Alpheus crinitus Dana 1852

Alpheus crinitus Dana, 1852

Alpheus crinitus Dana, 1852a:21 [type locality: Balabac Strait]; 1852b:548, pl. 34: fig. 8.—D.M. and A.H. Banner, 1978:221.

DIAGNOSIS.—(Crinitus Group). Body not unusually compressed or setose; rostrum large, overreaching 1st antennular segment, carinate in midline, base not abruptly delimited from adrostral furrows; orbital hoods unarmed; 2nd antennular segment about 4 times as long as wide; major chela slightly compressed, 2 times as long as wide, without sculpture, smooth, slightly pubescent, dactyl not double-ended; minor chela 3 times as long as wide, lightly pubescent, fingers slightly shorter than palm; 2nd pereopod with proximal carpal article slightly shorter than 2nd; 3rd pereopod lightly pubescent, with dactyl pointed, simple, propodus with about 4 pairs of spinules on flexor margin, merus with acute distal tooth on flexor margin; carapace length to base of rostrum about 7 mm.

RANGE.—Recorded from the Red Sea, in addition to the type locality in Balabac Strait, the southernmost passage between the Sulu Sea and the South China Sea.

*17. Alpheus crockeri (Armstrong, 1941)

Crangon crockeri Armstrong, 1941:8, figs. 2, 3 [type locality: Matautu Bay, Savai'i, Western Sarnoa; coral in shallow water].

Crangon tuthilli A.H. Banner, 1953:63, fig. 19 [type locality: off southwest Oahu, Hawaii; 12 to 107 meters].

Alpheus crockeri.—Crosnier and Forest, 1966:225, figs. 4, 5.—A.H. and D.M. Banner, 1966b:84, fig. 28.

DIAGNOSIS.—(Macrocheles Group). Body not unusually compressed or setose; rostrum prominent but not nearly reaching as far as distal margin of elongate 1st antennular segment, rounded dorsally, base not abruptly delimited from adrostral furrows; carapace without median tooth or tubercle or paired large acute teeth on gastric region, anterior margin concave and unarmed mesial to orbital hoods, meeting rostral margin at somewhat less than right angle, region not flattened, orbital hoods armed with acute marginal teeth, adrostral furrows shallow; 2nd antennular segment about twice as long as wide; basal antennal segment (basicerite) armed with strong ventrolateral spine not overreaching stylocerite; antennal scale with lateral margin slightly concave, distolateral spine rather weak, distinctly but not far overreaching tapered blade; 1st pereopods with merus armed with acute distal tooth on inferior flexor margin; major chela compressed, about 3 times as long as maximum width, dactyl rather sharply angled toward flexor side of chela, not clearly double-ended, mesially laminate except near opposable margin, forming high, sharp dorsal crest, bulbous distally, plunger reduced to small blunt triangle, palm with acute tooth each side of dactylar articulation, blunt carina supporting tooth on mesial side of dactylar articulation entire, not interrupted by transverse notch, without “saddle” proximal to adhesive plaque, with very low, broadly rounded shoulder on margin proximal to fixed finger; minor chela about 4 times as long as maximum width, dactyl slender, slightly longer than palm, not “balaeniceps” or carinate on extensor margin; 2nd pereopod with proximal carpal article about 1 times as long as 2nd; 3rd pereopod with dactyl simple, sharp, propodus with 7 to 9 spiniform setae on flexor margin, merus unarmed, ischium with mobile spine; maximum carapace length probably about 8 mm.

MATERIAL—PHILIPPINES. South of Itbay Island, Batan Island; sta 5321; 20°18′30″N, 121°51′15″E; 48 m; white sand, coral, broken shells; 9 Nov 1908 (1125–1129); 9’ Johnston oyster dredge: 1 female [5.3].

RANGE.—Réunion, Andaman Sea coast of peninsular Thailand, Gulf of Thailand, Philippines, Indonesia, Mariana and Samoan islands and Hawaii in the Pacific Ocean and the islands of Sao Tomé and Annobon in the eastern Atlantic; intertidal to 50 meters.

*18. Alpheus davaoensis, new species

DIAGNOSIS.—(Crinitus Group). Body neither unusually compressed nor densely setose; rostrum minute, barely visible (Figure 2a), carinate in extreme anterior part, carina becoming indistinct on anterior gastric region but more apparent on posterior gastric region and extending posteriorly as barely visible line to about midlength of carapace, base not abruptly delimited from adrostral furrows; carapace without median tooth or tubercle or paired acute teeth on gastric region, anterior margin unarmed, forming slightly flattened convex lobe either side of rostrum protruding anteriorly beyond margin of orbital hoods, orbital hoods unarmed, rostral furrows moderately deep anteriorly; 2nd antennular segment slightly less than twice as long as wide; basal antennal segment (basicerite) unarmed; antennal scale with lateral margin rather strongly and regularly concave, distolateral spine not very stout, far overreaching semicircular distal margin of greatly reduced blade; 1st pereopods (Figure 2e,h) with merus armed with acute subdistal tooth on inferior flexor margin; major chela (Figure 2f) subcylindrical, fully 2 times as long as maximum width, dactyl bent slightly toward flexor side of chela, not really double-ended, bearing very short, truncated, distally concave plunger, acutely prominent proximally (Figure 2g), palm without sculpture except for faint sulcus proximal to adhesive plaque; minor chela (Figure 2i,j) 3 times as long as wide, dactyl slender, fingers as long as palm, rather deeply excavate on opposable margins; both 2nd pereopods missing; 3rd pereopod (Figure 2k,l) with dactyl hooked, obscurely biunguiculate, propodus bearing about 9 spines on flexor margin, carpus not distinctly armed, merus armed with strong distal tooth on flexor margin, ischium without movable spine; carapace length 4 mm.

MATERIAL.—PHILIPPINES. Davao Gulf, Mindanao: sta 5253; 7°04′48″N, 125°39′38″E; 51 m; coral; 18 May 1908 (1347–1358); 6’ Johnston oyster dredge; 1 female [4.0], holotype (USNM 205661).

TYPE LOCALITY.—Same as above.

RANGE.—Known only from the unique female holotype from Davao Gulf, Mindanao, Philippines; 51 meters.

MATERIAL.—PHILIPPINES. Grand Island, Subic Bay, Luzon [14°46′N, 120°14′E]; 2–6 m; scattered clumps of coral; 8 Jan 1908 (1300–1730); dynamite: 1 female [7.7].

RANGE.—Red Sea, eastern and South Africa through the Indian Ocean to Japan and Australia, and eastward across the Pacific to Hawaii.