HO 6 C MIT (MELAMPIDAE: PULMONATA: GASTROPODA) VUNG Cij^AS6NG H6NG
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33(2): 19-29 Tap chf SINH HOC 6-2011 HO 6c MIT (MELAMPIDAE: PULMONATA: GASTROPODA) VUNG ciJ^A S6NG H6NG HOANG NGQC KHAC Trudng dgi hgc Tdi nguyen vd Moi IrUdng Hd Npi D6 VAN NinroNG Trudng Dgi hgc Suphgm Hd Ndi \\6 THANH HAI \ ien Sinh thai vd Tdi Nguyen Sinh Vdt Hg Melampidae (6c mit), ten khdc Id trong dd cd 2 loai chua xdc dinh dugc ten loai. EUobidae, phd bie'n d cdc vflng ven biln. Day la Nghien cflu vl thdnh phin lodi dc d rflng ngap hg gdm nhilu lodi cd ddi sd'ng gdn vdi rflng man ven biln phfa Bdc Viet Nam cua Dd Van ngap man va la hg duy nha't sd'ng nfla d can va Nhugng va cs. (2008) [9], tap trung d rflng ngap nudc lg, man. Cdc lodi trong hg ndy khdng cd man Qudng Ninh da xac dinh dugc 4 loai: nap mieng, vd rdt ddy. Sd'ng chu ylu d tham Cassidula nucleus, Ellobium aurisjudae, muc, gd'c cay ven bd va cay ngap man. Cflng vi E. chinensis va Pythia scarabaeus. mdi trudng sd'ng vd dac dilm sinh thdi cua hg Tfl nam 2005 din nay, chung tdi cd nhilu nay trung gian gifla cdc hg dc d can vd cdc hg dc dgt thu mdu va nghien cflu vl ddng vat ddy dgc d nudc, do vay, trong nhilu cdng trinh nghien sdng vd ven cfla sdng Hdng. Bai nay trinh bay cflu d Viet Nam thudng ft chu y tdi nhdm ndy. vl thanh phin loai vd dac dilm cua cac loai Khi nghien cflu vl thdnh phdn lodi than trong hg Melampidae vung cfla sdng Hdng. mim d cdc vflng ven biln, nhilu tdc gid da dl cap vl thdnh phdn lodi dc thudc hg Melampidae I. PHUONG PHAP NGHlfiN CtTU d he sinh thai riing ngap man. Qua kilm tra va Mdu dugc thu d trong va ngoai riing ngap phan tfch lai cdc mdu thu dugc luu trfl d cac man vung bai trilu ven cfla sdng Hdng. Cac mdu phdng till nghiem, cac bao tdng cua mdt sd dugc luu trfl tai bd mdn Ddng vat hgc, khoa Sinh trudng dai hgc, cdc vien va trung tam nghien hgc, trudng dai hgc Su pham Ha Ndi. Khi phan cflu tai Viet Nam, nam 2003 Jorgen HyUeberg tfch mdu cd sfl dung tu Ueu cua cac tdc gia da (phdng Sinii thdi hgc biln, Dai hgc Arthus, Vien nghien cflu trudc: Pham Dinh Trgng, 1996; Khoa hgc Sinh hgc, Dan Mach) vd Richard N. Jorgen HyUeberg, 2003.... Kilbum (bao tdng Natal, Nam Phi) da tdng kl't dugc 11 lodi tiiudc 5 gidng trong hg Dinh loai mdu dua vao tai Ueu: Brandt, Melampidae [7]. 