Overview

Comprehensive Description

Description

"One is from Minikoi, the other from the Maldives."

Alcock, 1905; pg. 831

NOTE: Pagurus scabrimanus is nowhere listed in today's taxonomy. There is a good chance that the species has been remanmed Dardanus scabrimanus, though it is certainly not definitive. As deduced from Fauna and Geography of the Maldive and Laccadive Archipelagoes, even Gardiner and Alcock seemed quite doubtful in deciding how to categorize or name this specimen.

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Sekerci, Kristin

Source: Maldives and Laccadives

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Description

"Anterior feet rarely subequal, the left usually the larger; fingers moving in a vertical plane, corneous at tips, spoon-excavate. Front not rostrate."

Dana, 1852; pg. 449

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Sekerci, Kristin

Source: Maldives and Laccadives

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Distribution

"Philippines, ?Red Sea, ?Minikoi and Maldives."

Alcock, 1905; pg. 831

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Sekerci, Kristin

Source: Maldives and Laccadives

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Physical Description

Morphology

"Very near the fabimanus in form of carapax, hands, and basal scale to eye. Eyes slightly shorter, longer than base of outer antannae, but hardly longer than inner. Larger hand not tomentose externally, nearly naked, granuli-scabrous, spinulous on upper margin, denticulate or crenulate on lower, moveable finger hardly spinuous above, carpus spinulous above and also on outer surface near apex. Feet of two following pairs hirsute, tarsi very long, tarsus of left foot of third pair not subtriangular, outer surface not flat, and not tomentose, upper margin minute spinulous.

Length, one to one and one-fourth inches. [about 2-3 cm] The form of the tarsus of the left leg of third pair, distinguishes this species readily from the fabimanus, which it so much resembles. The outer surface of the hand is also spinulous toward the upper edge, and the carpus has two or three small spines on the outer surface near the apical margin."

Dana, 1852; pg. 456

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Sekerci, Kristin

Source: Maldives and Laccadives

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Look Alikes

"Two small specimens very closely resembling Pagurus] fabimanus [Dardanus scutellatus], but differing therefrom in the shorter eyestalks, larger eyes, and different form and sculpture of the two terminal joints of the 3rd left leg, are doubtfully referred to this species."

Alcock, 1905; pg. 831

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Sekerci, Kristin

Source: Maldives and Laccadives

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Ecology

Habitat

Depth range based on 9819 specimens in 103 taxa.
Water temperature and chemistry ranges based on 4867 samples.

Environmental ranges
  Depth range (m): -99 - 25000
  Temperature range (°C): -1.377 - 27.741
  Nitrate (umol/L): 0.090 - 44.379
  Salinity (PPS): 22.343 - 38.793
  Oxygen (ml/l): 0.262 - 8.585
  Phosphate (umol/l): 0.035 - 3.232
  Silicate (umol/l): 0.756 - 127.985

Graphical representation

Depth range (m): -99 - 25000

Temperature range (°C): -1.377 - 27.741

Nitrate (umol/L): 0.090 - 44.379

Salinity (PPS): 22.343 - 38.793

Oxygen (ml/l): 0.262 - 8.585

Phosphate (umol/l): 0.035 - 3.232

Silicate (umol/l): 0.756 - 127.985
 
Note: this information has not been validated. Check this *note*. Your feedback is most welcome.

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Associations

Known predators

Pagurus (Hermit crabs) is prey of:
Myoxocephalus
Cribina
Actinopterygii
Dasyatis sabina
Arius felis
Urophycis floridana
Prionotus scitulus
Prionotus tribulus
Sciaenops ocellatus
Bucephala albeaola
Rallus longirostris
Charadrius semipalmatus
Lophodytes cucullatus
Tringa melanoleuca
Catoptrophorus semipalmatus
Larus argentatus
Larus delawarensis
Larus atricilla
Sterna forsteri
sediment POC
Pinixia floridana
Neopanope texana
Callinectes sapidus

Based on studies in:
USA: Massachusetts, Cape Ann (Marine, Sublittoral)
USA: California, Cabrillo Point (Littoral, Rocky shore)
USA: Florida (Estuarine)

This list may not be complete but is based on published studies.
  • Christian RR, Luczkovich JJ (1999) Organizing and understanding a winter’s seagrass foodweb network through effective trophic levels. Ecol Model 117:99–124
  • R. W. Dexter, The marine communities of a tidal inlet at Cape Ann, Massachusetts: a study in bio-ecology, Ecol. Monogr. 17:263-294, from p. 272 (1947).
  • W. G. Hewatt, Ecological studies on selected marine intertidal communities of Monterey Bay, California, Am. Midl. Nat. 18(2):161-206, from p. 196 (1937).
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Known prey organisms

