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Bulletin of the Southern California Academy of Sciences
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  This is an Open Access Journal Open Access journal
     ISSN (Print) 0038-3872
     Published by Southern California Academy of Sciences Homepage  [1 journal]
  • Range Extensions and New Host Records of Cymothoid Isopods (Isopoda:
           Cymothoidae) in the Eastern Pacific Ocean

    • Authors: Richard C. Brusca
      PubDate: Thu, 09 Oct 2014 15:26:48 PDT
       
  • A New Species of Rhinehothrium (Cestoda: Tetraphyllidea) and Redescription
           of Three Rhinebothriate Species from the Round Stingray, Urolophus halleri
           Cooper in Southern California

    • Authors: Ralph Appy et al.
      Abstract: A new species of Rhinebothrium (Tetraphyllidea: Phyllobothriidae) is described from the spiral valve of three round stingrays, Urolophus halleri Cooper, collected in Anaheim Bay, Seal Beach, California. Redescriptions of R. urobatidium (Young, 1955) n. comb., R. bilobatum (Young, 1955) n. comb, and Caulobothrium multorchidum (Young, 1954) n. comb, are made from material available in the USNM Helminthological Collection and new material from the type host. The validity of generic characteristics is discussed and generic evaluations of Rhinebothrium Linton, 1890, Caulobothrium Baer, 1948, and Rhabdotobothrium Euzet, 1953, are emended.
      PubDate: Thu, 09 Oct 2014 15:26:47 PDT
       
  • The Effect of Endogenous 5-HT on K Ion Enhancement of Ciliary Activity in
           the Mussel Mytilus edulis

    • Authors: Anthony A. Paparo et al.
      Abstract: The cilioexcitatory effect of 5-HT (serotonin) on lateral cilia has been observed in Mytilus. In the presence of exogenous 5-HT. K ions enhanced the cilioexcitatory effect of 5-HT after a 3 s lag period. Addition of BOL (bromolysergic acid: 5-HT inhibitor decreased the cilioexcitatory effect of 5-HT. An increase in the lag period was also observed. Addition of PCPA (p-chlorophenylalanine; tryptophan hydroxylase inhibitor) decreased endogenous stores of 5-HT and the cilioexcitatory effect of K ions. An increase in the lag period was also observed. The present investigation shows that K ions have a cilioexcitatory effect on lateral cilia after producing a momentary lag period. Furthermore, the presence of 5-HT is required to bring about the cilioexcitatory effect of K ions.
      PubDate: Thu, 09 Oct 2014 15:21:50 PDT
       
  • Five New Morphotypes of Phyllobothrium delphini (Cestoda: Tetraphyllidea).
           Their Relationship to Existing Morphotypes, and Their Zoogeography

    • Authors: Jacqueline Testa et al.
      Abstract: Phyllobothrium delphini (Bosc, 1802) was recovered from 25 marine mammals representing 12 species in two orders from four geographical localities. Five new cyst morphotypes are described. Comparison of mean measurements of each morphotype with the others suggests that P. delphini may represent more than one species. New host records for P. delphini are reported for Tursiops gilli Dall, Pontoporia blainvillei Gervais, and Lagenodelphis hosei Fraser. An apical sucker is noted for the first time on Monorygma grimaldii.
      PubDate: Thu, 09 Oct 2014 15:21:49 PDT
       
  • Reconnaissance Geology of Cedros Island, Baja California, Mexico

    • Authors: Frank H. Kilmer
      Abstract: Cedros Island is composed of late Jurassic melange of Franciscan aspect (herein designated Cedros Formation) which nearly everywhere is in tectonic contact with ophiolite and a superjacent sedimentary sequence of middle Jurassic to late Cenozoic age. Analogy with structural relationships in California suggests that the Cedros Formation was subducted beneath the ophiolite as oceanic and continental plates converged. Subduction was initiated during latest Jurassic time and concluded during the early Cretaceous. The San Carlos fault, presumably the subduction surface, may be a southern extension of the Coast Range thrust. During late Cenozoic time, three bodies of Cedros Formation were uplifted along faults which truncated ophiolite, superjacent rocks through Pliocene age, the San Carlos fault, and the San Agustin shear zone.
      PubDate: Thu, 09 Oct 2014 15:21:48 PDT
       
  • Brooding Behavior and Protandry in Hipponoe gaudichaudi (Polychaeta:
           Amphinomidae)

