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The Temperate Species of the Genus Munida Leach (Crustacea

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The Temperate Species of the Genus Munida Leach (Crustacea 1' BULLETIN DE L' INSTITUT ROYAL DES SCIENCES NATURELLES DE BELGIQUE, BIOLOGIE, 73: 115-136,2003 BULLETIN VA N HET KONINKLIJK BELGISCH INSTITUUT VOOR NATUURWETENSCHAPPEN, BIOLOGIE, 73: 11 5-136, 2003 The temperate species of the genus Munida Leach (Crustacea, Decapoda, Galatheidae) in the east Pacific, with the description of a new species and additional records for tropical-subtropical species by Michel E. HENDRICKX Abstract Introduction Temperate species of Munida occurring in the East Pacific have not Seventeen species of the galatheid genus Munida are cur­ been referred to very often in literature since their original descrip­ rently known from the east Pacific, inc luding the doubtful tion. Five species have been described for the area: Munida record o f M. microphthalma A. MILNE EDWARDS, 1880. curvipes BENEDICT, I 902, from southern Chile; Munida gregaria Only five of these 17 species have records exclusively in (FAB RICIUS , I 793), from southern Chile and around the Strait of temperate w aters of this geographic region while the other 12 Magellan to the SW Atlantic; Munida montemaris BAH AMONDE & species are distributed in tropical/subtropical w ater of the LOPEZ, I 962, from southern Chile; Munida quadrispina BENEDICT, eastern tropical Pacific, with the exception of 1902, from Sitka, Alaska, to Baja California, Mexico; Munida M. mexicana subrugosa (WHITE, 1847), reported in America from Ancud, Chile BENEDICT, 1902, which has been reported along the west and around the Strait of Magellan to Montevideo, Uruguay. All fi ve coast o f B aja California, Mexico, in the w arm tem perate species are redescribed using the type materi al of M. curvipes, M. Californian Province, and M. hispida BENEDICT, 1902, montemaris and M. quadrispina and specimens of M. gregaria and which is known as far north as M onterey B ay, California M. subrugosa obtained from their distribution ranges or from mu­ (HENDRICKX, 2000). seum coll ections. A new species is described from materi al col­ The 12 tropical/subtropical species referred to here above in­ lected off the coast of California. Additional records for several spe­ clude 10 species described between 1880 and 1902 were cies of Munida occurring mainly in tropical-subtropical waters of treated in details by HENDRICKX (2000), who redescribed the East Pacifi c are also included together with an identification key each species using type m aterial and/or rece ntly collected to all species of Munida currently known for the East Pacific. specimens and added two new species to the east Pacific galatheids fauna . A s in the case of tropical/subtropical spe­ cies, temperate species of Munida have not been referred to very often in literature dealing with the east Pacific crusta­ cean fauna since their orig inal description. The five known Les especes temperees du genre Munida presentes dans Ia region du species are: 1) Munida curvipes BENEDICT, 1902, described Pacifique Est n'ont pas ete citees souvent dans Ia Iitterature depuis from southern C hile and known only from the type locality leur descri ption. Cinq especes ont ete decrites pour cette region: (HAIG, 1955; RETAMAL, 198 1); 2) Munida gregaria Munida curvipes BENE DICT, 1902, de Ia partie sud du Chili; Munida gregaria (FABRICIUS, I 793), au sud du Chili et tout au tour du detroit (FABRICIUS, 1793), a common species within its range, de Magel ian jusqu ' a I' Atlantique SW; Mun ida montemaris BAHA­ known in American waters from southern Chile and around MO NDE & LOPEZ, 1962, au sud du Chili; Munida quadrispina the Strait of M agellan to the SW A tlantic (HAIG, 1955) and BENEDICT, 1902, de Sitka, Alaska, jusqu'en Basse Californie, the m ost frequently cited species; 3) Munida montemaris Mexique; Munida subrugosa (WHITE, 1847), connue en Amerique BAHAMONDE & LOPEZ, 1962, described from an unique de Ancud, Chili et tout autour du detroit de Magellanjusqu'a Mon­ m ale collected off Valparai o, C hile, and not reported since; tevideo, Uruguay. Ces cinq especes sont redecrites grace a Ia revi­ 4) Munida quadrispina BENEDICT, 1902, the o nly temperate sion du materiel type de M. cun,ipes, M. montemaris et M. species reported in the northern portion of the East pacific quadrispina et de specimens de M. gregaria et M. sub rugosa prove­ and w ith a distribution exte nding from B aj a C alifornia, nant de leur zone de di stribution ou de collecti ons de musees. Un M exico, to Sitka, Alaska (WICKSTEN, 1989; C ADIEN, 1997); specimen recolte en face des cotes de Ia Cali fornie pennet de decrire 5) Munida subrugosa (WHITE, 1847), a common species une nouvelle espece du genre. Des nouveaux registres concernant plusieurs especes de Munida se distribuant principalement dans ies within its range, known in A m erican waters from Ancud, eaux tropicales-subtropicaies du Pacifique Est sont presentes ainsi Chile and around the ~ tra it of M agellan to M o ntevideo, Uru­ qu' une clef d' identification de toutes les especes de Munida recon­ guay (H AIG, 1955; RETAMAL, I 981). nues actuell ement pour ie Pacifi que Est. The purpose of this paper is to present the redescription of I I 116 MICHEL E. HENDR IKX temperate species of Munida occurring in the East Pacific Systematic section and that were not included in the previous publication (see HENDRICKX, 2000). During this study, the type materi al of Munida curvipes BENEDICT, 1902 M. cwvipes, M. montemaris and M. quadrispina were exam­ (Fig. 1) ined and are redescribed. Specimens of M. gregaria, M. subrugosa and M. quadrispina obtained from their distribu­ Munida curvipes BENEDICT, 1902:254, fig. 6.