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Myxodagnus macrognathus Hildebrand, 1946
LONG-JAWED SAND-STARGAZER
Life   Vertebrata   Fish   Dactyloscopidae   Myxodagnus

Myxodagnus macrognathus
© Copyright Ross Robertson, 2006 · 12
Myxodagnus macrognathus

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Myxodagnus macrognathus
© Copyright Photographer/SFTEP, 2002 · 0
Myxodagnus macrognathus
Myxodagnus macrognathus
© Copyright Photographer/SFTEP, 2002 · 0
Myxodagnus macrognathus
español

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;


Names
Scientific source:

Links to other sites

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.

Acknowledgements

I thank Ashley MacDonald and John Pickering, University of Georgia, for technical support in building this page.


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http://192.134.151.83/Summary/speciesSummary.php?genusname=Myxodagnus&speciesname=macrognathus ---> https://fishbase.mnhn.fr/Summary/speciesSummary.php?genusname=Myxodagnus&speciesname=macrognathus
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