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1、精品论文Cleantioides longicornis, a new species of Holognathidae (Crustacea, Isopoda, Valvifera) in the Yangtze Estuary, ChinaWenliang Liu 1,3, Poore Gary C. B. 2, Jianjian Lu 11State Key Laboratory of Estuarine and Coastal Research, East China Normal University, Shanghai 200062, China2Museum Victoria,
2、GPO Box 666, Melbourne, Vic. 3000, Australia3Institute of Oceanology, CAS, the Marine Biological Science Museum, Qingdao 266071, ChinaAbstractCleantioides longicornis, a new species, is described on the basis of specimenscollected from Yangtze estuary, Shanghai, China. The new species can be disting
3、uished from the closely related species, C. albaniensis Poore & Lew Ton, by the narrower antenna 2; a slightly notched pleotelson; arrangements of spines or pectinate spines on preopods.Key words: Isopoda, Holognathidae, Cleantioides, taxonomy, ChinaIntroductionThe valviferan isopod family Holognath
4、idae is characterised by a semicylindricalbody of even width throughout, parallel-sided pleotelson more or less apically rounded, and a short pereopod 4 bearing numerous robust setae. Plesiomorphic features: four pleonites separated laterally, the greatest number of any valviferan; penes separate fr
5、om the base; two uropodal rami (in two of the four genera); and a5-articled five maxillipedal palp with articles 2 and 3 not articulating (Poore & LewTon, 1990).Cleantioides Kensley & Kaufman, 1978 is diagnosed by: the absence of the uropodal exopod (one ramus only); and antennae 1 and 2 flagella cl
6、avate, a minute article much smaller than peduncle article 3 in antenna 1 features that distinguish it from Cleantis Dana, 1849 in particular (Poore & Lew Ton, 1990). Twelve species are known, from the eastern and northern Pacific, Caribbean and central eastern Atlantic, and South Africa (Table 1).T
7、able 1. Species of Cleantioides with relevant literatureC. albaniensis Poore & Lew Ton, 1990 - southern Australia.C. bruscai (Kensley, 1987) - Belize (Kensley & Schotte, 1989).C. emarginata Kwon & Kim, 1992 - Korea.C. japonica (Richardson, 1912) - Japan; Korea (Kwon, 1986; Nierstrasz, 1941).C. natal
8、ensis (Barnard, 1925) - South Africa (Barnard, 1936, 1955; Kensley & Kaufman, 1978).C. occidentalis (Richardson, 1899) - western North America (Richardson, 1905 (Brusca & Iverson, 1985; Brusca & Wallerstein, 1979a, 1979b; Kensley, 1978; Richardson, 1905; Schultz, 1969).C. planicauda (Benedict, 1899)
9、 Florida (type locality); Sea of Japan; southern Mexico to Georgia; Caribbean; south-eastern Brazil (Richardson, 1905 (Brusca & Iverson, 1985; Brusca & Wallerstein, 1979b; Clark & Robertson, 1982; Richardson,1905; Schultz, 1969).C. poorei Kwon & Kim, 1992 - Korea.C. rotundata (Kussakin, 1982) - west
10、ern North Pacific; Japan.C. striata Poore & Lew Ton, 1990 - eastern Australia.2C. verecundus Kensley & Clark, 1998 - Florida, USA.C. vonprahli Ramos & Rios, 1988 - Columbia.In this paper we describe and illustrute a new species from the Yangtze River, southern China. The new species was discovered i
11、n the course of a survey of the Yangtze River. The relationship between the new species and the closely related species, Cleantioides albaniensis is discussed.The known species of Cleantioides differ scarcely at all in details of mouthparts and pleopods. Poore & Lew Ton (1990) described and illustra
12、ted two Australian species in detail. For the new species, these features are figured but not described in many words.Material and methodsSpecimens were collected by Agassiz trawl and then preserved in 75% alcohol.The drawings were made with the aid of drawing tube mounted on a Zezss StemiSv11 compo