1974;'Deepak Apte, 1998; Capenter Kent, 1998. Tdt ca mdu vat va anh chup do chinh tac gia Nghien cuu vl Chdn bung d vflng ven biln thuc hien, ten tilng viet cua cac loai cflng do tdc miln Bdc Viet Nam, Pham' Dinh Trgng (1996) gia dat vi nhdm nay chi cd ten chung la d'c mit. [12] dd xdc dmh dugc 1 lodi El labium chinensis (Pfeffer); Hodng Nggc Khdc, Doan Van Long IL K^T QUA NGHlfeN CtJtJ (2004) khi khdo sdt vl thanh phdn lodi vd phan bd cua ddng vat day d rflng ngdp man Giao 1. Thanh phan loai oc ho Melampidae Thuy, Nam Dinh [8], da thu thap va xac dinh Qua cdc ngudn tu Ueu, phan tfch cdc mdu dugc 5 lodi dc mit (Melampidae) la: Cassidula vat thu dugc, da xdc dinh cd 15 lodi d'c mit nucleus, Pythia scarabaeus, Ellobium thuge 7 gidng d vflng ven cfla sdng Hdng, dugc aurisjudae, Ellobium sp.l, vd Ellobium sp.2. thl hien qua bang sau: 19 Bdng Thanh phdn loai Melampidae or vilng ven cura song Hong STT Tin loai Moi trirdmg song 1 Melampus fascialus (Dcshaycs. 1830) Khu vuc cao ven rflng ngdp mdn 2 Melampus parvuliis PfcilTcr. 1856 Khu vuc cao ven rflng ngdp man 3 Melampus graminca Meirrison, 1946 I^i cao ven rflng ngap man 4 Ijaemodonta octanfracta (Jonas, 1845) Mai biin Idy ven rflng ngap man Ven be't cao, neri cd nhilu mfln gin riing Ijaemodonta cxaraloides Kawabc, 1992 5 ngap man iMcmodonta pumia(os(riata (II & A. Adams, Ven ber cao, neii cd nhilu miln gin rdng 6 1853) ngap man Bdm vde) gdc cdy ven rflng ngdp man, 7 Ellobium aurisjudge (Linnaeus 1758) neti cd nin ddy caei. Bdm a gd'c cdy ngap man, nai cd nin Ellobium chinensis (PreilTer, 1856) 8 diy cao 9 Cassidula aurisfelis (Bruguicrc, 1792 Bam a gdc cay ven rflng ngap man 10 Cassidula mustelina (Dcshaycs, 1830) Bam d gdc cay ven rflng ngap man 11 Cassidula sowerbyana (Pfcilfer, 1853) Mai bfln liy ven rflng ngap man 12 Cassidula sp. I Mat bdn liy ven rflng ngap man 13 Pythia scarabaeus Luinacus, 1758 Gd'c cay ngap man, neti cd nin ddy cao 14 Auriculastra subula (Quoy & Gaimard, 1832) Mat biin ven rflng ngap man 15 Cylindrotis quadrasi Moellendorff, 1895 Mat biin ven rflng ngap man Qua bang tren, cd thl thd'y, so vdi cac vflng {Melampus fascial us, Melampus parvulus, khac [5-12], sd' lugng lodi trong hg d'c mft d Melampus graminea, Laemodonta octanfracta, vflng ven cfla sdng Hdng rdt phong phu. Dilu Laemodonta exaratoides, Laemodonta nay cd le do dilu kien mdi trudng cd nhilu punctatostriata. Cassidula mustelina. Cassidula thuan lgi cho nhdm nay nhu: cd rflng ngap man, sowerhyana. Cassidula sp.l, Auriculastra cd bd cao, bdi bdi gdn cfla sdng cd nhilu miin, subula. Cylindrotis quadrasi), trong dd 1 loai nudc lg.... chua xac dinh dugc ten khoa hgc {Cassidula Trong thdnh phdn lodi, sd lodi nhilu nhdi sp. 1). Mac dfl phong phu vc ihdnh phdn loai nhu thudc gidng Cassidula (4 loai), gid'ng Melampus vay nhung vdn chua gap 1 loai cd kfch thudc ldn vd Laemodonta cd 3 lodi, gid'ng Ellobiutn 2 loai Ellobium aitrismidae (Lirmaeus, 1758). vd gidng Pythia chi cd 1 lodi. Trong sd ndy cd 9 VI phan bd, hdu he'l cdc lodi trong ho lodi mdi bd sung cho khu he ddng vat ddy trong Melampidae diu phdn bd' d vflng