taxonID	type	description	language	source
03D587BE3715FFACC4C4458A61CFFE2F.taxon	description	GENBaNK acc. NO. GENBaNK acc. NO. Macrostomum acus SEq. 1 (ZDK 1) * KY 579351 KY 579342 Macrostomum acus SEq. 2 (ZDK 2) * KY 579352 KY 579343 Macrostomum acus SEq. 3 (ZDK 3) * KY 579353 KY 579344 Macrostomum balticum (MTP LS 144) FJ 715310 FJ 715330 Macrostomum bicaudatum SEq. 1 (YDK 1) * KY 814489 KY 652224 Macrostomum bicaudatum SEq. 2 (YDK 2) * KY 814490 KY 652225 Macrostomum bicaudatum SEq. 3 (YDK 3) * KY 814491 KY 652226 Macrostomum chongqingnese (YL- 2016 CQ 1) KX 769148 KX 769150 Macrostomum clavituba (MTP LS 301) FJ 715304 FJ 715324 Macrostomum dongyuanensis SEq. 1 (DYDK 1) * KY 652215 KY 652218 Macrostomum dongyuanensis SEq. 2 (DYDK 2) * KY 652216 KY 652219 Macrostomum dongyuanensis SEq. 2 (DYDK 3) * KY 652217 KY 652220 Macrostomum finlandense (MTP LS 91) FJ 715302 FJ 715322 Macrostomum gieysztori (MTP LS 264) FJ 715301 FJ 715321 Macrostomum heyuanensis SEq. 1 (HDK 1) * KY 814492 KY 652221 Macrostomum heyuanensis SEq. 2 (HDK 2) * KY 814493 KY 652222 Macrostomum heyuanensis SEq. 3 (HDK 3) * KY 814494 KY 652223 Macrostomum hystricinum (MTP LS 278) FJ 715311 FJ 715331 Macrostomum hystrix (MTP LS 68) FJ 715303 FJ 715323 Macrostomum kepneri (MTP LS 285) FJ 715307 FJ 715327 Macrostomum lankouensis n. sp. SEq. 1 (LDK 1) * KY 814495 KY 814498 Macrostomum lankouensis n. sp. SEq. 2 (LDK 2) * KY 814496 KY 814499 Macrostomum lankouensis n. sp. SEq. 3 (LDK 3) * KY 814497 KY 814500 Macrostomum lignano (MTP LS 244) FJ 715306 FJ 715362 Macrostomum longituba (MTP LS 274) FJ 715309 FJ 715329 Macrostomum mystrophorum (MTP LS 64) FJ 715305 FJ 715325 Macrostomum obtuse SEq. 1 (DDK 1) KY 579348 KY 579339 Macrostomum obtuse SEq. 2 (DDK 2) KY 579349 KY 579340 Macrostomum obtuse SEq. 3 (DDK 3) KY 579350 KY 579341 Macrostomum pusillum (MTP LS 112) FJ 715313 FJ 715333 Macrostomum quiritium (MTP LS 102) FJ 715299 FJ 715319 Macrostomum qiaochengensis KY 008499 KY 008502 Macrostomum rubrocinctum KC 869789 KC 869842 Macrostomum shiyanensis n. sp. SEq 1 (SDK 1) * KY 814504 KY 814501 Macrostomum shiyanensis n. sp. SEq 2 (SDK 2) * KY 814505 KY 814502 Macrostomum shiyanensis n. sp. SEq 3 (SDK 3) * KY 814506 KY 814503 Macrostomum sinensis SEq. 1 (ZGDK 1) * KY 579354 KY 579345 Macrostomum sinensis SEq. 2 (ZGDK 2) * KY 579355 KY 579346 Macrostomum sinensis SEq. 3 (ZGDK 3) * KY 579356 KY 579347 Macrostomum SP. (MTP LS 302) FJ 715332 FJ 715332	en	Lin, Yi-Tao, Feng, Wei-Tao, Xin, Fan, Zhang, Lv, Zhang, Yu, Wang, An-Tai (2017): Two new species and the molecular phylogeny of eight species of Macrostomum (Platyhelminthes: Macrostomorpha) from southern China. Zootaxa 4337 (3): 423-435, DOI: 10.11646/zootaxa.4337.3.7