13、und microscope.The following abbreviations are used throughout the text: TL, total length of body; SRCWRC, the Specimen Room of Chongxi Wetland Research Center; NMV, Museum of Victoria.Type specimens are deposited in the collections of the Chongxi WetlandResearch Center Specimen Room in Shanghai.Sys
14、tematicsSuborder Valvifera Sars, 1882Family Holognathidae Thomson, 1904Genus Cleantioides Kensley & Kaufman, 1978Cleantioides longicornis sp. nov.Material examinedHolotype, Ar-Cr-027 (SRCWRC), 1 female (TL, 21.6 mm), Yangtze estuary(12158.57E, 3123.11N), 5 m depth, bottom soft mud, 7 April 2006, col
15、l. ZhangFeijun and Liu Wenliang.Paratypes: Ar-Cr-027 (SRCWRC), 2 males, (TL, 14.9, 15.1 mm), estuary ofYangtze River (1221.58E, 3142.38N), 7 m depth, bottom sand, 30 September 2006, coll. Zhang Heng and Liu Wenliang；Ar-Cr-027 (Museum Victoria)，1 female, (TL, 16 mm), Ar-Cr-027 (Museum Victoria)，1 mal
16、e, (TL, 14 mm), estuary of Yangtze River(12226.67E, 3149.58N), 6 m depth, bottom soft mud,29 September 2006, coll. Zhang Heng and Liu Wenliang.DiagnosisHead with a deep longitudinal groove running from the anterior margin, with atransverse groove posteriorly; eyes present. Pereonite 1 little longer
17、than pereonite 2. Antenna 2 long and narrow, about 5 times as long as antenna 1.Merus of pereopods1and 2 with 1 spine and some pectinate spines on anterodistal angle. Dactylus of pereopod 4 reduced to unguis alone, with mesiodistal spines on ischium, merus and carpus.Pereopod 5 dactylus hooked. Pere
18、opod 7 with rows of pectinate spines on posterior margin of merus and propodus.精品论文DescriptionAdult female. Body almost 5 times as long as wide, with even brown pigmentdorsally and on uropods. Dorsal surface largely smooth, without setae. Head 1.6 times as wide as long, anterior margin sinuous, exca
19、vate at midpoint; posterior margin convex; dorsally with a longitudinal groove in middle of anterior margin and transverse groove at back of head. Pereonite 1 longer than rest, pereonites 5-7 progressively shorter.Pleotelson 0.4 whole length; pleonite 1 free and articulating, pleonites 2 and 3 well
20、defined but not articulating, pleonite 4 incised laterally; pleotelson parallel-sided and with semicircular apex, dorsum of distal half with well-defined oblique oval plane.Antenna 1 reaching to middle of second article of antenna 2 peduncle; peduncle article 22.2 times as long as wide; flagellum su
21、bequal to 0.5 length of last article of peduncle, with 6 short apical aesthetascs.Antenna 2 about 0.3 length of body, long and narrow, 8 times as long as wide;flagellum of 1 article, with fine setae outer margin and a dense clump at apex.Mandibles asymmetrical; molar process bearing anterior spines,
22、 fine setae and a ridged triturating surface; spine row of 5 dentate spines; lacinia moblis a toothed blade (left) or a 3-spined tooth (right); incisor 4-toothed, broader and squarer on left.Maxilla I inner plate with 4 complex setae; outer plate with 11 apical spines, some toothed.Maxilla 2 inner p
23、late with oblique row of 11 plumose setae on inner margin plus about 8 simple apical setae; middle and lateral plates with oblique rows of 8 setae.Maxillipedal endite with row of 3 plumose setae mesially; some setae laterally at base of palp; palp twice long as endite; articles 2-5 medially setose,
24、3 and 4 with fine lateral setae; article 3 mediodistally lobed; article 5 wider than long, 0.2 length of article 4; epipod apically truncate.Pereopods 1-3 increasing in length; pereopod 4 0.4 length of pereopod 3;pereopods 4-7 increasing in length.Pereopod 1 with 1 posterodital spine on ischium; 1 l
