Bulletin (Southern California Academy of Sciences)最新文献

{"title":"Asemichthys taylori Gilbert, 1912, Spinynose Sculpin, New to the California Marine Fauna","authors":"M. Love, G. Jensen, Kevin Lee","doi":"10.3160/3462.1","DOIUrl":"https://doi.org/10.3160/3462.1","url":null,"abstract":"On 21 June 2017, Author K. Lee, diving in 29 m of water at Esalen Pinnacle (36°07.6′′N, 121°39′′W), central California, photographed a fish we have identified as Asemichthys taylori Gilbert, 1912 [referred to by some authorities as Radulinus taylori (Gilbert 1912)], the spinynose sculpin (Fig. 1). We identified this fish through a combination of characters that we have compared with Radulinus asprellus Gilbert, 1890 (slim sculpin) and Radulinus boleoides Gilbert, 1898 (darter sculpin), the two species A. taylori most closely resembles (Table 1). The most diagnostic characters for this specimen are possession of 1) a dark lower half of the head, 2) a light band behind the eye, and 3) blue edging to some of the saddles (Table 1). Other characters that we can gauge from the photograph, including number of pectoral rays, number of scale rows behind the eye, and the relation of orbit width into snout length, all tend to confirm our identification (Table 1). Visual comparison of an image of R. asprellus (Figure 2) with both the central California and British Columbia fishes clearly demonstrates a range of differences including long nasal spines in R. asprellus (lacking in A. taylori), as well as a lack of the diagnostic characters listed above. Lastly, this specimen compares well with that of an A. taylori photographed within its previously known range in the San Juan Islands, Salish Sea (Fig. 3). Asemichthys taylori was originally collected in Departure Bay, Vancouver Island (about 49°12′N, 123°58′W) (Gilbert 1912). All subsequent captures have occurred in a relatively restricted area from southeastern Alaska, at the junction of Sumner and Clarence straits off Strait Creek (56°12′N, 133°15′W) (Love et al. 2005), to Keystone Jetty, Whidbey Island, Puget Sound (Kent et al. 2011). This new record represents a geographic range extension of about 1,400 km (870 mi). The maximum size of this species is 7.4 cm (Peden and Wilson 1976) and its documented depth range is 5–27 m (min.: Peden and Wilson 1976; max.: this paper). An undocumented capture has been reported at a depth of 49 m (W.A. Palsson, pers. comm. to M.L.). Relatively little is known of this species biology and behavior. In Washington State it typically occurs in the shallow subtidal on fragmented-shell bottoms adjacent to rock reefs (G.C. Jensen, pers. obs.) and is rarely taken in trawls. Spawning occurs at least during February and March in subtidal waters. At least in southern British Columbia spinynose sculpin exclusively lay their eggs in the nests of Enophrys bison Girard, 1854, the buffalo sculpin (Kent et al. 2011). Eggs are usually green in color, but may also be pink or orange. While it feed on a variety of crustaceans and bivalves, this species appears to be unique among cottids in ingesting large numbers of snails (Norton 1988). Upon capturing a snail, the sculpin punches holes in the gastropod’s shell using specialized vomerine teeth.","PeriodicalId":90803,"journal":{"name":"Bulletin (Southern California Academy of Sciences)","volume":"1 1","pages":"180 - 183"},"PeriodicalIF":0.0,"publicationDate":"2018-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90531632","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"California Records of the Oarfish, Regalecus russelii (Cuvier, 1816) (Actinopterygii: Regalecidae)","authors":"Richard F. Feeney, R. Lea","doi":"10.3160/3294.1","DOIUrl":"https://doi.org/10.3160/3294.1","url":null,"abstract":"Recent oarfish strandings in California have generated enormous interest. Oarfishes are iconic and have been feared as ‘sea monsters or serpents’ in the past and ‘harbingers of earthquakes’ more recently. The amount of media coverage and subsequent misconceptions has motivated us to document the California stranding records as best we can based on the most reliable information. Most accounts over the last century have regarded Regalecus as monotypic, as R. glesne (Heemstra 1986; Olney 2002; Horn et al. 2006; Nelson 2006; Page et al. 2013; Kells et al. 2016). Historically, and more recently, a second species, R. russelii or with a modified species spelling as russellii [as russelii (Cuvier 1816 (ex Shaw)) by Eschmeyer et al. 2017], has been recognized (Jordan 1902, 1907; Jordan and Starks 1907; Fujii 1984; Hayashi 2002; Roberts 2012, 2016; Angulo and López-Sánchez 2017). Both species have circumglobal, but not entirely