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Synalpheus latastei tenuispina Coutière

Comprehensive Description

provided by Smithsonian Contributions to Zoology
Synalpheus latastei tenuispina Coutière

Synalpheus latastei tenuispina Coutiére, 1909:26, fig. 8.

TYPE-LOCALITY.—Florianópolis, Estado de Santa Catarina, Brazil.

DISTRIBUTION.—The Atlantic form of this species is apparently known only from the type-locality. The typical form occurs in Peru and Chile.

*162. Synalpheus longicarpus (Herrick)

Alpheus saulcyi var. longicarpus Herrick, 1891 [part]:383, pl. 21: figs. 5–7, pl. 22: figs. 3, 11, 17, pl. 24: figs. 2, 4–9.

Synalpheus longicarpus.—Coutière 1909:53, fig. 31.—Williams 1965b: 73, fig. 59.

MATERIAL.—Virgin Gorda (Sta. 111–56: 2 spec.).—Saint Lucia Island (Sta. 41–56: 1 spec).—Mustique (Sta. 35–56: 194 spec. [75 ovig., 3 with branchial bopyrids, 6 with abdominal bopyrids]).—Tobago Cays (Sta. 22–56: 37 spec. [12 ovig., 3 with abdominal bopyrids]; Sta. 23–56: 8 spec [1 ovig.]; Sta. 24–56: 253 spec. [96 ovig., 4 with abdominal bopyrids]).—Tobago (Sta. 30–59: 9 spec [4 ovig.]).—Bahía de la Ascensión (Sta. 52–60: 10 spec).

HABITAT.—The two largest lots were taken from loggerhead sponges. Most of the other specimens were found in and under coral and coral rock.

TYPE-LOCALITY.—Bahamas [probably Nassau, New Providence].

DISTRIBUTION.—North Carolina and Bermudas to Curaçao and Islas Los Roques, westward to the Yucatan Peninsula; to a depth of 50 meters.

DISTRIBUTION.—Dry Tortugas to Barbados and the Yucatan Peninsula; sublittoral.

*164. Synalpheus minus (Say)

Alpheus minus Say, 1818:245.

?Alpheus saulcyi, var. brevicarpus Herrick, 1891:384, pl. 4: figs. 1–3, pl. 21: figs. 1–4, 8, 9, pl. 22: figs. 1, 2, 4–10, 12–16, pl. 23: figs. 1–8, pl. 24: figs. 1, 3.

Synalpheus minus.—Coutière 1909:43, fig. 25.

?Synalpheus brevicarpus.—Coutière 1909:50, fig. 29.

MATERIAL.—Tortola (Sta. 117–56: 4 spec. [2 ovig.]).—Guana Island (Sta. 9–58: 8 spec. [4 ovig.])–Virgin Gorda (Sta. 111–56: 8 spec. [2 ovig.]; Sta. 112–56: 3 spec. [1 ovig., 1 with branchial bopyrid]; Sta. 10–58: 6 spec.—Anguilla (Sta. 55–58: 1 ovig. ).—Barbuda (Sta. 85–56: 2 spec; Sta. 113a–58: 1 spec; Sta. 98–59: 3 spec. [1 ovig.]; Sta. 102–59: 2 spec. [1 ovig.]).—Saint Christopher (Sta. 103–56: 1 ovig. ).—Antigua Island (Sta. 73–56: 5 spec. [4 ovig.]; Sta. 75–56: 1 spec; Sta. 104–59: 1 spec; Sta. ?–59: 1 spec).—Guadeloupe (Sta. 69–56: 7 spec. [2 ovig.]; Sta. 70–56: 3 spec. [1 ovig.]).—Dominica (Sta. 75–59: 2 spec).—Saint Lucia Island (Sta. 47–56: 1 spec).—Tobago Cays (Sta. 22–56: 11 spec. [5 ovig.]; Sta. 23–56: 4 spec. [1 ovig.]).—Carriacou Island (Sta. 16–56: 9 spec. [2 ovig.]).—Tobago (Sta. 4–59: 1 spec; Sta. 8–59: 13 spec. [5 ovig., 1 with branchial bopyrid]; Sta. 15–59: 3 spec; Sta. 26–59: 4 spec; Sta. 31–59: 19 spec. [3 ovig., 1 with branchial bopyrid]).—Isla Mujeres (Sta. 28–60: 2 spec. [1 with branchial bopyrid]).—Isla de Cozumel (Sta. 106–60: 4 spec. [1 ovig.]; Sta. 109–60: 3 spec. [1 ovig.]).—Bahía de la Ascensión (Sta. 45–60: 1 ovig.; Sta. 52–60: 10 spec. [1 ovig.]; Sta. 67–60: 5 spec; Sta. 72–60: 1 spec.).—Bahía del Espíritu Santo (Sta. 41–60: 9 spec.).

HABITAT.—Apparently S. minus occurs in any habitat that provides a suitable hiding place, such as sponges, eroded dead coral and coral rock, abandoned gastropod shells, and beneath stones and Porites and Pocillopora on grass flats.

TYPE-LOCALITY.—“Coasts of the southern states, and of East Florida.”

DISTRIBUTION.—North Carolina and the Bermudas to Estado de Alagoas, Brazil; to a depth of 68 meters.

MATERIAL.—Bahía de la Ascensión (Sta. 52–60: 3 , 2 ovig. ).—Bahía del Espíritu Santo (Sta. 41–60: 3 , 1 ovig. [1 is holotype, USNM 135372]).