25、ong spine and 3 pectinate spines (2 long，1 short) on anterodistal angle ofmerus; some posterior spines onmerus, carpus and propodus; propodus with 2 setae on anterodistal angle.Pereopods 2 and 3 similar. Pereopods 2 with 1 anterodital spine on ischium; merus with 1 spine and 5 pectinate spines on an
26、terodistal angle, 3 spines on middle posterior margin; 2 rows of spines on posterior margin of carpus; propodus with 2 setae on anterodistal angle, 6 rows of spines on posterior margin.Pereopod 4 ischium with 4 mesiodistal spines; merus, carpus and propodus with posterodistal U-shaped rows of 8, 18
27、and 12 spines respectively; merus with 34 mesiodistal pectinate spines and 1 anterodistal pectinate spine; carpus with 4 mesiodistal pectinate spines, propodus with 1 anterodistal spine; dactylus reduced to a compact unguis only.Pereopod 5 longer than 4, ischiun with 1 anterodistal spine, some fine
28、setae on anterior margin; merus with 1 anterodistal spine, 3 spines on posterior margin; carpus and propodus with 3 spines on posterior margins and setea on anterior margins; dactylus hooked.Pereopods 6 and 7 similar, more elongate than 5. Pereopod 7 ischium with 4 pectinate spines on anteriodistal
29、angle and 2 pectinate spines on mesial face; with 5 and 6 rows of pectinate spines on mesial face and posterior margin of merus and propodus respectively; propodus with 2 anteriodistalpectinate spines8精品论文Oostegites on pereopods 1-5, first much smaller than rest.Pleopod 1 endopod with about 45 plumo
30、se setae around all of margin, distal ones little shorter than ramus; exopod with about 80 plumose setae laterally and distomesially.Pleopod 2 with similar arrangement of setae; peduncle with short proximally directed lateral lobe.Pleopod 3 peduncle with mesial setae carried on a digitate lobe; endo
31、pod with distal seta; exopod with 30 distolateral plumose setae. Pleopods 4 and 5 rami with short marginal setae laterally. Uropodal endopod with inner angle square, distolaterally rounded, apically truncate; exopod absent.FIGURE 1. Cleantioides longicornis sp. nov., female holotype: a. habitus in d
32、orsal views; b. antenna 1 (dorsal); c. antenna 2 (dorsal); d. mouth (ventral); e. penis (ventral); f. uropodal ramus (mesial)FIGURE 2. Cleantioides longicornis sp. nov., female holotype: g. mandible (mesial);h. MX1 (mesial); i. MX2 (mesial); j. maxilliped (posterior)FIGURE 3. Cleantioides longicorni
33、s sp. nov., k. pereopod 1 and inner face of merus;l. pereopod 2 and inner face of merus; m, n, o. pereopods 4, 5, 7; p, q, r, s, t. pleopods1, 2, 3, 4, 5.Juvenile male. Differs from female in: antenna 2，flagellum of 1 article, with fine setae all over, but thin. pereopods 1-3 and 5-7 with less of fi
34、ne setae dorsally on ischium, merus, carpus and propodus; without an appendix masculina because of not fully adult; penes attached at the anterior margin of pleonite 1 and separated by a sharp sternal ridge.RemarksCleantioides longicornis is similar to the southern Australia C. albaniensis Poore& Le
35、w Ton, 1990. But the new species differs from the latter in: 1. the antenna 2 is long and narrower (8 times as long as wide, versus 4 times); 2. the distal end of pleotelson is slightly notched (versus with a truncate pleotelson); 3. propodus of pereopod 1 withoutpectinate spine on mesial face (vers
36、us with 10 pectinate spines);4. pereopod 2 with 2 rows of spines on posterior margin of carpus and propodus with6 rows of spines on posterior margin (versus with 3 posterior spines on carpus, 2 on propodus); 5. pereopod 4 merus with 34 mesiodistal pectinate spines, carpus with 4 mesiodistal pectinat
