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Zootaxa 205: 1-19 (2003) ISSN 1175-5326 (Print Edition) ZOOTAXA 205 Copyright © 2003 Magnolia Press ISSN 1175-5334 (Online Edition)

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Zootaxa 205: 1-19 (2003) ISSN 1175-5326 (Print Edition) ZOOTAXA 205 Copyright © 2003 Magnolia Press ISSN 1175-5334 (Online Edition) Zootaxa 205: 1-19 (2003) ISSN 1175-5326 (print edition) www.mapress.com/zootaxa/ ZOOTAXA 205 Copyright © 2003 Magnolia Press ISSN 1175-5334 (online edition) A new species of Moraria (Crustacea: Copepoda: Harpacticoida) from the Laurentian Great Lakes JANET W. REID1 & LYNN T. LESKO2 1 Research Associate, Division of Science and Learning, Virginia Museum of Natural History, Martinsville, Virginia; Correspondence Address: 1100 Cherokee Court, Martinsville, VA 24112-5318, USA; email: [email protected] 2 11123 Boyce Road, Chelsea, MI 48118, USA; email: [email protected] Abstract Moraria hudsoni n. sp. is described from Trails End Bay in Lake Michigan and Prentiss Bay in Lake Huron, Michigan, USA. The new species differs from its congeners in chaetotaxy, body orna- mentation, and other characters. We review published records of members of Moraria from North and Central America; no species is known from South America. Species of this genus have been found in the mountains of southern Mexico, Guatemala, and Honduras, but none of these has been validly described. In North America, eight species have been recorded from Alaska, Canada, and the conterminous USA as far south as North Carolina. We report new geographical records of M. affinis from Virginia, and of both M. cristata and M. virginiana from Maryland and Virginia. We provide a tabular key to aid in identification of the named species of Moraria in North America. Key words: Copepoda, Harpacticoida, Laurentian Great Lakes, taxonomy, new species, Moraria Introduction In collections from the Laurentian Great Lakes made by Patrick L. Hudson and associates of the Great Lakes Science Center at Ann Arbor, Michigan, there appeared a species of the harpacticoid copepod genus Moraria that could not be attributed to any presently known taxon in the genus. We describe the new species and compare it to congeners. The taxonomic literature on this genus is widely scattered and there is no recent revi- sion. We review records of Moraria from North and Central America, and discuss the known geographical distributions and habitats of all the named North American species. To aid readers, references to the original descriptions of the taxa mentioned are provided, although some of these articles are not cited directly in the text. Accepted: 23 May 2003; published: 4 June 2003 1 ZOOTAXA Copepods were fixed and preserved in 70% ethanol. For taxonomic description, indi- 205 vidual specimens were transferred to glycerin and then to lactic acid. Drawings were made from either whole specimens temporarily mounted in lactic acid, or from dissected speci- mens mounted on slides in commercial CMC-10® medium (Masters Chemical Company, Wood Dale, Illinois) to which a little chlorazol black E stain had been added. Specimens were drawn using a Leica DMLB® compound microscope equipped with differential interference contrast illumination, at magnifications of 400, 1000, or 2000x. The photomi- crographs were taken with a SP100® cooled color digital camera mounted on a Zeiss Photo-Microscope III®. The type specimens have been deposited in the collections of the National Museum of Natural History (NMNH), Smithsonian Institution, Washington, D.C. (USNM catalog numbers). Voucher specimens of some other species mentioned have been deposited either in the NMNH or in the Virginia Museum of Natural History, Martinsville, Virginia (VMNH). Description Family Canthocamptidae Brady 1880 Genus Moraria T. and A. Scott 1893 Moraria hudsoni n. sp. Figures 1- 6 Synonymy: Moraria laurentica.-Hudson et al. 1998: 34 [partim]. Moraria mrazeki.-Hudson et al. 1998: 34 [partim]. Material examined: Holotype female, dissected on slide (USNM 1007895); allotype male, dissected on slide (USNM 1007896); and 7 female, 5 male, and 6 copepodid paratypes, ethanol-preserved (USNM 264250); all from Michigan: Mackinac County: Lake Huron: Prentiss Bay north of Highway M134, 45°59'26"N, 084°13'37"W, collected with hand grab, 18 August 1994, coll. P.L. Hudson. Non-paratype specimens: 1 male, Michigan: Lake Michigan: Trails End Bay, 45°44'50"N, 084°48'06"W, among aquatic vegetation, water depth 30-60 cm, 6 June 1994, coll. P.L. Hudson (USNM 259905). 1 female and 1 copepodid, Michigan: Lake Michigan: Trails End Bay, location as above, 15 August 1994, coll. P.L. Hudson (USNM 278064). 2 females, Michigan: Mackinac County: Lake Huron: Prentiss Bay: Whitefish Point, Cedar Camp, 45°58'49"N, 084°13'52"W, 7 June 1996, coll. P.L. Hudson (USNM 284307). 7 females, Michigan: Mackinac County: Lake Huron: Prentiss Bay, north of Highway M134, among Carex, water depth 40-50 cm, 45°59'26"N, 084°13'37"W, 9 May 1996, coll. P.L. Hudson (USNM 284313). 4 females, Michigan: Mackinac Co.: Lake Huron: Prentiss Bay, location as above, sedge meadow, surface grab, 15 May 2000, coll. P.L. Hudson (USNM 305420). 