| 词条 | Ramellogammarus similimanus |
| 释义 |
| regnum = Animalia | phylum = Arthropoda | subphylum = Crustacea | classis = Malacostraca | ordo = Amphipoda | subordo = Senticaudata | superfamilia = Gammaroidea | familia = Anisogammaridae | genus = Ramellogammarus | species = R. similimanus |binomial = Ramellogammarus similimanus |binomial_authority = Bousfield, 1961 }}Ramellogammarus similimanus is a crustacean species in the family Anisogammaridae. Because this amphipod only resides in the Portland metropolitan area, in Oregon, United States, it has been given the common name "Stumptown scud."[1] DescriptionR. similimanus is about the size of a pinky nail.[1] It has a curled outer shell of a golden color[1] and long antennae.[1] Its appearance has been described as a "cross between a prawn and a potato bug."[1] Similar to marsupials, females have a pouch in which they carry their eggs.[1]Habitat and rangeThe species is believed to only exist within the boundaries of the Portland metropolitan area.[2] It lives in small freshwater creeks and tributaries.[2] "Stumptown" is a nickname applied to Portland and several other locations in the United States.[3][4][5] Behavior and ecologyR. similimanus is difficult to observe as it prefers to remain hidden under the organic material on which it feeds.[2][6] It can only move via connected waterways, limiting its geographic scope.[2] Scavenged dead and decaying material makes up its diet.[2] It is consumed by amphibians and fish.[2]Mating involves a complex ritual.[1] Males search for maturing females who are nearly ready to molt out of their shells.[1] The males then ride the backs of the females to secure them and prevent other males from stealing their chosen mate.[1] ResearchThe species was first described by Edward L. Bousfield in 1961.[7] The Oregon Zoo funded research conducted by Oregon State University through the "Oregon Zoo Foundation's Future for Wildlife program".[8] The researchers have used the environmental DNA methodology in order to minimize impact on a small and vulnerable population.[2] References1. ^1 2 3 4 {{cite news |last=Tomlinson |first=Stuart |date=May 1, 2017 |title=Stumptown scud: Researchers say small crustacean resides exclusively in Portland waterways |url=http://katu.com/news/local/stumptown-scud-researchers-say-small-crustacean-is-found-only-in-portland-waterways |publisher=KATU |location=Portland, Oregon |access-date=May 3, 2017}} 2. ^1 2 3 4 5 6 7 8 9 10 {{cite news |last=Williams |first=Kale |date=May 3, 2017 |title=This tiny crustacean only lives in Portland |url=http://www.oregonlive.com/portland/index.ssf/2017/05/this_tiny_crustacean_only_live.html |format=Video |work=Oregon Live |location=Portland, Oregon |access-date=May 3, 2017}} 3. ^{{cite web | publisher = End of the Oregon Trail Interpretive Center | title = From Robin's Nest to Stumptown | url = http://www.historicoregoncity.org/HOC/index.php?option=com_content&view=article&catid=70%3Aoregon-trail-history&id=155%3Aearly-towns-and-cities&Itemid=98 | accessdate = January 23, 2012 | deadurl = yes | archiveurl = https://web.archive.org/web/20121122054301/http://www.historicoregoncity.org/HOC/index.php?option=com_content&view=article&catid=70%3Aoregon-trail-history&id=155%3Aearly-towns-and-cities&Itemid=98 | archivedate = November 22, 2012 | df = }} 4. ^{{cite book|last=MacColl|first=E. Kimbark|title=The Growth of a City: Power and Politics in Portland, Oregon 1915–1950|year=1979|publisher=The Georgian Press|location=Portland, Oregon|isbn=0-9603408-1-5}} 5. ^MacColl cites the "4 March 1877, entry in 'Autobiographical Account', John C. Ainsworth Papers, OHS; Oregonian; 4 December 1900" 6. ^{{cite news |last=Vogt |first=Tom |date=April 23, 2017 |title=Off Beat: Stumptown scud doesn’t live here, but its cousin does |url=http://www.columbian.com/news/2017/apr/23/off-beat-stumptown-scud-doesnt-live-here-but-its-cousin-does/ |work=The Columbian |location=Vancouver, Washington |access-date=May 3, 2017}} 7. ^*{{cite book |url=https://books.google.com/books?id=2U8CBAAAQBAJ&pg=PA589 |title=Thorp and Covich's Freshwater Invertebrates: Keys to Nearctic Fauna |first1=James H., Ed. |last1=Thorp |first2=D. Christopher, Ed. |last2=Rogers |page=589 |isbn=9780123850294 |publisher=Elsevier Science |date=December 28, 2015}} 8. ^{{cite web |url=http://www.oregonzoo.org/news/2017/04/scientists-scour-portland-stumptown-scud |title=Scientists scour Portland for 'Stumptown scud' |last= |first= |date=April 19, 2017 |website=Oregon Zoo |publisher=Oregon Zoo |access-date=May 3, 2017|quote=}} External links
Further reading
|first5=Richard |last5=Bottorff |work=Zootaxa |date=November 2012|accessdate=May 6, 2017}}
4 : Crustaceans of the United States|Freshwater crustaceans|Gammaridea|Amphipoda |
| 随便看 |
|
开放百科全书收录14589846条英语、德语、日语等多语种百科知识，基本涵盖了大多数领域的百科知识，是一部内容自由、开放的电子版国际百科全书。