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Overview |
Main identification features
- dorsal fin continuous
- body: 3 dark stripes
- lower jaw pointed, strongly projecting
- lateral line has 1-2 scales pieces
Body long and slender; head slender, with long pointed lower jaw; both lips with papillae, usually 9-10 on top lip; dorsal fin in 1 part, origin behind nape, above anal fin origin; dorsal IX-XI (usually X), 27-31; anal II, 36-39; pectoral 13-16 (usually 15); lateral line scales 50-53; lateral line broken or complete.
Color variable; head blotched or spotted; usually a dark stripe (composed of a spot at the base of each dorsal fin ray) along midback, 2 thin dark stripes along upper side, with lower one ending in a large blotch on the base of the tail fin; a dark line above the anal fin base; tail fin with 1-2 bars.
Size: 9.6 cm.
Habitat: coastal sandy areas.
Depth: 1-20 m.
Central Mexico to Costa Rica.
Attributes
Abundance: Common.
Cites: Not listed.
Climate Zone: Northern Tropical (Mexican Province to Nicaragua + Revillagigedos).
Depth Range Max: 20 m.
Depth Range Min: 1 m.
Diet: bony fishes; mobile benthic gastropods/bivalves; mobile benthic crustacea (shrimps/crabs); mobile benthic worms.
Eastern Pacific Range: Northern limit=24; Southern limit=9; Western limit=-107; Eastern limit=-83; Latitudinal range=15; Longitudinal range=24.
Egg Type: Benthic; Pelagic larva.
Feeding Group: Carnivore.
FishBase Habitat: Demersal.
Global Endemism: Tropical Eastern Pacific (TEP) endemic; East Pacific endemic; All species.
Habitat: Sand & gravel; Soft bottom (mud, sand,gravel, beach, estuary & mangrove); Soft bottom only.
Inshore Offshore: Inshore; Inshore Only.
IUCN Red List: Not evaluated / Listed.
Length Max: 9.6 cm.
Regional Endemism: Continent; Continent only; TEP endemic; Continental TEP endemic; Mexican province endemic; All species.
Residency: Resident.
Salinity: Marine; Marine Only.
Water Column Position: Bottom; Bottom only;
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Names |
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Links to other sites |
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References |
- Dawson, C.E., 1976., Studies on eastern Pacific sand stargazers. 3. Dactylagnus and Myxodagnus with description of a new species and subspecies., Copeia, 1976(1):13-43.
- Findley, L.T., Hendrickx, M.E., Brusca, R.C., van der Heiden, A.M., Hastings, P.A., Torre, J., 2003., Diversidad de la Macrofauna Marina del Golfo de California, Mexico., CD-ROM versión 1.0. Projecto de la Macrofauna del Golfo . Derechos reservados de los autores y Conservación Internacional.
- Hildebrand, S.F., 1946., A descriptive catalog of the shore fishes of Peru., Bull. U.S. Nat. Mus., 189:1-530.
- Lopez , M. I. and Bussing, W. A., 1982., Lista provisional de los peces marinos de la Costa Rica., Revista de Biologia Tropical, 30(1):5-26.
- Van der Heiden , A. M. and Findley, L. T., 1988., Lista de los peces marinos del sur de Sinaloa, México., Anales del Centro de Ciencias del Mar y Limnologia de la Universidad Autonoma Nacional de Mexico, 15:209-224.
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Acknowledgements |
I thank Ashley MacDonald and John Pickering, University of Georgia, for technical support in building this page.
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http://www.fishbase.org/Summary/speciesSummary.php?genusname=Myxodagnus&speciesname=macrognathus ---> http://192.134.151.83/Summary/speciesSummary.php?genusname=Myxodagnus&speciesname=macrognathus http://192.134.151.83/Summary/speciesSummary.php?genusname=Myxodagnus&speciesname=macrognathus ---> https://fishbase.mnhn.fr/Summary/speciesSummary.php?genusname=Myxodagnus&speciesname=macrognathus https://fishbase.mnhn.fr/Summary/speciesSummary.php?genusname=Myxodagnus&speciesname=macrognathus ---> https://fishbase.mnhn.fr/summary/Myxodagnus-macrognathus.html
Myxodagnus macrognathus
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drawing shows typical species in Dactyloscopidae.
Teleostei (teleosts) >
Blenniiformes
(Blennies) >
Dactyloscopidae
(Sand stargazers)
Etymology:
Myxodagnus:
Greek, myxos = mucus + Greek, agnos = pure (Ref.
45335
)
.
More on author:
Hildebrand
.
Environment: milieu / climate zone / depth range / distribution range
Ecology
Marine; demersal. Tropical
Southeast Pacific: Mexico and Peru.
Size / Weight / Age
Maturity: L
m
 
?
  range ? - ? cm
Max length : 6.0 cm SL (female)
Short description
Morphology
|
Morphometrics
Dorsal
spines
(total): 9 - 11;
Dorsal
soft rays
(total): 27-31;
Anal
soft rays
: 36 - 39. A large species with modal counts of 10 dorsal spines, 40 total dorsal fin supports, 37 segmented anal rays, 15 pectoral rays, two preopercular canal pores and 5 predorsal bones; upper lip fimbriae usually 9-10; eye diameter greater than preorbital length; lateral line interrupted or complete (Ref.
39697
).
Life cycle and mating behavior
Maturity
|
Reproduction
|
Spawning
|
Eggs
|
Fecundity
|
Larvae
Dawson, C.E.
, 1976. Studies on eastern Pacific sand stargazers 3.
Dactylagnus
and
Myxodagnus
, with description of a new species and subspecies. Copeia 1976(1):13-43. (Ref.
39697
)
IUCN Red List Status (Ref.
130435
)
Least Concern (LC)
; Date assessed:
25 May 2007
CITES
Not Evaluated
Not Evaluated
Threat to humans
Harmless
Human uses
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Estimates based on models
Phylogenetic diversity index (Ref.
82804
): PD
50
= 0.5312 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.01000 (0.00244 - 0.04107), b=3.04 (2.81 - 3.27), in cm total length, based on all LWR estimates for this body shape (Ref.
93245
).
Trophic level (Ref.
69278
): 4.3 ±0.7 se; based on size and trophs of closest relatives
Fishing Vulnerability (Ref.
59153
): Low vulnerability (10 of 100).
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- 20 July 2016
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Updated: 2024-06-04 14:26:24 gmt
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