2 © 2003 Magnolia Press REID & LESKO Female: Length of holotype, from tip of rostrum to tips of caudal rami (specimen ZOOTAXA extended in lactic acid), 448 µm; range of lengths of 7 female paratypes (in glycerin), 392- 205 424 µm. Body (Figs. 1, 2, 3A) compact, tapering antero-posteriorly. Except for cephalosome, body with numerous rows of minute hairs; integument covered with refractile points, appearing as tiny pores (arrowed circle in Fig. 2B). Rostrum distinct from cephalosome, bluntly triangular with 2 subapical sensilla. Cephalosome with ovoid dorsal hyaline win- dow; pedigers 2 and 3 each with paired lateral hyaline windows (Fig. 2A). Hyaline frills of pedigers 2-4 smooth; frills of pediger 5, genital double-somite, and abdominal somites 2 and 3 crenate. Genital double-somite with row of spines extending dorsally and laterally along posterior margin; abdominal somites 2 and 3 each with row of spines along entire posterior margin. Urosomite with spines along lateral and ventral margins. FIGURE 1. Moraria hudsoni n. sp., female. A, habitus, dorsal view; B, posterior urosomites and caudal rami, dorsal view. Anal operculum (Figs. 2B, 3C) rounded, reaching approximately to posterior end of urosomite, its free margin bare. Caudal ramus (Figs. 1B, 2, 3A-D) about 2 times longer than wide, tapering posteriorly and with prominent longitudinal dorsal crest extending to 4/5 length of ramus and ending in acute point. Ramus bearing 2 lateral (outer) setae (anterior lateral seta also with tiny hair at its base); 3 terminal setae of which the medial (inner) terminal seta is short and slender, MORARIA HUDSONI N. SP. © 2003 Magnolia Press 3 ZOOTAXA and the middle and lateral terminal setae are stout and spinulose, without interior breaking 205 planes; and 1 dorsal seta. Medial margin of ramus with diagonal row of about 5 spines. FIGURE 2. Moraria hudsoni n. sp., female. A, habitus, lateral view (longest terminal caudal seta shown separately); B, habitus, dorsal view (arrow indicates detail of integumental points, which cover most of the body). Scale bar applies to all figures. 4 © 2003 Magnolia Press REID & LESKO ZOOTAXA 205 FIGURE 3. Moraria hudsoni n. sp., female. A, Abdomen, ventral view; B, caudal ramus, lateral view; C, anal operculum and caudal rami, dorsal view; D, caudal ramus, ventral view; E, antennule; F, antenna; G, antennal exopodite, enlarged; H, mandible; I, maxilla; J, maxilliped. Antennule (Fig. 3E) 7-segmented, set on prominent base; segments 1-7 bearing respectively, 1, 8, 6, 2, 1, 2, and 8 setae, segments 4 and 8 also each bearing aesthetasc. MORARIA HUDSONI N. SP. © 2003 Magnolia Press 5 ZOOTAXA Antenna (Fig. 3F, G) with allobasis; exopodite a single segment bearing 1 large stout 205 spinulose seta on margin and 3 slender smooth setae terminally. Mandible (Fig. 3H), endopodite with 2 apical setae. Maxillule (not illustrated), precoxal arthrite with 7 spines and 2 setae; coxa with apical spine; basis with apical spine and 2 subapical setae. Maxilla (Fig. 3I), syncoxa with 2 endites, each with 2 plumose terminal setae; basis with spatulate spinulose spine and 2 pairs of setae. Maxilliped (Fig. 3J), basis with large plumose distal seta. Legs 1-4 (Fig. 4A-D) with 3-segmented exopodites and 2-segmented endopodites. Couplers (intercoxal sclerites) without ornament. Leg 1, endopodite slightly shorter than exopodite, segment 1 with slender seta on mediodistal corner, segment 2 with 3 terminal and subterminal setae of which middle seta is about 3 times longer than endopodite. Legs 2-4, exopodite segment 3 respectively with 4, 4, and 5 socketed spines and setae; endopodite segment 1 with 1, and segment 2 respectively with 2, 3, and 3 setae. Leg 5 (Fig. 4E), baseoendopodites separated, medial lobe of each leg bearing 6 setae. Exopodite distinct from baseoendopodite, ovoid, reaching about to end of baseoen- dopodite, usually bearing 5 setae, but holotype female with 6th seta on medial margin (arrowed in figure). Preserved specimens colorless. Male: Length of allotype, from tip of rostrum to tips of caudal rami (specimen extended in lactic acid), 420 µm; range of lengths of 5 male paratypes (in glycerin), 360- 400 µm. Body (Fig. 5) like that of female in general shape, number and position of hyaline win- dows, and ornamentation; in particular, spine rows on all urosomites complete dorsally. Anal somite, operculum, and caudal rami as in female. Antennule (Fig. 6A) apparently of 9 segments, segments 4 and 9 each with aesthetasc. Antenna and mouthparts as in female. Legs 1-4, coxopodites, basipodites, exopodites, endopodite of leg 1, and couplers as in female; spine on mediodistal corner of basipodite of leg 1 also similar to that of female. Legs 2-4 endopodites 2-segmented, all dimorphic. Leg 2 endopodite (Fig. 6B, C), segment 1 with 1 spinulose seta on medial margin and 2 stout lateral spines; segment 2 with 2 long slender plumose setae. Leg 3 endopodite (Fig. 6D), segment 1 with 1 spinulose seta and 1 spineonmedialmargin,and2spinesonlateralmargin;segment2withstoutapophysis having simple acute tip, and 2 terminal setae of which the medial seta is longer and spinu- lose.
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