trilu cao va khu vuc nghien cflu va ven biln Viet Nam tren trilu. Khoa dinh loai de'n giong va loai trong ho Melampidae vung cura song Hong 1 (16). Mdi ngodi mieng vd cd cdc nip gdp hoac cd rang 2 (3). Vd dep theo hudmg lung bung Pythia scarabaeus 3 (2). Vd khdng dep 4 (15). Vd day, rgng vdi ldp sflng mdu den 5 (10). Mat vd nhdn hoac cd dudng xodn ylu; mieng vd cd cdc ne'p gdp Melampm 6 (7). Thdp d'c cao, vd mdnh, phin gd'c cd cdc dudng xodn nhd Melampus graminea 1 (6). Thdp dc thdp, vd hai cd dang hinh cdn ngugc, vflng Id rd'n nhdn. 8 (9). Mdi trong cd 2 md'u rang Melampus parvulus 20 9 (8). Mdi trong cd 3 mdu rang Melampus fasciatus 10 (5). Mat vd cd dudng xodn cao, mieng vd cd rang Laemodonta 11 (14). Cd nhilu dudng chdm ldm xoan 12 (13). Cd 2-3 ranh xoan phu, dinh vd nhgn, ddng mau, cdc chd'm ldm nhd, ^^^o fMemodonta punctatostriata 13 (12). Khdng rd ranh xodn phu, dinh vd cao, thdp d'c hinh chdp hep, cic chdm ldm ldn, dc ldn hom..... iMetnodonta exaratoides 14 (11). Khdng cd nhilu dudng chdm ldm, chi cd cac ranh xodn va cac dudng xodn thd, vdnh mieng uen tuc Uln vdi ldp sfl bd tru tao tiianh bd Laetnodonta octanfracta 15 (4). Vd nhd va mdng, hinh tru, khdng cd ldp sflng den Cylitidrotis quadrasi 16 (1). Mdi ngoai mieng vd rtiidn 17 (26). Vd ngdn hom 35 mm 18 (25). Vd rdng, cd dang nem, dudng kinh 9 mm hoac ldn hom Cassidula 19 (22). Tru d'c cd nip gdp tao thanh 2-4 mdu rang 20 (21). Vd ldn hem 19 mm Cassidula aurisfelis 21 (20). Vd nhd ban 15 mm Cassidula sowerbyana 22 (19). Tru d'c cd nip gdp tao thanh 1 mdu rang 23 (24). Vd ldn han 17 mm Cassidula mustelina 24 (23). Vd nhd hom 12 mm Cassidula sp.l 25 (18). Vd hep manh, hinh thoi, dudng kinh 13mm hoac nhd hom Auriculastra subula 26 (17). Vd cao hem 35 mm Ellobium 27 (28). Chilu dM vd gdp gdn 2 lin chilu rdng Ellobium chinensis 28 (27). Chilu ddi vd gdp hem 2 ldn chilu rdng Ellobium aurisjudae 2. Mo ta cac loai trong ho Melampidae or nhdn bdng. Khdng cd Id rdn. khu vuc ven cura song Hong a. Melampus fasciatus (Deshayes, 1830) (h. 1) Synonym: Auricula fasciata Deshayes, G.P 1830; Auricula granosa Hombron et Jacquuiot, 1851. Ten ti6ig Viet: dc hat cam. Md td: dc c9 nhd bang hat cam, hirtii trflng, chilu ddi vd khodng 10,0 - 13,0 mm. Vd ddy vfla iJiung chdc, cd 5-6 vdng xodn, cac vdng 1cm xodn gin phang, ranh xoan rdt ndng, dinh vd cd nflm nhgn. Vdng xodn cud'i ldn, chiirn 5/6 chilu Hinh 1. Melampus fasciatus (Deshayes, 1830) cao vd. Tren vdng xodn cudi cd cdc dudng sinh trudmg thd, cd 2-3 ddi mdu ndu dd dgc theo vdng Mdu vat nghien cflu: 5 mdu, thu d khu vuc xodn. Mieng vd hep, ddi, hoi cong, mdi ngodi cd cao ven rflng ngap man cdn Lu, cdn Ngan, cfla 3 rang d mep trong, mdi trong cd 2 rang va 1 sdng Hdng.