    • Authors: Jerry D. Kudenov
      Abstract: Analysis of two extensive museum samples of Hipponoe gaudichaudi Audouin & Milne-Edwards indicates that this amphinomid polychaete broods its juveniles in intersegmental grooves. Juveniles undoubtedly migrate from the ventrum to the dorsum of juveniferous worms as they increase in size. Analysis of oocyte diameters and spermatocyte densities in relation to the number of body segments indicates that this species is a protandric hermaphrodite. The spermatozoa are primitive (Franzen, 1956).
      PubDate: Thu, 09 Oct 2014 15:21:47 PDT
       
  • Diagnostic Characters and Color Convergence of the Garter Snakes
           Thamnophis elegans terrestris and Thamnophis couchii atratus along the
           Central California Coast

    • Authors: Jeanne M. Bellemin et al.
      Abstract: Along the central California coast, the closely related garter snakes Thamnophis elegans terrestris and T. couchii atratus have very similar color patterns. Both are characterized by a dark dorsum with three yellow stripes, no red markings, and yellowish throats. Plasma samples from 38 live specimens were subjected to electrophoresis and autoradiography to establish identity on the basis of transferrin mobility. Fourteen morphological characters were studied in the same specimens and correlated with the transferrin types by a stepwise discriminant analysis program. Discriminant functions derived from these specimens were tested on an additional 101 live and preserved specimens. The results indicate that the most important diagnostic characters are the amount of internasal-rostral contact, internasal width versus length, number of dorsal scale rows, and vertebral stripe width. Counts of posterior scale rows and ventral scales, and estimation of relative pupil size, may aid in identification. Further observations have shown that coastal populations of T. elegans terrestris and T. couchii atratus can be distinguished reliably by ventral coloration. However, geographic variation in color patterns is evident, and we suggest that dorsal color patterns of these snakes are strongly convergent in San Luis Obispo and Monterey counties primarily in response to predator selection pressure.
      PubDate: Thu, 09 Oct 2014 15:21:45 PDT
       
  • Cover

    • PubDate: Thu, 09 Oct 2014 15:16:48 PDT
       
  • A New Species of Eutrombicula (Acarina: Trombiculidae) from Lizards of
           Nevado de Colima, Jalisco, Mexico

    • Authors: Richard B. Loomis et al.
      PubDate: Thu, 09 Oct 2014 15:16:41 PDT
       
  • Larvae of Onthophagus p. polyphemi Hubbard an Onthophagus tuberculifrons
           Harold (Coleoptera: Scarabaeidae)

    • Authors: Daniel A. Guthrie et al.
      PubDate: Thu, 09 Oct 2014 15:11:49 PDT
       
  • Response of Cerithidea californica (Haldeman) to Lowered Salinities and
           its Paleoecological Implications

    • Authors: David B. Scott et al.
      PubDate: Thu, 09 Oct 2014 15:11:47 PDT
       
  • A New Genus and Species of Polychaete (Family Capitellidae) from Southern
           California

    • Authors: Fred M. Piltz
      PubDate: Thu, 09 Oct 2014 15:11:46 PDT
       
  • Taxonomic Notes on Tantilla (Serpentes: Colubridae) from Tropical America

    • Authors: Larry David Wilson et al.
      Abstract: Distributional and taxonomic notes are given for eight species of the colubrid snake genus Tantilla from Mexico, Guatemala, Costa Rica, Colombia, and Ecuador.
      PubDate: Thu, 09 Oct 2014 15:11:45 PDT
       
  • A New Species of Autolytus (Polychaeta: Syllidae) Commensal on a
           California Hydrocoral

    • Authors: John D. Wright et al.
      Abstract: A new species of polychaete of the genus Autolytus is described from the hydrocoral Allopora californica. The atolcous stage lives on the surface of the hydrocoral within a blister of host origin. This type of host association was not previously known in the genus Autolytus .
      PubDate: Thu, 09 Oct 2014 15:06:51 PDT
       
  • Interbreeding Members of the Sphyrapicus varius Group (Aves: Picidae) in
           Oregon

    • Authors: M. Ralph Browning
      Abstract: Evidence from specimens collected in south-central Oregon provides further support for considering Sphyrapicus nuchalis and S. ruber as distinct species of the S. varius group.
      PubDate: Thu, 09 Oct 2014 15:06:49 PDT
       
  • DOPA Decarboxylase Activities and Potassium Stimulation of Lateral Cilia
           on the Gill of Mytilus edulis I. A Response to DOPA Decarboxylase
           Inhibitors and Chemical Sympathectomy