overlapping, distributions. However, only R. russelii has been found, so far, in the northeastern Pacific, including Mexico, Costa Rica, and central and southern California. Morphologically, Regalecus russelii is characterized by 3-6 rays in the first dorsal crest and a single ray in the second dorsal crest, not connected with a membrane to the other. Regalecus glesne has 6-8 rays in the first crest and 5-11 rays in the second crest (Roberts 2012). The total number of dorsal rays, vertebrae and gill rakers are also diagnostic. Mitochondrial DNA sequences indicate distinct separation between these species (Roberts 2012). We have attempted to access all sources of information related to oarfish strandings off California, including newspaper articles, natural history museum records, published accounts, and the files and correspondence of Boyd Walker, John Fitch, Vladimir Walters, and other ichthyologists interested in early oarfish strandings. We have examined all California specimens at The Natural History Museum of Los Angeles County (LACM), Santa Barbara Museum of Natural History (SBMNH), Scripps Institution of Oceanography (SIO), and University of California Los Angeles (UCLA, now transferred to SIO). We have also searched VertNet (http://www.vertnet.org) and iDigBio (https://www.idigbio.org/) records. Length measurements are total lengths. In eight cases we feel the original measurements were by metric tape (numbers 3, 5, 7, 9, 10, 12, 13 and 18), one by John Fitch, two by LACM staff, one by scientists at the USC Wrigley Marine Science Center at Santa Catalina Island, one at the Catalina Island Marine Institute, one by researchers at California State University Fullerton, and two San Diego County specimens by researchers at Scripps Institute of Oceanography and the Southwest Fisheries Science Center, La Jolla.","PeriodicalId":90803,"journal":{"name":"Bulletin (Southern California Academy of Sciences)","volume":"22 1","pages":"169 - 179"},"PeriodicalIF":0.0,"publicationDate":"2018-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81892202","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Where the Weird Things are: A Collection of Species Range Extensions in the Southern California Bight","authors":"Jonathan P. Williams, Chelsea M. Williams, C. Blanchette, J. Claisse, D. Pondella, J. Caselle","doi":"10.3160/3850.1","DOIUrl":"https://doi.org/10.3160/3850.1","url":null,"abstract":"Abstract A large-scale monitoring program associated with the establishment of a marine protected area network in southern California provided an opportunity to observe and document unique or rare species across the region. Scientists and students from several educational and research institutions surveyed 145 subtidal reefs, 39 intertidal reefs, and five sandy beaches from 2011–2017, a period of time where oceanographic and climatic conditions changed serially and dramatically. In conjunction with an increase in monitoring frequency and locations, dramatic shifts in oceanographic climate during this same time period likely caused shifts in tolerable habitat conditions for many nearshore species. Here we describe range extensions, both to the north and south, of 14 marine fish, invertebrate, and algae species as observed during the 2011–2012 South Coast MPA Baseline Program and subsequent monitoring efforts.","PeriodicalId":90803,"journal":{"name":"Bulletin (Southern California Academy of Sciences)","volume":"217 ","pages":"189 - 202"},"PeriodicalIF":0.0,"publicationDate":"2018-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72494494","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Some Observations of Morphology and Behavior of a Hyperbenthic Misophrioid Copepod","authors":"S. Ohtsuka, H. Tanaka, K. Hirano, Y. Kondo, D. Jaume, G. Boxshall","doi":"10.3160/3615.1","DOIUrl":"https://doi.org/10.3160/3615.1","url":null,"abstract":"Abstract The locomotion, feeding, excretion, and oviposition of a member of the copepod family Misophriidae were observed based on a live specimen collected from a sandy bottom at a depth of 52 m off Nagannu Island, Okinawa, Japan. This species is related to Arcticomisophria Martínez Arbizu and Seifried, 1996 in the armature of leg 1, but the fifth leg is much more reduced. The combination of morphological characters strongly suggests that it represents an undescribed genus. The maxillipeds played a major role in attaching to the bottom and in crawling, while the antennae and mandibular palps were involved in slow swimming along the bottom. It fed on small-sized cultured phytoplankters, and excreted numerous fecal pellets. The female carried 4-5 eggs of 0.09 mm diameter that were loosely attached to the urosome. Nearly