03D587BE3715FFACC4C4458A61CFFE2F.taxon	materials_examined	...... continued on the next page Material examined. HOlOTYpE: PLA-MA 0040, mOUNTED SpEcImENS. SpEcImENS wErE cOllEcTED bY ZHANg Lv frOm THE SHIYAN RESErvOIr, SHENzHEN, GUANgDONg PrOvINcE, CHINA (2341 ' 03 " N, 113 55 ' 06 " E). PArATYpE: PLA- MA 0041 ~ 0044, mOUNTED SpEcImENS. PArATYpE: PLA-MA 0045, SErIAl SEcTION. All THE TYpE SpEcImENS ArE DEpOSITED IN IZCAS.	en	Lin, Yi-Tao, Feng, Wei-Tao, Xin, Fan, Zhang, Lv, Zhang, Yu, Wang, An-Tai (2017): Two new species and the molecular phylogeny of eight species of Macrostomum (Platyhelminthes: Macrostomorpha) from southern China. Zootaxa 4337 (3): 423-435, DOI: 10.11646/zootaxa.4337.3.7
03D587BE3715FFACC4C4458A61CFFE2F.taxon	etymology	Etymology. THE NAmE Of THIS NEw SpEcIES IS DErIvED frOm THE NAmE Of THE fIrST cOllEcTION SITE. THE AUTHOrS HAvE AlSO cOllEcTED THE SpEcIES IN DONgHU PArk, SHENzHEN (N 22 ° 33 ′ 50 ″, E 114 ° 08 ′ 36 ″) AND HEYUAN, GUANgDONg PrOvINcE (2358 ' 39 " N, 115 2 ' 44 " E).	en	Lin, Yi-Tao, Feng, Wei-Tao, Xin, Fan, Zhang, Lv, Zhang, Yu, Wang, An-Tai (2017): Two new species and the molecular phylogeny of eight species of Macrostomum (Platyhelminthes: Macrostomorpha) from southern China. Zootaxa 4337 (3): 423-435, DOI: 10.11646/zootaxa.4337.3.7
03D587BE3715FFACC4C4458A61CFFE2F.taxon	description	Description. THE flAT bODY IS mIlkY-wHITE IN cOlOr AND rOD-SHApED wHEN mOvINg. THE lENgTH AND wIDTH Of mATUrE INDIvIDUAl ArE 1,560 – 2,290 µm AND 260 – 440 µm (N = 9), rESpEcTIvElY (FIgS. 1 A, 3 A). THE bODY HAS DENSE cIlIA (lENgTH: 3 – 5 µm, N = 3) AND SENSOrY HAIrS (1 – 3 HAIrS AS A bUNDlE, lENgTH: 12 µm, N = 6) ON ITS SUrfAcE. NUmErOUS rHAbDITES cOvEr THE SUrfAcE Of wHOlE bODY. THE DISTANcE bETwEEN THE ANTErIOr rOUNDED END AND THE EYES IS 210 – 260 µm (N = 5). IN gENErAl, THE pAIrED rENIfOrm EYES ArE lOcATED AT 12 % Of THE bODY lENgTH, AND THE DISTANcE bETwEEN THE EYES IS 12 – 30 µm (N = 5) (FIgS. 1 A, 2 A & C, 3 A). THE pHArYNX, 150 – 290 µm (N = 5) lONg, OpENS vENTrAllY pOSTErIOr TO THE EYES. PHArYNgEAl glANDS ArE lOcATED ON EITHEr SIDE Of THE pHArYNX AND EXTEND TO THE ANTErIOr END Of THE INTESTINE (FIgS. 1 B, 2 C, 3 A). THE INTESTINE, 670 – 960 µm (N = 5) IN lENgTH, EXTENDS frOm THE pOSTErIOr END Of pHArYNX TO THE ANTErIOr END Of fEmAlE ATrIUm (FIgS. 1 A, 2 A, 3 A). ADHESIvE glANDS ArE SITUATED AT THE vENTrAl SUrfAcE Of THE lONg-Arc pOSTErIOr END Of bODY. (FIgS. 1 D, 3 F). THE fEmAlE rEprODUcTIvE SYSTEm cONSISTS Of OvArIES, OvIDUcTS, fEmAlE ATrIUm AND fEmAlE gONOpOrE. THE pAIrED OvArIES ArE lOcATED ON EITHEr SIDE Of