DESCRIPTION.—Rostrum (Figures 37a, b) broadly triangular, subrectangular, not nearly reaching distal margin of first segment of antennular peduncle; no process extending ventrally from near base of rostrum. Ocular hoods shallowly separated from rostrum by rounded sinuses, forming bluntly obtuse teeth falling slightly short of level of tip of rostrum. Pterygostomial angle of carapace strongly produced as acute lobe.

Pleuron of first abdominal somite of male (Figure 37c) subrectangular or slightly acute posteroventrally, rounded anteroventrally; pleura of second and third somites broadly rounded, of fourth somite angularly rounded, of fifth somite bluntly acute, of sixth somite rounded. Adult female with pleura of 4 anterior somites broadly rounded, of fifth somite bluntly acute, of sixth somite rounded. Telson (Figure 37d) trapezoidal with sinuous lateral margins and broadly convex posterior margin; dorsal surface strongly depressed in midline, armed laterally with 2 pairs of strong spines, anterior pair situated near midlength of telson, posterior pair about halfway between anterior pair and posterior margin of telson; distal margin armed with 2 pairs of spines and 6 pairs of long setae, mesial pair of spines unusually long and slender, at least four times as long as lateral pair.

Stylocerite of antennular peduncle terminating in broad blunt tip distinctly overreaching distal margin of basal antennular segment. Segments of antennular peduncle rather short and broad, second segment slightly longer than third.

Antennal scale reaching to about midlength of third segment of antennular peduncle; blade well developed in both males and females, falling only slightly short of tip of lateral spine. Basal segment of peduncle angularly rounded dorsally; lateral spine short and invisible in dorsal view, reaching about as far as level of extremities of ocular hoods. Distal segment of peduncle about three and one-half times as long as broad, overreaching antennular peduncle by about one-tenth of length.

Mouth parts as figured (Figures 37e–j). Mandible with 6 marginal teeth on incisor process, molar process somewhat reduced. Palp of first maxilliped consisting of 2 segments. Third maxilliped overreaching antennal peduncle by about one-third of distal segment, exopod reaching about to end of antepenultimate segment.

Major first pereiopod (Figure 38a) overreaching antennal peduncle by entire length of chela. Chela about two and one-seventh times as long as wide. Fingers (Figure 38b) about two-fifths as long as palm; movable finger opening and closing in oblique plane because of torsion of chela. Palm terminating dorsodistally in stout tooth curving distoventrally. Carpus very short and broad. Merus unarmed, fully half as long as palm. Minor first pereiopod (Figure 38c) overreaching antennal peduncle by nearly half of chela. Chela slightly more than two and one-half times as long as broad. Fingers not bidentate; movable finger stout, without fringe of hairs on extensor margin, with partial carina on flexor side of chela paralleling carinate opposable margin. Carpus short, less than one-fourth as long as chela. Second pereiopod (Figure 38d) overreaching antennal peduncle by chela and two and one-half distal articles of carpus. Fingers not quite one and one-half times as long as palm. Carpus fully one and three-fourths times as long as chela, composed of 5 articles; proximal article not quite as long as combined lengths of distal 4; second, third, and fourth articles subequal, each about half as long as fifth. Merus slightly shorter than carpus and about 1.2 times as long as ischium. Third, fourth, and fifth pereiopods with dactyls of moderate length, biunguiculate; flexor terminal process slightly divergent from curve of segment, shorter and basally more slender than extensor process. Third pereiopod (Figures 38e, f) overreaching antennal peduncle by dactyl and one-third of propodus; propodus slightly less than three and one-half times as long as dactyl, flexor margin armed throughout length with about 5 movable spinules in addition to distal one; carpus about two-thirds as long as propodus, armed with movable spinule at distal end of flexor margin; merus unarmed, slightly less than one and two-fifths times as long as propodus. Fourth pereiopod (Figures 38g, h) reaching slightly beyond midlength of antennal peduncle; propodus about three times as long as dactyl, flexor margin armed throughout length with 4 movable spinules in addition to distal one; carpus two-thirds as long as propodus, with movable spinule at distal end of flexor margin; merus unarmed; one and one-fourth times as long as propodus. Fifth pereiopod (Figures 38i, j) reaching about to midlength of antennal peduncle; propodus about five times as long as dactyl, flexor margin armed with indistinct spinule proximal to midlength in addition to similar distal one and with 5 oblique rows of setae in distal half; carpus unarmed, slightly more than four-fifths as long as propodus; merus unarmed, subequal to propodus in length.

Appendix interna (Figure 38m) on second to fifth pleopods in both sexes. Lateral branch of uropod (Figure 37d) with lateral margin faintly sinuous and unarmed proximal to deeply and widely separated pair of prominent fixed spines flanking long but slender movable spine.

Eggs few and large, more than 1 mm in length.

SIZE.—Males with carapace lengths, to base of rostrum, of 1.8 to 3.3 mm (holotype, 3.0 mm); ovigerous females, 3.6 to 3.75 mm.

HABITAT.—In dead coral in less than 10 feet of water.

TYPE-LOCALITY.—West side of reef east of anchorage, Bahía del Espíritu Santo, Territorio de Quintana Roo, Mexico.

DISTRIBUTION.—East coast of Yucatan Peninsula; sublittoral.
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bibliographic citation
Chace, Fenner Albert, Jr. 1972. "The shrimps of the Smithsonian-Bredin Caribbean Expeditions with a summary of the West Indian shallow-water species (Crustacea: Decapoda: Natantia)." Smithsonian Contributions to Zoology. 1-179. https://doi.org/10.5479/si.00810282.98