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New records of decapod crustaceans in the eastern Pacific

In: Crustaceana
Authors:
Michel E. Hendrickx1Laboratorio de Invertebrados Bentónicos, Unidad Académica Mazatlán, Instituto de Ciencias del Mar y Limnología, Universidad Nacional Autónoma de México, P.O. Box 811, Mazatlán, Sinaloa, 82000, Mexico

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Mary K. Wicksten2Department of Biology, Texas A & M University, College Station, TX 77843-3258, U.S.A.

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New records are provided for four species of decapod crustaceans in the eastern Pacific. Hymenopenaeus nereus (Faxon, ) was collected further north and further from the coast than previously known. The distribution of Heterocarpus hostilis Faxon, is extended from off Panama to off Mexico. Parhippolyte cavernicola Wicksten, , previously known only from the type locality in the Gulf of California, Mexico, has been found in a cave in the Galapagos Islands, Ecuador. Moloha faxoni (Schmitt, ) is reported for the first time within the Gulf of California, Mexico.

Abstract

New records are provided for four species of decapod crustaceans in the eastern Pacific. Hymenopenaeus nereus (Faxon, 1893) was collected further north and further from the coast than previously known. The distribution of Heterocarpus hostilis Faxon, 1893 is extended from off Panama to off Mexico. Parhippolyte cavernicola Wicksten, 1996, previously known only from the type locality in the Gulf of California, Mexico, has been found in a cave in the Galapagos Islands, Ecuador. Moloha faxoni (Schmitt, 1921) is reported for the first time within the Gulf of California, Mexico.

INTRODUCTION

Multiple records of marine species are important as they allow a more accurate analysis of their geographic distribution and their zoogeographic affinities. New records are occasionally very significant because they considerably increase the distribution range of species previously believed to be endemic to a certain region or province. With the notable exception of isolated oceanic islands or seamounts, no species registered exclusively in very small areas (e.g., the type locality, a bay, an estuary) should be considered endemic. Dispersal mechanisms of larvae through pelagic phase or active dispersal of adults by swimming or crawling over time allow for transport of species over large distances.

Over the last decades increasing sampling efforts in the eastern Pacific, south of the U.S. border, have led to numerous new records and the discovery of many new species of decapod crustaceans. This is particularly true for pelagic and deep-sea benthic invertebrate communities (see Guzman, 2008; Hendrickx, 2012, 2015). In this paper we provide significant new records for four species of decapod crustaceans collected along and offshore of the west coast of the American continent.

All specimens are deposited in the Regional Marine Invertebrates Collection in Mazatlán, Mexico (ICML-EMU).

TAXONOMIC ACCOUNT

Dendrobranchiata Family Solenoceridae Hymenopenaeus nereus (Faxon, 1893)

Haliporus nereus Faxon, 1893: 213; 1895: 189, pl. 48, figs. 1, 1d; Bouvier, 1906: 3; 1908: 80; De Man, 1911: 7.

Hymenopenaeus nereus.— Burkenroad, 1936: 104; 1938: 60; Ramadan, 1938: 60; Crosnier & Forest, 1973: 256, fig. 83c; Pérez Farfante, 1977: 287, figs. 9, 18B, 20-23.

Previous records.— Off Panama (7°06′N 80°34′W) to Galapagos Islands (00°36′S 86°46′W), Ecuador (Pérez Farfante, 1977). The northernmost distribution limit provided by Pérez Farfante off Costa Rica (1977: 289) is in error; the Panama record of the “Albatross” St. 3353 (Pérez Farfante, 1977: 287) is 1°36′ more to the north.

New record.— One M (CL 9.6 mm), 12 March 2015, Clarion-Clipperton Fault (12°08′40″N 117°14′27″W), trawl, 4001 m depth (ICML-EMU-10984). The northernmost distribution limit is increased by about 5 degrees of latitude, but the new record is located about 2140 km from the previous Panama record, much further away from the coast than all previous records (fig. 1).

