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New Geographical Records of Nine Species of Crustaceans from Southern Baja California, Mexico.

Universidad Autonoma de Baja California Sur, Departamento de Biologia Marina, Proyecto Fauna Arrecifal, Apdo. Postal 19-b, La Paz, B.C.S. Mexico C.P. 23080. Phone (112) 8-08-01; RP:rtimon@hotmail.corn CS.csanchez@calafia.uabcs.mx

Surveys on Baja California coasts allow us to report new geographical records of 9 species of crustaceans (1 stomatopod, 5 caridean shrimps and 3 brachyuran crabs). The new records update those of Wicksten & Hendrickx (1992), Hendrickx (1995) and Hendrickx & Landa-Jaime (1997). The following abbreviations are used: total length, TL; carapace width, CW; carapace length, CL.

Order Stomatopoda

Family Squillidae

Squilla tiburonensis Schmitt 1940

Previous distribution.--From Consag Rock to Espiritu Santo and Punta Piaxtla Gulf of California, Mexico (Hendrickx & Salgado-Barragdn 1991).

New records.--3 males (TL 77--87 mm) and 6 females (TL 60--84 mm), taken on December 21, 1997 during shrimp trawling operations, depth 58.7 m, Asuncion Bay, 27[degrees]06'45" N, 114[degrees]15'43" W, west coast of Baja California, Mexico.

Order Decapoda

Family Alpheidae

Synalpheus biunguiculatus (Stimpson 1860)

Previous distribution.--Guaymas, Gulf of California, Mexico to Colombia; Clarion, Clipperton and Malpelo Islands; Hawaii (Wicksten & Hendrickx 1992).

New records.--1 ovigerous female (TL 24.8 mm), March 3, 1998, collected in lobster larvae traps, depth 6 m, Punta Abreojos, 26[degrees]45'40" N, 113[degrees]30'58" W, west coast of Baja California, Mexico.

Family Hippolytidae

Hippolyte williarnsi Schmitt 1924

Previous distribution.--Puerto Penasco, Gulf of California, Mexico to Mejillones Bay, Chile; Galapagos Islands (Wicksten & Hendrickx 1992).

New records.--4 males (TL 14.7--18.9 mm), 5 females (TL 13.2--18.6 mm) and 12 ovigerous females (TL 15.8--19.4 mm), March 3, 1998, collected in lobster larvae traps, depth 6 m, Punta Abreojos, 26[degrees]45'40" N, 113[degrees]30'58" W, west coast of Baja California, Mexico.

Thor cordelli Wicksten 1996

Previous distribution.--Rocas Alijos and Clarion Island, Mexico; Punta Alta, Colombia (Wicksten 1996).

New records.--1 ovigerous female, (TL 14.1 mm), March 3, 1998, collected in lobster larvae traps, depth 6 m, Punta Abreojos, 26[degrees]45'40" N, 113[degrees]30'58" W, west coast of Baja California, Mexico.

Family Palaemonidae

Neopontonides dentiger Holthuis 1952

Previous distribution.--Baluarte River, Sinaloa, Mexico to Cabo San Francisco, Ecuador (Wicksten & Hendrickx 1992).

New records.--1 male (TL 24.6 mm) and 2 ovigerous females (TL 27.2--27.7 mm), March 3, 1998, collected in lobster larvae traps, depth 6 m, Punta Abreojos, 26[degrees]45'40" N, 113[degrees]30'58" W, west coast of Baja California, Mexico.

Palaemonetes hiltoni Schmitt, 1921

Previous distribution.--San Pedro, U.S.A; Guaymas and Caimanero Lagoon, Gulf of California, Mexico (Wicksten & Hendrickx 1992).

New records.--7 males (TL 22--32.5 mm), 12 females (TL 22--30.7 mm) and 3 ovigerous females (TL 33.7--34.9 mm), March 3, 1998, collected in lobster larvae traps, depth 6 m, Punta Abreojos, 26[degrees]45'40" N, 113[degrees]30'58" W, west coast of Baja California, Mexico.

Remarks.--Wicksten (1989) remarked that this species "has not been reported from Southern California since its description in 1921." Palaemonetes hiltoni is rare on the Pacific coast of Baja California, existing predominantly in the Gulf of California: Sonora and Sinaloa, Mexico (Holthuis 1952).

Family Epialtidae

Acanthonyx petiveri H. Milne Edwards 1834

Previous distribution.--From Santa Maria Bay, west coast of Baja California, La Paz and Mazatlan, Gulf of California, Mexico to Valparaiso, Chile; Revillagigedo and Galapagos Islands; Western Atlantic (Hendrickx 1995).

New records.--2 males (CW 9.8--10.5 mm, CL 12.8--14 mm) on February 28, 1998, intertidal under rocks at Punta Abreojos, 26[degrees]42'30" N, 113[degrees]34'30" W, west coast of Baja California, Mexico.