- RICHARDSON, 1904: 86 (as ti on areas or available in the holdings of the Los Angeles hos l of Pseudione paucisecw RI CHAR DSON, 1904).- H AIG, 1955: 38.­ RETAMAL, 198 1: :?2.- WJCKSTEN, 1989: 3 15 (li sted) .- HEND RICKX , 2000: County Museum of Natural History, Los Angeles, Califo rnia, 164 (!able 1).- RETAMAL & l ARA, 2002: 206 (listed) . and of the SCRIPPS Institution of Oceanography Inverte­ brates Collections, La Joll a, California, were also examined MATERIAL EXAMINED and used for a complete redescription. In her study dealing with materi al of decapod crustaceans Type, "Albatross" St. 2788, 11 Feb 1888, 1M (CL 13.2 mm) obtained from off British Colombia, HART ( 1982) reported (USNM 20533). The label in the type jar provides the follow­ M. quadrispina as widespread. She indicates that "A careful ing data (see comments): Off Port Otway, Patagonia, "Alba­ study of material at hand will probably reveal undescribed tross" Station 2788, I 050 fathoms (1 890 m) (no date pro­ species". HART (op. cit. ) also reports that large specimens, up vided) (USNM 20533). to 67 mm length and often taken in fjords, are probably an undescribed species. Among the materi al reviewed during DESCRIPTION this study, one large specimen of Munida (originally identi­ fied as M. quadrispina) represents, indeed, an undescribed Carapace with distinct transverse striae, very setose; second­ species and is it probably related to these large Munida previ­ ary stri ae reduced in branchial regions. Cervical groove well ously reported by Hart. This new species is described herein . marked. Pterygostomian fl ap narrow, not inflated. Two pairs Additionally, some previously unpublished records for spe­ of epi gastric spines, the anterior pair the strongest and more cies of Munida treated by HENDR ICKX (2000) and based on closely set than the posteri or pair which are smaller. A small material examined during this study are included in an ap­ parahepatic spine. A pair of small anterobranchial spines, the pendi x. A key to all species of Munida currently known from anteri ormost very small. Frontal margi n transversally ob­ the East Pacific is included at the end of this contribution. lique. Lateral margin (right) sli ghtl y convex. Rostrum of type In the systematic secti on, a restricted synonymy is provided broken, narrow at base. Supraocular spines short, sli ghtly di ­ forM. gregaria and M. subrugosa. For these two species, all verging, overreaching anterior margin of cornea. Anterola­ citations included in HAIG (1955), except for the original de­ teral spines sharp, shorter than supraocul ar spines and not scription, are omitted. For the other species (M. curvipes, M. reaching the level of the sinus between rostrum and montemaris, M. quadrispina) all references known to the au­ supraocul ar spines. Anterior branchial margin armed with 3 thor have been included in the synonymy. Also included fo r long, sharp spines, the anterior slightly longer; posteri or each species are: a li st of material examined, the description, branchial margin armed with 2 slightly curved spines; 6 the type locality, the known di stribution and depth ranges, spines on lateral margins of entire carapace (excluding ante­ and comments on the species taxonomy or distribution. rolateral). Sternal plastron (sternites 3-7) wider than long; Terminology used in the species description has been pro­ third thoracic sternite projected anteriorly; fourth sternite vided in detail s in HENDRICKX (2000) and is therefore not very narrow anteriorly, its length less than 112 its width; sur­ repeated herein . Abbreviations used in this paper are: CL, face of sternite 4-7 punctate; sternites 5 to 7 with transverse carapace length ; CLwr, carapace length without rostrum ; ridges obtuse, strongly granulated. Second abdominal seg­ CW, carapace width; TL, total length; St., sampling station; ment with three pairs of strong, sharp dorsal spines, two lat­ NS, not sexed; NM, not measured; M , male; F, female; FF, eral pairs and one ~e ntr a l , the later stronger. Third and fo urth ovigerous female; Col., collector; Id ., identificator. Acro­ abdominal segments without spines. Eyes small , their cornea nyms offi cially used to designate in stitutional coll ecti ons di ameter about equal to length of supraocul ar spines and less are: EMU-, Estacion Mazatl an UNAM, Mazatl an, Mexico; than 1/3 the distance between the base of anterolateral spines.
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