Fig. 1.
Fig. 1.

Localities in the eastern Pacific where the four species of decapod crustaceans were collected.

Citation: Crustaceana 89, 5 (2016) ; 10.1163/15685403-00003541

Comments.— Pérez Farfante (1977) reported H. nereus from Panama to Ecuador. This material corresponds to the syntype series used by Faxon (1893) to describe the species. In fact, none of the authors posterior to Faxon (1893, 1895) has documented additional material and, to our knowledge, the present record is the first available since the syntypes were collected by the “Albatross” in 1891.

Caridea Family Pandalidae Heterocarpus hostilis Faxon, 1893 (fig. 2)

Heterocarpus hostilis Faxon, 1893: 204; 1895: 151, pl. XLI, fig. 1-1d; del Solar, 1972: 9 (list); 1987: 79 (list); Méndez, 1981: 102, pl. XLII, figs. 304-397; Wicksten, 1989: 313; Wicksten & Hendrickx, 1992: 9 (list); 2003: 69 (list); Hendrickx, 1995a: 472, fig. 4 (key), 476, textfig.; Kameya et al., 1998: 92; De Grave & Fransen, 2011: 442 (list); Moscoso, 2012: 57 (list).

Previous records.— Gulf of Panama (northern limit, 7°30′N) to Supe, Peru; Isla del Coco, Costa Rica.

Fig. 2.
Fig. 2.

Heterocarpus hostilis Faxon, 1893, F, CL 22.3 mm (ICML-EMU-11037), lateral view. This figure is published in colour in the online edition of this journal, which can be accessed via http://booksandjournals.brillonline.com/content/journals/15685403.

Citation: Crustaceana 89, 5 (2016) ; 10.1163/15685403-00003541

New records.— TALUD XII. St. 23 (18°33′43″N 103°57′45″W), 1 April 2008, 1 M (CL 20.9 mm) and 2 F (CL 20.7-22.3 mm), benthic sledge, 1058-1088 m (ICML-EMU-11037); St. 27 (18°40′28″N 104°35′51″W), 2 April 2008, 2 F (CL 13.7-15.7 mm), benthic sledge, 1040-1095 m (ICML-EMU-10088). TALUD XV, St. 5C (23°16′42″N 110°54′55″W), 5 August 2012, 1 M (CL 22.7 mm), 890-1036 m (ICML-EMU-11038).

These are the first records for the Pacific coast of Mexico (fig. 1). The northernmost distribution limit is increased by nearly 16 degrees of latitude (about 1850 km).

Comments.— Heterocarpus hostilis possesses several morphological characters that make it distinct from the other species of the genus in the region, including: a body much more slender compared to that of H. affinis Faxon, 1893, H. vicarius Faxon, 1893 and H. reedi Bahamonde, 1955; a single postorbital tooth on the dorsal margin of the carapace (vs. 2-5 in the other species); a rostrum longer than the carapace length (shorter in H. affinis and H. vicarius); and 2 pairs of mobile spines on the tip of the telson (vs. 3 in H. affinis and H. vicarius).

Ecology.— Specimens were collected in the following environmental conditions: dissolved oxygen, 0.22-0.26 ml O2/l; T, 4.3-4.7°C; C org: 1.21-1.96%; salinity, 34.53-34.56; sediments, 60% sand, 34% silt, 6% clay.

Family Barbouriidae Parhippolyte cavernicola Wicksten, 1996

Parhippolyte cavernicola Wicksten, 1996: 201, figs. 1-4; Wicksten & Hendrickx, 2003: 68 (list); De Grave & Fransen, 2011: 413 (list).

Previous record.— Known only from the type locality, San Diego Reef, north of San José Island (25°20′N 110°40′W), Gulf of California, Mexico.

