IngliżIt is jawless with a round sucker-like mouth and has an outer circle of small teeth and an inner circle of large teeth (Ref. 88171). It has a typical eel-like shape with 2 dorsal fins and 7 gill openings behind the eye. It lacks paired fins. Young adults are uniformly greyish in colour. As it ages, the river lamprey becomes greenish-brown dorsally, golden yellow along the sides and white ventrally (Ref. 58137). In coastal waters of Germany, it can be confused with the sea lamprey (Petromyzon marinus), which is distinguished by having its teeth arranged in many consecutive circular rows (Ref. 88171). Other diagnostic features: Adults 8.6-49.2 cm TL. Body wet weight in individuals 18.0-49.2 cm TL, 30-150 g. Body proportions, as percentage of TL (based on 48 specimens measuring 10.8-38.6 cm TL): prebranchial length, 10.0-12.9; branchial length, 7.9-11.3; trunk length, 46.2-54.3; tail length, 24.1-30.3; eye length, 1.4-3.1; disc length, 4.6-7.0. Urogenital papilla length, as a percentage of branchial length, in 19 spawning males measuring 19.7-28.3 cm TL, 15.9-37.5. Trunk myomeres, 58-66. Dentition: marginals, 70-95; supraoral lamina, 2 unicuspid teeth; infraoral lamina, 5-9 either all unicuspid teeth or, more frequently, the lateralmost are bicuspid and the internal ones unicuspid; 3 endolaterals on each side; endolateral formula, typically 2-3-2, rarely 1-3-2 or 2-3-1; 1-2 rows of anterials; first row of anterials, 4-7 unicuspid teeth; exolaterals absent; posterials absent; transverse lingual lamina, 8-18, usually 12-14, unicuspid laminae straight or parentheses-shaped and each with 9-13 unicuspid teeth. Marginal membrane present. Velar tentacles, 4-10, with tubercles; no velar wings. Body coloration in recently metamorphosed individuals silvery; in preserved upstream migrants, bluish brown or lead gray on the dorsal aspect tending towards silvery on the lateral aspects and whitish or yellowish on ventral aspect. Early upstream spawning migrants returning from
Dehra traduzzjoni
Tradott mill-Ingliż minn BING
Din it-traduzzjoni hija purament indikattiva: minħabba l-kwalità limitata tat-test sors, id-deskrizzjonijiet morfoloġiċi huma disponibbli biss bl-Ingliż fil-verżjoni BETA tas-sistema. L-informazzjoni multilingwi se tkun disponibbli fil-ħarġiet futuri.
MaltiDan huwa jawless bil-ħalq tond bħal sucker u għandu xi ċirku fuq barra ta ' snien żgħar u xi irku ta ' snien kbar (Ref. 88171). Għandha forma tipiku sallur simili b ' 2 gangliji xewk u fetħiet garġi 7 wara l-għajn. Ikollu nieqsa l-Kredits tax-xewk. Żgħażagħ adulti huma fil-griż b'mod uniformi fil-kulur. Kif huwa l-etajiet, l-lamprey tax-xmara isir kannella fl-aħdar dorsali, golden isfar matul il-ġnub u abjad ventrally (Ref. 58137). Fl-ilmijiet tal-kosta tal-Ġermanja, ma jista jiġi konfuż mat-lamprey bil-baħar (Petromyzon marinus), li huwa distint minn wara li tagħha snien rranġati f'ringieli ħafna konsekuttivi ċirkulari (Ref. 88171). Karatteristiċi oħra dijanjostiċi: TL 8.6-49.2 ċm adulti. Korp imxarrab piż fl-individwi 18.0-49.2 ċm TL, 30-150 g. korp proporzjonijiet, bħala perċentwali ta ' TL (ibbażat fuq kampjuni 48 tal-kejl ta ' 10.8-38.6 ċm TL): it-tul prebranchial, 10.0-12.9; it-tul branchial, 7.9-11.3; it-tul tal-ġisem, 46.2-54.3; it-tul tad-denb, 24.1-30.3; it-tul ta ' l-għajnejn, 1.4-3.1; it-tul tad-diska, 4.6-7.0. Tul urogenital papilla, bħala perċentwali tal-tul branchial, 19 ibejjed maskili TL 19.7-28.3 ċm, 15.9-37.5 tal-kejl. Myomeres zokk, 58-66. Snien: marġinali, 70-95; supraoral lamina, snien 2 unicuspid; infraoral lamina, 5-9 jew snien unicuspid kollha jew, iktar spiss, l-lateralmost huma bicuspid u l-intern dawk unicuspid; endolaterals 3 fuq kull naħa; il-formola endolateral, tipikament 2-3-2, rari 1-3-2 jew 2-3-1; 1-2 ringieli ta ' anterials; ewwel filliera ta ' l-anterials, 4-7 unicuspid snien; exolaterals assenti; posterials assenti; lamina muskolu trasversali, 8-18, normalment 12-14, laminae unicuspid dritta jew għamla ta-parentesi u kull waħda bi snien unicuspid 9-13. Membrana marġinali preżenti. Tentacles velari, 4-10, mal-tubercles; ebda velari ġwienaħ. Korp kolorazzjoni fl-individwi riċentement metamorphosed silvery; fl-preservati migranti upstream, kannella blu jew ċomb griż fuq l-aspett tad-dahar li jidhru lejn il-silvery fuq l-aspe
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