complete nuclear 18S and 28S rRNA gene sequences and a partial mitochondrial cytochrome c oxidase subunit 1 (CO1) gene sequence were obtained and are made available for future phylogenetic and systematic work.","PeriodicalId":90803,"journal":{"name":"Bulletin (Southern California Academy of Sciences)","volume":"158 1","pages":"127 - 137"},"PeriodicalIF":0.0,"publicationDate":"2018-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86349847","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The Evolution of the Thermal Niche Across Locally Adapted Populations of the Copepod Tigriopus californicus","authors":"C. Willett, C. Son","doi":"10.3160/3712.1","DOIUrl":"https://doi.org/10.3160/3712.1","url":null,"abstract":"Thermal performance is a key component of fitness particularly for ectotherms living in thermally variable environments. Local adaptation can occur within populations of a species that inhabit regions with divergent thermal conditions, but this adaptation may result in trade-offs in other measures of fitness. If these trade-offs affect other aspects of thermal performance, several different patterns are possible (Huey and Kingsolver 1993). One potential pattern from a trade-off is a shift in the thermal niche, meaning that an organism that can handle a new range of higher temperatures can no longer handle colder temperatures as well. A second type of pattern is a generalist/specialist trade-off whereby populations may have broader thermal niches but lower fitness at optimal temperatures [i.e. “a jack-of-all-trades is a master of none” (Huey and Hertz 1984)]. Another possibility is that increased investment associated with local thermal adaptation (i.e. high temperature tolerance) may result in trade-offs in non-thermally dependent traits (Angilletta et al. 2003). The nature and structure of these trade-offs could determine the degree to which organisms will be able to respond to a changing climate. The copepod Tigriopus californicus (Baker, 1912) has become an important system in which to study the evolution of local adaptation to the thermal environment. Geographically distinct populations of this copepod occur in upper intertidal pools along the Pacific coast from central Baja Mexico to Alaska. These populations often show high degrees of genetic divergence from one another indicating that levels of gene flow between populations can be very limited over long periods of time (Burton 1997; Edmands 2001; Willett and Ladner 2009). There is also a clear latitudinal gradient in high temperature survival that is suggestive of local thermal adaptation for this species (Willett 2010; Kelly et al. 2012; Leong et al. 2018). This latitudinal gradient for high temperature tolerance has been seen for nauplii and copepodids as well as adults (Tangwancharoen and Burton 2014). Local thermal adaptation in T. californicus is also suggested by studies of fitness components and competitive fitness under non-extreme temperatures. Hong and Shurin (2015) examined 15 populations of T. californicus from Vancouver Island, BC, Canada, to southern California (CA) for a set of life history traits that contribute to fitness under four different temperature conditions (from 15°C to 30°C). They estimated the net fitness effect of these traits by calculating an intrinsic population growth rate (r) and found a consistent shift in the thermal niche from south to north and also higher r in the northern populations. Willett (2010) also found that for comparisons across a set of moderate temperatures there was a flip in competitive fitness between pairs of southern and central CA T. californicus populations. Central CA populations outcompeted southern populations at 16°C while the o","PeriodicalId":90803,"journal":{"name":"Bulletin (Southern California Academy of Sciences)","volume":"29 1","pages":"150 - 156"},"PeriodicalIF":0.0,"publicationDate":"2018-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84408686","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Monstrilloid Copepods: the Best of Three Worlds","authors":"E. Suárez-Morales","doi":"10.3160/3646.1","DOIUrl":"https://doi.org/10.3160/3646.1","url":null,"abstract":"Abstract Monstrilloids are one of the most intriguing groups of copepods. Their complex life cycle represents the successful evolutionary outcome of dealing with three distinct kinds of habitat, viz., planktonic, benthic, and endoparasitic, each of which presents particular challenges that have been overcome by monstrilloids. These copepods combine a unique set of strategies and adaptations to complete their life cycle. The non-feeding planktonic adult phase lacks mouthparts and their antennules are