Pagurus (Hermit crabs) preys on:
detritus
Chalina
Mytilus
Sertularia
Abietinaria
Metridium
Lichenophora
Lumbrinereis
Clymenella
Gammarus
Talorchestia
Solemya
Ensis
Macoma
Onoba
Littorina littorea
Crago
Cerebratulus
Nereis
Glycera
Polinices
Nassarius
algae
bacteria
Microfauna
meiofauna

Based on studies in:
USA: Massachusetts, Cape Ann (Marine, Sublittoral)
USA: California, Cabrillo Point (Littoral, Rocky shore)
USA: Florida (Estuarine)

This list may not be complete but is based on published studies.
  • Christian RR, Luczkovich JJ (1999) Organizing and understanding a winter’s seagrass foodweb network through effective trophic levels. Ecol Model 117:99–124
  • R. W. Dexter, The marine communities of a tidal inlet at Cape Ann, Massachusetts: a study in bio-ecology, Ecol. Monogr. 17:263-294, from p. 272 (1947).
  • R. W. Dexter, The marine communities of a tidal inlet at Cape Ann, Massachusetts: a study in bio-ecology, Ecol. Monogr. 17:263-294, from p. 284 (1947).
  • W. G. Hewatt, Ecological studies on selected marine intertidal communities of Monterey Bay, California, Am. Midl. Nat. 18(2):161-206, from p. 196 (1937).
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Molecular Biology and Genetics

Molecular Biology

Statistics of barcoding coverage

Barcode of Life Data Systems (BOLD) Stats
Specimen Records:833
Specimens with Sequences:753
Specimens with Barcodes:682
Species:33
Species With Barcodes:26
Public Records:537
Public Species:18
Public BINs:27
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Statistics of barcoding coverage: Pagurus sp.

Barcode of Life Data Systems (BOLDS) Stats
Public Records: 0
Specimens with Barcodes: 11
Species With Barcodes: 1
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Statistics of barcoding coverage: Pagurus cf. rathbuni

Barcode of Life Data Systems (BOLDS) Stats
Public Records: 0
Specimens with Barcodes: 8
Species With Barcodes: 1
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Barcode data

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Wikipedia

Pagurus

Pagurus is a genus of hermit crabs in the family Paguridae. Like other hermit crabs, their abdomen is not calcified and they use snail shells as portable homes. These marine decapod crustaceans are omnivorous, but mostly prey on small animals and scavenge carrion. Trigonocheirus and Pagurixus used to be considered subgenera of Pagurus, but the former is nowadays included in Orthopagurus, while the latter has been separated as a distinct genus.[3]

Species[edit]

Some 170 species are presently placed in Pagurus; many others have been placed here at one time or another but are now assigned to other genera of Paguroidea. Usually, a few new species are discovered each year. The following list is current as of June 2012:[3]

Long-armed hermit crab, Pagurus longicarpus
Hairy hermit crab, Pagurus hirsutiusculus, outside its shell – note the soft-shelled and curved abdomen (top of photo)

The following are all nomina nuda. They have never been validly described as new species, but only mentioned under these names:[3]

References[edit]

  1. ^ Johan Christian Fabricius (1775). Systema Entomologiae, sistens Insectorum Classes, Ordines, Genera, Species, adjectis Sysnonymis, Locis, Descriptionibus, Observationibus (in Latin). Flensburg & Leipzig: Officina Libraria Kortii. pp. 1–832. 
  2. ^ Patsy A. McLaughlin, Tomoyuki Komai, Rafael Lemaitre & Dwi Listyo Rahayu (2010). "Part I – Lithodoidea, Lomisoidea and Paguroidea" (PDF). In Martyn E. Y. Low and S. H. Tan. "Annotated checklist of anomuran decapod crustaceans of the world (exclusive of the Kiwaoidea and families Chirostylidae and Galatheidae of the Galatheoidea)". Zootaxa. Suppl. 23: 5–107. 
  3. ^ a b c Michael Türkay (2010). Patsy McLaughlin, ed. "Pagurus Fabricius, 1775". World Paguroidea database. World Register of Marine Species. Retrieved June 25, 2012. 
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