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Entosphenus folletti Vladykov & Kott, 1976

Northern California brook lamprey
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Image of Entosphenus folletti (Northern California brook lamprey)
Entosphenus folletti
Male picture by FAO

Classificatie / Names Populaire namen | Synoniemen | Catalog of Fishes (gen., sp.) | ITIS | CoL | WoRMS | Cloffa

Cephalaspidomorphi (lampreien of negenogen) (lampreys) > Petromyzontiformes (Lampreys) > Petromyzontidae (Northern lampreys) > Lampetrinae

Environment: milieu / climate zone / depth range / distribution range Ecologie

; zoetwater demersaal; standvastig.   Subtropical

Verspreiding Landen | FAO regio's | Ecosystems | Voorkomen | Point map | Introducties | Faunafri

North America: known only from the types collected from Willow Creek, upper Klamath river system, California.

Size / Gewicht / Leeftijd

Maturity: Lm ?  range ? - ? cm
Max length : 30.0 cm TL mannelijk/geslacht niet bekend; (Ref. 12280)

Korte beschrijving Morfologie | Morfometrie

Dorsale stekels (totaal): 0; Anale stekels 0. Adults: 17.6-22.8 cm TL; body proportions, as percentage of TL (based on 6 specimens measuring 18.6-22.8 cm TL): 12.3-14.5 prebranchial length, 9.2-10.6 branchial length, 42.7-48.6 trunk length, 28.4-32.7 tail length, 1.7-2.3 eye length and 6.6-7.8 disc length; 5.7 urogenital papilla length (percentage of branchial length in one spawning male measuring 21 cm TL); trunk myomeres, 61-65. Adult dentition: supraoral lamina, 3 unicuspid teeth, the median one smaller than the lateral ones; infraoral lamina, 5 unicuspid teeth; 4 endolaterals on each side; endolateral formula, typically 2-3-3-2, the fourth endolateral can also be unicuspid; 1-2 rows of anterials; first row of anterials, 2 unicuspid teeth; exolaterals absent; 1 row of posterials with 13-18 teeth, of which 0-4 are bicuspid and the rest unicuspid (some of these teeth may be embedded in the oral mucosa); transverse lingual lamina, 14-20 unicuspid teeth, the median one slightly enlarged; longitudinal lingual laminae teeth are too poorly developed to be counted. Velar tentacles in adults, 8-9, with tubercles; median tentacle is about the same size as the lateral ones immediately next to it; body coloration (preserved), dark brown on dorsal, lateral, and ventral aspects; lateral line neuromasts darkly pigmented; second dorsal fin pigmentation, +++; caudal fin pigmentation, +++; caudal fin shape, spade-like; oral papillae, 13.

Biologie     Verklarende woordenlijst (b.v. epibenthic)

Freshwater; in creeks and rivers (Ref. 89241). Non-parasitic lamprey; adults do not feed but remain in the streams where they soon spawn and die. Ammocoetes larvae live as filter feeders in the bottom mud for at least 4 years before metamorphosis.

Life cycle and mating behavior Geslachtsrijpheid | Voortplanting | Kuitschieten | Eieren | Fecundity | Larven

Voornaamste referentie Upload your references | Referenties | Coördinator | Medewerkers

McGinnis, S.M., 1984. Freshwater fishes of California. University of California Press, Berkeley. 316 p. (Ref. 12280)

Status op de Rode Lijst van het IUCN (Ref. 120744)


CITES (Ref. 118484)

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Gevaarlijk voor mensen

  Harmless





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Estimates based on models

Phylogenetic diversity index (Ref. 82805):  PD50 = 0.5156   [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00120 (0.00052 - 0.00278), b=3.00 (2.80 - 3.20), in cm Total Length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245).
Trophic Level (Ref. 69278):  4.2   ±0.7 se; Based on size and trophs of closest relatives
Weerstandsvermogen (Ref. 120179):  laag, minimale populatieverdubbelingstijd 4,5-14 jaar (assuming tm=5).
Kwetsbaarheid (Ref. 59153):  Moderate to high vulnerability (50 of 100) .