fixed, thus limiting their swimming abilities but they compensate for this handicap by having powerful swimming legs and probably generate a very distinct hydrographic signal that may be useful in avoiding predators and allowing sexual recognition between adult males and females. Parasitizing exclusively on abundant, gregarious sessile or sedentary benthic organisms represents an advantage in that potential hosts can be found without the need for long-distance dispersal. The endoparasitic stages of monstrilloids are unique; after infection by an early planktonic nauplius, successive nauplioid stages feed on their own vitellum while developing feeding tubes to absorb nutrients from their hosts. They grow within the host's body as successive copepodite stages that are contained in a protective sheath. Preadult individuals exit through the host body wall causing significant host damage or death, behaving in these instances as parasitoids. The diversity of the group appears to be underestimated, and extensive geographic areas remain completely unknown for this group of copepods. More effort will be required to advance our knowledge of monstrilloid diversity and biology that are yet to be revealed.","PeriodicalId":90803,"journal":{"name":"Bulletin (Southern California Academy of Sciences)","volume":"46 1","pages":"103 - 92"},"PeriodicalIF":0.0,"publicationDate":"2018-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82487569","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Foreword: Proceedings from The 13th International Conference on Copepoda","authors":"J. Passarelli, D. Tang, J. Pallarés, Anthony Chan, Mildred Ronquillo, E. Mastro, Caroline Brady, Bruno Passarelli, S. Moore, M. Ohman","doi":"10.3160/soca-117-02-91.1","DOIUrl":"https://doi.org/10.3160/soca-117-02-91.1","url":null,"abstract":"The 13th International Conference on Copepoda was held from 16–21 July 2017, at Cabrillo Marine Aquarium (CMA) in Los Angeles, California, U.S.A. Approximately 150 participants from 29 countries convened at CMA to share their personal fascination and research interests on copepods. There was also a workshop on the Morphology and Systematics of Copepods from 10–14 July 2017, at the Scripps Institution of Oceanography in La Jolla, California, in conjunction with the conference. The scientific program consisted of 22 presentations in five symposia, 45 oral presentations in five contributed sessions, and 62 poster presentations. Three symposia were dedicated to Dr. Janet Bradford-Grieve, Dr. Janet W. Reid, and the late Prof. George W. Benz for their outstanding scientific contributions to marine planktonic, freshwater, and parasitic copepods, respectively. We would like to express our gratitude to Mike Schaadt (former Director of CMA), the local organizing committee (Dr. Julianne Kalman Passarelli, Dr. Danny Tang, Joey Pallares, Anthony Chan, Mildred Ronquillo, Ed Mastro, Caroline Brady, Bruno Passarelli, Shelly Moore, Prof. Ju-Shey Ho, Prof. Mark Ohman, and Dr. Regina Wetzer), the symposia organizers (Prof. Hans Dam, Prof. Mark Ohman, Prof. Rony Huys, Dr. Eduardo Suárez-Morales, and Dr. Leocadio Blanco-Bercial), and the staff and volunteers at CMA for their efforts and support. We also thank the conference sponsors, namely City of Los Angeles: Recreation and Parks, Port of Los Angeles, Friends of CMA, World Association of Copepodologists (WAC), Orange County Sanitation District, DoubleTree by Hilton San Pedro – Port of Los Angeles, Griffith Observatory, Battleship Iowa Museum, and California Science Center, for their generous patronage. This issue contains selected papers on topics ranging from behavior, symbiosis, genetics, and stress tolerance that were presented at the conference. Furthermore, the Maxilliped Lecture presented by Dr. Eduardo Suárez-Morales (Past-President of WAC) during the mid-conference tour is provided. As co-editors of this issue, we are grateful to the reviewers for their efforts which improved the quality of the manuscripts. We also extend our appreciation to the Southern California Academy of Sciences for sponsoring the publication of this issue.","PeriodicalId":90803,"journal":{"name":"Bulletin (Southern California Academy of Sciences)","volume":"73 1","pages":"91 - 91"},"PeriodicalIF":0.0,"publicationDate":"2018-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84186894","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Phylogenetic Study of Dioecious and Parthenogenetic Populations of Canthocamptus staphylinus (Crustacea, Copepoda, Harpacticoida)","authors":"E. Kochanova, J. Sarvala, E. Fefilova","doi":"10.3160/3732.1","DOIUrl":"https://doi.org/10.3160/3732.1","url":null,"abstract":"Abstract