    • Authors: Anthony A. Paparo et al.
      Abstract: DOPA decarboxylase and potassium stimulation of ciliary activity was measured in the gill of Mytilus edulis. DOPA decarboxylase inhibitors (STH, and a-methyl-DOPA) decreased the decarboxylase activity in extracts of gill with subsequent enhancement of potassium stimulation of ciliary activity. Intramuscular injection of STH and a-methyl-DOPA caused a gradual decrease in the DOPA decarboxylase and green-fluorphore activities with an increase in lateral ciliary activity in response to potassium stimulation. Recovery was observed ten days after a single dose of a-methyl-DOPA. Intramuscular injection of 6-OH-DOPA caused a rapid decrease in the DOPA decarboyxlase and green-fluorophore activities with a rapid increase in lateral ciliary activity in response to potassium stimulation. However, there was a decrease in all three parameters to near zero activity within 10 days. This study shows that potassium enhancement of lateral ciliary activity is correlated with and may depend on the amount of DOPA decarboxylase in the gill. A decrease in this enzyme results in a potentiation of the potassium effect on lateral ciliary activity.
      PubDate: Thu, 09 Oct 2014 15:06:48 PDT
       
  • Surface Air Flow in Coastal Southern Califonia

    • Authors: Gerald Hannes
      Abstract: Resultant winds are presented at hourly values for each month in 1972 at three sampling sites located in coastal southern California. The end point of the onshore flow vector during certain afternoon hours describes either a clockwise or counterclockwise rotation. The counterclockwise movements are not likely related to topographic restraints but are probably caused by other factors. The land breeze has two distinct offshore flow regimes at each individual site, especially during the month of December. These two flow regimes generally display opposite vector rotational characteristics through time. During the summer months, the land breeze is not present in the mean, but is replaced by a flow that generally parallels the coast.
      PubDate: Thu, 09 Oct 2014 15:06:46 PDT
       
  • A Small Herpetofauna from the Late Pleistocene of Newport Beach Mesa,
           Orange County, California

    • Authors: Dennis M. Hudson et al.
      Abstract: A Late Pleistocene herpetofauna consisting of Hyla regilla, Bufo boreas, Rana aurora, Aneides lugubris, Thamnophis, Lampropeltis getulus, Masticophis flagellum, and Crotalus viridis has been identified from Newport Beach Mesa, Orange County, California. Aneides lugubris is reported as a fossil for the first time. Corrections and further identifications have been made on fossil herpetofaunas from two other Orange County localities. These faunas suggest post-LaBrean changes in the coastal Orange County vegetation from chaparral and live-oak woodland with riparian woodlands to that of coastal sage scrub with sycamore woodlands. Subsequently the sycamore riparian community receded into the nearby Santa Ana Mountains leaving coastal sage scrub and intermittent grasslands in coastal Orange County. These communities have subsequently been reduced by increased agriculture and urbanization.
      PubDate: Thu, 09 Oct 2014 15:06:45 PDT
       
  • Morphology of Sorella in Natural Habitats and under Laboratory Conditions

    • Authors: Joan G. Steward
      Abstract: Although thalli attributable to the genus Sorella (Delesseriaceae, Rhodophyceae) can be easily recognized, determination of species is difficult. The characters described for differentiating the type species are found to vary and overlap when numerous specimens are examined. Attempts to correlate morphological aspects with environmental variables (e.g., depth, substrate, light, temperature, or season) were unsuccessful. When plants typical of each of the California species were grown in the laboratory under a series of different light and temperature regimes each maintained its distinctiveness. Development of reproductive structures, vegetative growth rates, and a Polysiphonia-typs life history are described from cultured plants. It is suggested that non-pinnate variants, whether broad or narrow, be referred to S. delicatula: all specimens of this species were of the size described for var. californica. Pinnately branched, often but not always relatively broad, thalli with either paired or median spermatangial sori are treated as S. pinnata.
      PubDate: Thu, 09 Oct 2014 15:01:53 PDT
       
  • A New Species of Rhynchospio (Polychaeta: Spionidae) from San Clemente
           Island, California

    • Authors: John H. Dorsey
      Abstract: A new species of Rhynchospio is described from shallow subtidal rocky areas at San Clemente Island. Comparisons are made with related Rhynchospio species.
      PubDate: Thu, 09 Oct 2014 15:01:51 PDT
       
  • Cover

    • PubDate: Thu, 09 Oct 2014 15:01:50 PDT
       
 
 
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