37、e spines (versus without mesiodistal pectinate spines).EtymologyThe species name is based on the shape of the antenna 2.DistributionPresently only known from the type locality.AcknowledgementThe work was supported by the National Basic Research Program of China(2002CB412406) and the Pilot Program of
38、 Shanghai Technology and ScienceCommittee (04DZ12049).ReferencesBarnard, K. H. (1925) Contributions to the crustacean fauna of South Africa. No. 9.Further additions to the list of Isopoda. Annals of the South African Museum,20, 381-410.Barnard, K. H. (1936) Isopods collected by the R.I.M.S. Investig
39、ator. Records of theIndian Museum, 38, 147-191.Barnard, K. H. (1955) Additions to the fauna-list of South African Crustacea andPycnogonida. Annals of the South African Museum, 43, 1-107.Benedict, J. E. (1899) Cleantis planicauda Benedict, new species. Footnote, p. 851 in Richardson, 1899, cited belo
40、w.Brusca, R. C. & Iverson, E. W. (1985) A guide to the marine isopod Crustacea ofPacific Costa Rica. Revista de Biologia Tropical (Universidad de Costa Rica),33, 1-77.Brusca, R. C. & Wallerstein, B. R. (1979a) The marine isopod crustaceans of the Gulf of California II. Idoteidae: new genus and speci
41、es, range extensions, and comments on evolution and taxonomy within the family. Proceedings of the Biological Society of Washington, 92, 253-271.Brusca, R. C. & Wallerstein, B. R. (1979b) Zoogeographic patterns of idoteid isopods in the northeast Pacific, with a review of shallow water zoogeography
42、of the area. Bulletin of the Biological Society of Washington, 3, 67-105.Clark, S. T. & Robertson, P. B. (1982) Shallow water marine isopods of Texas.Contributions in Marine Science, University of Texas, 25, 45-59.Dana,J.D.(1849)Conspectuscrustaceorumquaeinorbisterrarum circumnavigatione, Carolo Wil
43、kes e classe Reipublicae, Foederate Duce, lexit et descripsit (continued.). American Journal of Sciences and Arts, 8, 424-428.Kensley, B. (1978) The South African Museums Meiring Naude cruises. Part 7.Marine Isopoda. Annals of the South African Museum, 74, 125-157.Kensley, B. (1987) Further records
44、of marine isopod crustaceans from the Caribbean.Proceedings of the Biological Society of Washington, 100, 559-577.Kensley, B. & Clark, K. (1998) A new isopod species from Key Largo, Florida (Crustacea: Isopoda: Holognathidae). Proceedings of the Biological Society of Washington, 111, 314-319.Kensley
45、, B. & Kaufman, H. W. (1978) Cleantioides, a new idoteid isopod genus from Baja California and Panama. Proceedings of the Biological Society of Washington, 91, 658-665.Kensley, B. & Schotte, M. (1989) Guide to the marine isopod crustaceans of theCaribbean. Washington, D.C., and London: Smithsonian I
46、nstitution Press. Kussakin, O. G. (1982) Marine and brackish-water Crustacea (Isopoda) of cold andtemperate waters of the Northern Hemisphere. Suborders Anthuridea, Microcereberidea, Valvifera, Tyloidea. Opredeliteli po Faune SSR, Akademiya5auk, SSSR, 131, 1-461.Kwon, D. H. (1986) Some idoteid isopo
47、ds (Crustacea) from Korea. Inje Journal, 2,107-121.Kwon, D. H. & Kim, H. S. (1992) Two new species of the genus Cleantioides (Isopoda:Valvifera:Holognathidae)fromKorea.Korean Journal of Systematic Zoology, Special Issue, 3, 85-92.Nierstrasz, H. F. (1941) Die Isopoden der Siboga-Expedition. IV. Isopoda Genuina.III. Gnathiidea, Anthuridea, Valvifera, Asellota, Phreatocoidea. SibogaExpditie Monographie, 19, 235-308.Poore, G. C. B. & Lew Ton, H. M. (1990) The Holognathidae (Crustacea: Isopoda
