Alpheus with sharp tooth directed anteromesiad from

 

 

Alpheus lottini Guérin-Méneville,
1838 in Guérin-Méneville, 1829-1838 

Common
name : Cauliflower coral
snapping shrimp; Lottin’s coral snapping shrimp. 

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Synonyms : Alpheus sublucanus (Forskal, 1775); Alpheus
ventrosus H. Milne Edwards, 1837; Alpheus laevis Randall,1840;
 Crangon latipes Banner, 1953, Alpheus rouxii Guérin-Méneville, 1857, Alpheus thetis White, 1847, Cancer (Astacus) sublucanus Forskål, 1775, Crangon latipes Banner, 1953

Distribution : Tropical Indo-Pacific from N Red Sea to S
Africa and across Indian Ocean and W Pacific to Japan, Australia, French
Polynesia, Hawaii, Easter Island to E Pacific, from S Gulf of California to
Galapagos and Panama.

Environment
: In
Coral ree ecosystemssespecially associated with pocilloporid corals; mostly seen lower intertidal and subtidal, to about 20 m in depth.

Size
:Maximum  30
mm in size

Collecttion
site : Vizhinjam, Thangasseri

Species
examined : 30 specimens examined, length maximum 25
mm

Description : Body somewhat but not extraordinarily compressed, not
twice as high as wide, not setose; rostrum reaching to about level of distal
margin of 1st antennular segment, base flattened, abruptly delimited
from adrostral furrows; carapace without median tooth or tubercle on gastric
region, without paired teeth overhanging posterior ends of adrostral furrows,
anterior margin between rostrum and orbital hood short, transverse, unarmed,
submarginal area not flattened, orbital hood armed with sharp tooth directed anteromesiad
from surface of hood, not marginal, adrostral furrows narrow and rather deep;
second antennular segment usually about 1 3/4th  times as long as wide; basal antennal segment
(basicerite) with strong, acute ventrolateral tooth nearly or quite
overreaching stylocerite; antennal scale with lateral margin faintly sinuous,
nearly straight, distolateral spine rather stout, overreaching distal margin of
tapered blade; 1st pereopods with inferior flexor margin of merus
terminating distally in strong but blunt projection; major chela compressed, about

 

 

 

 

 

 2 1/2nd
 times as long as wide, dactyl not
strongly arched, veering only slightly from longitudinal plane of chela, not double-ended,
bearing reasonably well-developed plunger, palm totally devoid of sculpture;
minor chela 2 1/2 to 3 times as long as wide, dactyl subequal to palm in
length, fairly slender, rather strongly hooked distally, not
“balaeniceps” in either sex; 2nd  pereopod with proximal carpal article nearly or
fully twice as long as 2nd ; 3rd  pereopod with dactyl stout, laterally
compressed, tip bluntly hoof-like, surrounded by ridge of soft chitin, propodus
bearing 5-7 rather stout spines on flexor margin, carpus with both extensor and
flexor margins produced distally, merus and ischium unarmed; maximum carapace
length to base of rostrum about 13 mm.

 

Remarks
: Alpheus lottini
comes under Sulcatus group. A  single
specimen showed difference in the stripe patterns.

Original description : Guérin-Méneville F.E. 1829-1838. Crustacés, Arachnides et
Insectes. In: Duperry, L.I., Voyage autour du monde, exécuté par Ordre du Roi,
sur la Corvette de Sa Majesté, La Coquille, pendant les années 1822, 1823, 1824
et 1825: 1-47, Plates 1-5.

 

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