Invertebrate Paleontology Earth Sciences Division Natural History
Invertebrate Paleontology 19^ Earth Sciences Division Natural History Mu 3311m A NEW SPECIES OF CHIMNEY-BUILDING PENITELLA FROM THE GULF OF ALASKA (BIVALVIA: PHOLADIDAE) * LIBRARY 'Ol ANGBIES GOIJNTV \i: A>., , -APOsrr.'ON GEORGE L. KENNEDY AND JOHN M. ARMENTROUT 1 Made in United States of America Reprinted from THE VELIGER Vol. 32, No. 3, July 1989 © California Malacozoological Society, Inc., 1989 THE VELIGER © CMS, Inc., 1989 The Veliger 32(3):320-325 (July 3, 1989) A New Species of Chimney-Building Penitella from the Gulf of Alaska (Bivalvia: Pholadidae) by GEORGE L. KENNEDY Invertebrate Paleontology Section, Natural History Museum of Los Angeles County, 900 Exposition Boulevard, Los Angeles, California 90007, USA AND JOHN M. ARMENTROUT Mobil Oil Corporation, New Exploration Ventures, P.O. Box 650232, Dallas, Texas 75265, USA Abstract. Penitella hopkinsi sp. nov., from the Gulf of Alaska, differs from other species in the genus by its blunt and thickened posterior margin that inserts against the base of a chimney of agglutinated sediment (unique in the genus), by the shape of the mesoplax, and by details of the umbonal reflection and dorsal extension of the callum. Anatomy is unknown. Late Pleistocene records of the species range from the Seward Peninsula, Alaska, to Point Arena, California. INTRODUCTION acology]); MCZ, Museum of Comparative Zoology, Cam- bridge; NMC, National Museum of Natural Sciences, Recent efforts to identify several enigmatic species of Peni- Ottawa; NSMT, National Science Museum, Tokyo; tella Valenciennes, 1846, from both the northeastern and SBMNH, Santa Barbara Museum of Natural History, northwestern Pacific revealed that a number of nomencla- Santa Barbara; UCLA, University of California, Los An- tural and taxonomic problems in the genus still need to geles (collections at LACM); UCMP, University of Cal- be resolved (KENNEDY, 1985).
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