The phylogenetic relationships of four dioecious populations and one parthenogenetic population of the harpacticoid Canthocamptus staphylinus (Jurine, 1820) were studied. Analysis of the mtCOI gene revealed two main clades as a phylogenetic tree and a network of haplotypes: a clade with Fennoscandian populations in Lake Pääjärvi (Finland) and Lake Vänern (Sweden), and a second clade with populations in Lake Võrtsjärv (Estonia), Orlov Pond in Saint Petersburg (Russia), and the type locality of the species in Lake Geneva (Switzerland). The parthenogenetic population of C. staphylinus showed the smallest nucleotide and haplotype polymorphisms and could have evolved as a reaction to the changing environmental conditions following the Last Glacial Maximum, 20K YBP.","PeriodicalId":90803,"journal":{"name":"Bulletin (Southern California Academy of Sciences)","volume":"96 1","pages":"138 - 149"},"PeriodicalIF":0.0,"publicationDate":"2018-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81896600","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Planktonic Phases in Symbiotic Copepods: a Review","authors":"S. Ohtsuka, I. Madinabeitia, H. Yamashita, B. Maran, E. Suárez-Morales, J. Ho","doi":"10.3160/3616.1","DOIUrl":"https://doi.org/10.3160/3616.1","url":null,"abstract":"Abstract In symbiotic copepods, most naupliar stages are typically planktonic, playing a primary role in dispersal, while the first copepodid usually represents the infective stage. Later copepodid stages, including adults, are associated with host organisms. Many symbiotic copepods have abbreviated life cycles, with a reduced number of naupliar stages and two different feeding habits. These patterns are presumably related to distinct life cycles strategies. Exceptional cases are exemplified by members of the Monstrillidae and Thaumatopsyllidae, both of which are protelean parasites, with infective nauplii and non-feeding planktonic adults. In the Caligidae, the life cycle follows a generalized pattern, but adults of many species like Caligus undulatus seem to exhibit a dual mode of life involving host switching. Adults leaving the first host become temporarily planktonic before attaching to the final host. This dual mode of life is also found in adults of the Ergasilidae. Abbreviation of the planktonic phase is characteristic for some symbiotic taxa, thus suggesting that they have evolved to become highly efficient in locating and infecting new hosts without needing long-distance larval dispersal. The life cycle of copepods associated with zooplankters is also briefly reviewed. Zooplankters are clearly less used as hosts by copepods than benthic invertebrates. It is likely that symbiotic copepods dynamically utilize planktonic phases in their life cycle, thus maintaining the balance between dispersal, host location, reproduction, and predator-avoidance strategies.","PeriodicalId":90803,"journal":{"name":"Bulletin (Southern California Academy of Sciences)","volume":"32 1","pages":"104 - 119"},"PeriodicalIF":0.0,"publicationDate":"2018-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75774192","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"First Record of the Family Peltidiidae (Copepoda; Harpacticoida) from the Gulf of Mexico, with the Description of a New Species of Peltidium","authors":"C. Varela, S. Gómez","doi":"10.3160/3756.1","DOIUrl":"https://doi.org/10.3160/3756.1","url":null,"abstract":"Abstract Female harpacticoid copepod specimens representing an undescribed species of Peltidium (Peltidiidae) were found from an unidentified species of Sargassum during a series of samplings carried out in 2014 in Tampa Bay, Florida, U.S.A. The new species, Peltidium camilae, is similar to P. nichollsi Geddes, 1968 and P. lerneri Geddes, 1968. These species share the female exopod of leg 5 with two inner and three apical setae, the second endopodal segment of leg 1 with three setae, and the third endopodal segment of legs 2-4 with three, five and four setae, respectively. Peltidium camilae n. sp. can be distinguished from P. nichollsi and P. lerneri by having a shorter endopod relative to the exopod on legs 2-4, apical claws on the terminal exopodal segment of leg 1 that are as long as the first exopodal segment of leg 1, and subequal middle and inner apical setae on the exopod of leg 5. This is the first record of the family Peltidiidae from the Gulf of Mexico.","PeriodicalId":90803,"journal":{"name":"Bulletin (Southern California Academy of Sciences)","volume":"7 1","pages":"120 - 126"},"PeriodicalIF":0.0,"publicationDate":"2018-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87549659","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}