
Callinectes bellicosus Stimpson 1862 swimming crab
 Decapoda - Aethridae
Hepatus lineatus Rathbun 1898 crab
 Decapoda - Epialtidae
Pugettia richii Dana 1851 crab
 Decapoda - Inachoididae
Pyromaia tuberculata Lockington 1877 crab
 Decapoda - Cancridae
Cancer productus Randall 1839 lobster
Romaleon branneri Rathbun 1926 crab
 Decapoda - Leucosiidae
Randallia ornata Randall 1839 crab
 Decapoda - Parthenopidae
Mesorhoea idae Rathbun 1926 crab
 Decapoda - Callianassidae
Callianassa stephensi Rathbun 1926 decapod
Echinoidea
 Clypeasteroida - Mellitidae
Mellita longifissa Michelin 1858 sand dollar
 Clypeasteroida - Dendrasteridae
Dendraster vizcainoensis Grant and Hertlein 1938 sand dollar
n. subspecies similaris