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Polychaeta source details
Westheide & Hass-Cordes. (2001). Molecular taxonomy: description of a cryptic Petitia species (Polychaeta: Syllidae) from the island of Mahé (Seychelles, Indian Ocean) using RAPD markers and ITS2 sequences. Journal of Zoological Systematics and Evolutionary Research. 39(1-2): 103-111.
52125
10.1046/j.1439-0469.2001.00166.x [view]
Westheide & Hass-Cordes
2001
Molecular taxonomy: description of a cryptic Petitia species (Polychaeta: Syllidae) from the island of Mahé (Seychelles, Indian Ocean) using RAPD markers and ITS2 sequences
Journal of Zoological Systematics and Evolutionary Research
39(1-2): 103-111
Publication
Kristian Fauchald's Polychaeta DB
Kristian Fauchald's Polychaeta DB
Petitia occulta sp. n. provides an example demonstrating that a morphologically indistinguishable species taxon can be described by molecular markers alone. Phenotypically the polychaete belongs to Petitia amphophthalma Siewing, 1956, one of the numerous meiofaunal species that have previously been regarded as cosmopolitan. Genotypically, however, by means of randomly amplifed polymorphic DNA (RAPD)-polymerase chain reaction (PCR) (a DNA-fingerprinting technique) the population on the Indo-Pacific island of Mahé can be identified as a distinct taxonomic entity as: (1) genetic distance values between the Petitia from the Seychelles and from other sites (Mediterranean, Canary Islands) are relatively great; (2) differently generated cluster analyses of genetic distances produce phenograms revealing a distinctly separate clade (bootstrap 100%) for the Seychelles animals; and (3) the Seychelles animals are characterized by eight monomorphic diagnostic (i.e. autapomorphic) DNA-fragments. The RAPD procedure in this case requires the preparation of the whole organisms and, thus, no holotype is available. Instead the RAPD band-pattern with the diagnostic markers of one individual obtained with six primers, isolated DNA of one individual, and syntypes in the form of fixed, complete individuals are deposited. Species di?fferentiation is confirmed by genomic DNA sequencing (ITS2).
Indian Ocean
Systematics, Taxonomy
Date action by 2013-01-12 18:30:12Z created db_admin
Petitia occulta Westheide & Hass-Cordes, 2001 accepted as Neopetitia occulta (Westheide & Hass-Cordes, 2001) (original description)
Syntype SMF 10010, geounit Seychelles, identified as Petitia occulta Westheide & Hass-Cordes, 2001
Paratype SMF 10011, identified as Petitia occulta Westheide & Hass-Cordes, 2001 Depth range Intertidal beach, in the 5-10 cm of the surface layer of sand. [details] Distribution Southwest Indian Ocean, Seychelles, Island of Mahé, Anse Forbans beach. Known only from the type locality. [details] Etymology The specific epithet occulta comes from the Latin word occultus, -a, -um, meaning hidden, concealed, and refers to ... [details] Habitat Lower half of intertidal beach, in relatively coarse, extremely clean sand. [details] Type locality Southwest Indian Ocean, Seychelles, Island of Mahé, east coast, Anse Forbans beach (4º47'S, 55º31'E), lower half ... [details] Type material According to Westheide & Hass-Cordes (2001), the type material SMF 10010 includes three syntypes, while Fiege & ... [details] |