New record.— “Shrimp cave” 0.5 km inland but within 15 m of lagoon connected to sea, Cabo Rosa, 20 km west of Puerto Villamil, Isla Isabel (1°1.7′N 91°10.8′W), Galapagos, Ecuador, 17 May 1987 (ICML-EMU-10981) (fig. 1). The known distribution of this species is extended by about 3500 km to the south (approx. 26 degrees of latitude).

Brachyura Family Homolidae De Haan, 1839 Moloha faxoni (Schmitt, 1921)

Homola faxoni Schmitt, 1921: 184, pl. 31, fig. 7.

Paromola faxoni.— Rathbun, 1937: 68, pls. 18-19, fig. 1; Crane, 1937: 107; Griffin, 1965: 86 (key); Luke, 1977: 32; Guinot & Richer de Forges, 1981: 536; Wicksten, 1983: 187, fig. 1b; 1985: 476; 1986: 364; Kuck & Martin, 1994: 177, figs. 1-4.

Moloha faxoni.— Guinot & Richer de Forges, 1995: 383, fig. 33 c-d, g-h; Hendrickx, 1995b: 127 (list); 1997: 33, fig. 41; Wicksten, 2012: 202, fig. 47A; Ng et al., 2008: 41 (list).

Paraloma faxoni.— Hendrickx, 1993: 311 (list) (by error).

Previous record.— From Tajiguas (34°24′07″N 120°00′37″W), California, U.S.A., to Cedros Islands (28°05′48″N 115°31′18″W), western Baja California (Kuck & Martin, 1994; Hendrickx, 1995b). A doubtful record for San José Island, Gulf of California, Mexico (Hendrickx, 1997; see remarks).

New records.— TALUD XIV, St. 7 (28°15′27″N 112°39′36″W), 1 F (CW 24.5 mm), 7 April 2011, Agassiz dredge, 270-309 m (ICML-EMU-10980); St. 30 (28°32′57″N112°59′26″W), 11 April 2011, 1 F (CW 18.2 mm), benthic sledge, 203-204 m) (ICML-EMU-10979).

Present records are the first confirmed captures of M. faxoni within the Gulf of California (see remarks) (fig. 1). This species presents a disjunct distribution pattern along both sides of the Baja California Peninsula.

Ecology.— Reported in depth of 70-460 m (Kuck & Martin, 1994). Material reported herein is from 203 to 309 m depth. Specimens were collected in the following environmental conditions: dissolved oxygen, 2.48-2.90 ml O2/l; T, 12.7°C; C org, 2.21-2.77%; salinity, 34.99-35.00%.

Remarks.— Correa-Sandoval (1991) reported M. faxoni from a locality in the southern Gulf of California (i.e., “isla San José, México”). According to Hendrickx (1997), however, there are no records for this species within the Gulf of California. The locality “San José” is probably a misinterpretation of the sample reported for the “West of San José Point”, on the west coast of the Baja California Peninsula (Crane, 1937).

The most complete study of material of M. faxoni is found in Kuck & Martin (1994) who redescribed the male and provided further information on juveniles, colour and ecology, and a synthesis of the biology and behaviour of this species.

ACKNOWLEDGEMENTS

Ship time aboard the R/V “El Puma” was provided by the Coordinación de la Investigación Científica, UNAM (TALUD XII, XIV and XV), and partly supported by CONACyT (project 179467 for the TALUD XV cruise), Mexico. The TALUD project has also received laboratory support from CONACyT (Project 179467 for the TALUD XV). Study of the decapod crustaceans of the TALUD XII and XIV was supported by PAPPIT project IN-203013-2, UNAM. The specimen of Parhippolyte cavernicola was collected by Thomas Iliffe, Texas A&M University at Galveston, and the specimen of Hymenopenaeus nereus was collected during the ABYSSLINE project by Clifton Nunnally, University of Hawaii at Manoa. The authors thank all scientists, students and crew members who took an active part in the TALUD cruises, Mercedes Cordero for editing the manuscript and preparing fig. 1, and José Salgado-Barragán for preparing fig. 2.

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