Bollmannia marginalis — Details

Apostrophe Goby learn more about names for this taxon

Overview

Comprehensive Description

Description

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Common names: goby (English), gobio (Espanol)
 
Bollmannia marginalis Ginsburg, 1939


Apostrophe goby,     Margin-spot goby


Head & body compressed; body relatively slender (greatest depth 17-22.5% of SL); head rounded, elongate (25-33% of SL); eye large, 7-9% of SL; mouth large, very oblique; teeth in several rows; dorsal fin VII (spines very elongate, filamentous, often reaching tail fin base, 1st  & 2nd  spines longest in female, 5th  longest in male) + I, 13-15; anal I, 13-15; last rays of dorsal & anal reach base of tail fin; pectoral rays 23-25, reaches beyond origin of anal fin; pelvics fused to form disc, front margin of disc scalloped, reaches anus; tail base slender (least depth 8-10.5% of SL); tail fin long (~ 30% of SL), strongly pointed; scales large (25-28 rows along body), rough; 7-9 scales before dorsal fin; no scales on lower cheek, upper third of opercle covered with large scales; 1 large + 4-5 small scales on base of pectoral fin.


Body brownish, with orange spots; orange lines on head; a median row of 5-6 short double dark bars from behind head to tail fin base; 1st  dorsal with a black spot at the center rear; 2nd  dorsal with 2 rows of orange spots, separated by an orange stripe; no black band on upper lip; anal fin dusky, with orange spots; tail fin with orange spots, a black spot at its base; pelvic dark.


Size: 5.7 cm.

Habitat: benthic on soft bottoms.

Depth: 15-80 m.

Southern Gulf of California to Ecuador.

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Distribution

Range Description

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This species is endemic to the Eastern Pacific, and is only known from a few collections in the southern Gulf of California and central Mexico, and along the coast from Costa Rica to Ecuador (Bedenbaugh 1988).
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Depth

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Depth Range (m): 15 (S) - 80 (S)
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Zoogeography

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See Map (including site records) of Distribution in the Tropical Eastern Pacific


 
Global Endemism: All species, East Pacific endemic, Tropical Eastern Pacific (TEP) endemic

Regional Endemism: All species, TEP endemic, Continental TEP endemic, 3 provinces (Cortez + Mexican + Panamic) endemic, Continent, Continent only

Residency: Resident

Climate Zone: Northern Subtropical (Cortez Province + Sinaloan Gap), Northern Tropical (Mexican Province to Nicaragua + Revillagigedos), Equatorial (Costa Rica to Ecuador + Galapagos, Clipperton, Cocos, Malpelo)

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Eastern Pacific: Ecuador.
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Physical Description

Morphology

Size

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Length max (cm): 5.7 (S)
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Type Information

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Holotype for Bollmannia marginalis
Collection: Smithsonian Institution, National Museum of Natural History, Department of Vertebrate Zoology, Division of Fishes
Collector(s): W. Schmitt
Year Collected: 1935
Locality: Ecuador: Solango Bay Solango Island 12 Fms., Ecuador, Pacific
Depth (m): 22 to 22
  • Holotype:
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Ecology

Habitat

Habitat and Ecology

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Habitat and Ecology
This deep-water species lives on benthic muddy and sandy soft substrate at depths of 15 to 80 m.

Systems
  • Marine
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Depth range based on 10 specimens in 1 taxon.
Water temperature and chemistry ranges based on 1 sample.

Environmental ranges
  Depth range (m): 6.5 - 47.5
  Temperature range (°C): 23.629 - 23.629
  Nitrate (umol/L): 16.805 - 16.805
  Salinity (PPS): 34.631 - 34.631
  Oxygen (ml/l): 2.460 - 2.460
  Phosphate (umol/l): 1.485 - 1.485
  Silicate (umol/l): 12.680 - 12.680

Graphical representation

Depth range (m): 6.5 - 47.5
 
Note: this information has not been validated. Check this *note*. Your feedback is most welcome.
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Depth: 0 - 22m.
Recorded at 22 meters.

Habitat: demersal.
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Habitat

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Salinity: Marine, Marine Only

Inshore/Offshore: Inshore, Inshore Only

Water Column Position: Bottom, Bottom only

Habitat: Soft bottom (mud, sand,gravel, beach, estuary & mangrove), Soft bottom only, Mud, Sand & gravel

FishBase Habitat: Demersal
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Environment

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demersal; marine; depth range ? - 22 m (Ref. 26282)
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Trophic Strategy

Feeding

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Feeding Group: Carnivore, Planktivore

Diet: mobile benthic worms, mobile benthic crustacea (shrimps/crabs)
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Life History and Behavior

Reproduction

Reproduction

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Egg Type: Benthic, Pelagic larva
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Conservation

Conservation Status

IUCN Red List Assessment

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Red List Category
DD
Data Deficient

Red List Criteria

Version
3.1

Year Assessed
2010

Assessor/s
Van Tassell, J.

Reviewer/s
Carpenter, K., Polidoro, B., Livingstone, S. (Global Marine Species Assessment Team)

Contributor/s

Justification
This deep-water species is only known from a few disjunct localities in the Eastern Pacific region. More information is needed to determine this species' range, population status, habitat requirements, and threats. This genus is also in need of revision. It is listed as Data Deficient.
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Conservation status

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IUCN Red List: Not evaluated / Listed

CITES: Not listed
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Population

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Population
There is no population information available for this species.

Population Trend
Unknown
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Threats

Threats

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Major Threats
There are no major threats known for this species.
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Data deficient (DD)
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Management

Conservation Actions

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Conservation Actions
There are no known conservation measures for this species.
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