Epialtus minimus Lockington 1877

Previous distribution.--From 28[degrees]12'N, west coast of Baja California, and throughout the Gulf of California to Acapulco, Mexico (Hendrickx 1995).

New records.--1 male (CW 9.5 mm, CL 10.5 mm) on February 28, 1998, intertidal, under rocks at Punta Abreojos, 26[degrees]42'30" N, 113[degrees]34'30" W, west coast of Baja California, Mexico.

Remarks.--The presence of this species outside the Gulf of California was considered an extralimital record (Garth 1958). Therefore, the record provided herein confirms the presence of Epialtus minimus on the west coast of Baja California.

Family Parthenopidae

Parthenope johngarthi Hendrickx & Landa-Jaime 1997

Previous distribution.--From Tenacatita Bay, Jalisco to Manzanillo, Colima, Mexico (Hendrickx & Landa-Jaime 1997).

New records. -- 1 male (CW 43 mm, CL 34 mm) and 1 female (CW 39 mm, CL 29 mm) taken on May 23, 1999 collected by J. Fiol with baited traps, depth 75 m, at La Ventana, 24[degrees]05'59" N, 109[degrees]57'08" W, La Paz, Gulf of California, Mexico.

Remarks.--This species has been recently described, the northern-most record of which was from Tenacatita Bay, Jalisco, Mexico. This is the first report in the Gulf of California and constitutes the northern-most record.

Acknowledgements

We thank M. C. Jose Salgado Barragan (ICMyL-UNAM), who confirmed the identification of the stomatopod. We also thank Dr. Mary K. Wicksten and Dr. Joel W. Martin for their comments, donors of the Birch Aquarium at Scripps, M. C. Jesus Fiol, Ms. Miriam Reza and Alexander Sanchez. The collecting trips were supported by the "Reef Fauna" and "Salitrales de San Ignacio" projects, the latter from Exportadora de Sal, S. A. (ESSA).

Literature cited

Garth, J. S. 1958. Brachyura of the Pacific coast of America, Oxyrhyncha. Allan Hancock Pac. Exp., 21: 1--584.

Hendrickx, M. E. 1995. Checklist of brachyuran crabs (Crustacea: Decapoda) from the eastern tropical Pacific. Bull. Inst. r. Sci. nat. Beig., 65: 125--150.

----- & J. Salgado-Barragan. 1991. Los estomatopodos (Crustacea: Hoplocarida) del Pacifico mexicano. Inst. cienc. del mar y Limn., Univ. nal. auton. Mexico Pubi. Esp., 10: 1--200.

----- & V. Landa-Jaime. 1997. A new species of Parthenope Weber (Crustacea: Brachyura: Parthenopidae) from the Pacific coast of Mexico. Bull. Inst. r. Sci. nat. Belg., 67: 95--100.

Holthuis. L. B. 1952. A general revision of the Palaemonidae (Crustacca Decapoda Natantia) of the Americas. II. 0cc. Pap. Allan Hancock Found., 12: 1--332 pp.

Lockington, W. N. 1877. Remarks on the Crustacea of the Pacific coast, with descriptions of some new species. Proc. Calif. Acad. Sci., 7: 28--36.

Milne Edwards, H. 1834. Histoire naturelle des Crustaces, comprenant l'anatomie, la physiologie et la classification de ces animaux. Paris, vol. 1, 468 pp.

-----. 1924. The Macrura and Anomura collected by the williams Galapagos Expedition, 1923. Zoologica, 5(15): 161--171.

-----. 1940. The stomatopods of the west coast of America based on collections made by the Allan Hancock Expeditions, 1933--38. Allan Hancock Pac. Exp., 5 (4): 129--225.

Stimpson, W. 1860. Prodromus descriptionis animalium evertebratorum, quae in Expeditione ad Oceanum Pacificum Septenetrionalem, a Republica Federata missa, D. Ringgold et J. Rodgers, Ducibus, observatit et descripsit. Proc. Acad. Nat. Sd. Philad., 22--48.

Wicksten, M. K. 1989. A key to the Palaemonid Shrimp of the Eastern Pacific Region. Bull, south. Calif. Acad. Sci., 88 (1): 11--20.

-----. 1996. A new species of hippolytid shrimp from Rocas Alijos. Pp. 295--298 in Rocas Alijos.

(R. W. Selimieder, ed.), Kluwer Academic Publishers, 481 pp.

----- & M. E. Hendrickx. 1992. Checklist of Penaeoid and Caridean Shrimps (Decapoda: Penaeoidea, Caridea) from the Eastern Tropical Pacific. Proc. Biol. Soc. San Diego, 9:1--9.

Accepted for publication 28 September 1999.
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Author:Pereyna, Ricardo T.; Sanchez, Carlos A.
Publication:Bulletin (Southern California Academy of Sciences)
Article Type:Directory
Geographic Code:1MEX
Date:Dec 1, 2000
Words:1196
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