THE INTESTINE AT 66 % Of bODY lENgTH. ImmATUrE EggS ArE SITUATED IN THE ANTErIOr 50 % Of THE OvArIES, fOllOwED bY mATUrE EggS wITH mOrE pIgmENT. FEmAlE ATrIUm wITH NUmErOUS SpErm frOm OTHEr INDIvIDUAlS IS lOcATED AT THE 75 % Of THE bODY lENgTH, pOSTErIOr TO THE INTESTINE (FIgS. 1 A, 2 A). FEmAlE gONOpOrE IS SUrrOUNDED rADIAllY bY mANY glANDS AND OpENS AT THE vENTrAl SIDE Of THE fEmAlE ATrIUm. (FIgS. 2 B & D, 3 B). THE mAlE rEprODUcTIvE SYSTEm cONSISTS Of pAIrED TESTES, vAS DEfErENS, A fAlSE vESIcUlA SEmINAlIS, A vESIcUlA SEmINAlIS, A vESIcUlA grANUlOrUm, A pENIS STYlET AND THE mAlE gONOpOrE. THE pAIrED rOD-SHApED TESTES ArE lOcATED ON EITHEr SIDE Of THE INTESTINE AT 33 % Of THE bODY lENgTH. IT cONNEcTS pOSTErIOrlY TO THE fAlSE vESIcUlA SEmINAlIS vIA THE vAS DEfErENTIA. THE lONg OvAl-SHApED fAlSE vESIcUlA SEmINAlIS cONNEcTS TO THE vESIcUlA SEmINAlIS AT ITS lEfT SIDE. THE vESIcUlA SEmINAlIS IS AlSO OvAl- SHApED AND cONNEcTS TO THE vESIcUlA grANUlOrUm AT ITS ANTErIOr lEfT SIDE. THE vESIcUlA grANUlOrUm IS pArTIAllY INSErTED INTO THE bASE Of THE pENIS STYlET (FIgS. 1 C, 2 B & E, 3 B – C). PENIS STYlET, 160 – 170 µm (N = 3) IN lENgTH, lOcATED pOSTErIOr TO vESIcUlA grANUlOrUm, AND HAS THrEE bENDS (140 ° AT 50 %, 130 ° AT 65 %, AND 100 ° AT 90 % ANTErIOr pOSITION), AND fOrmS A cOmplEX HOOk-SHApED STrUcTUrE. THE bASE Of pENIS STYlET IS fUNNEl-SHApED AND ITS DIAmETEr IS 29 – 32 µm (N = 3). THE DIAmETEr Of pENIS STYlET grADUAllY DEcrEASES frOm THE bASE TO THE pOSTErIOr 33 % pOSITION, wHIlE THE DIAmETEr Of THE DISTAl OpENINg IS 6 µm (N = 3). THE mAlE gONOpOrE IS lOcATED pOSTErIOr TO THE pENIS STYlET (FIgS. 1 F – G, 3 D). THE lENgTH Of THE mATUrE SpErm IS 80 – 90 µm (N = 3), wITH NO ObvIOUS bOUNDArY bETwEEN fEElEr AND bODY. THE lENgTH Of THE SHAfT IS 30 – 34 µm (N = 3). THE pAIrED brISTlES, 8 – 9 µm IN lENgTH (N = 3), ArE lOcATED AT THE bOUNDArY bETwEEN bODY AND SHAfT. THE pOSTErIOr END Of THE SpErm IS THINNEr THAN THE bODY AND HAS A clUSTEr Of brUSHES, 3.0 – 4.5 µm IN lENgTH (N = 3) (FIgS. 1 E, 3 E). Taxonomic comparison. Macrostomum extraculum AX et al., 1990, AND M. retortum PApI, 1951 ArE mOST SImIlAr TO M. shiyanensis n. sp. IN TErmS Of THE mOrpHOlOgY Of THEIr pENIS STYlET (TAb. 3). IN M. extraculum, THE pENIS STYlET IS 68 – 72 µm IN lENgTH AND AlSO IS SImIlArlY bENT ON DIffErENT DImENSIONS. THE DIAmETEr AT ITS bASE IS 18 – 22 µm AND DEcrEASES grADUAllY frOm THE bASE TO THE pOSTErIOr 50 % pOSITION. THE DISTAl END IS SlIgHTlY SwOllEN, wITH AN OpENINg Of 3 µm. AS fOr M. retortum, THE pENIS STYlET IS 1 27 – 138 µm lONg AND HAS TwO cUrvES. THE pOSTErIOr cUrvE SHOwS AN AcUTE ANglE, wHIlE THE DISTAl END IS SlIgHTlY lIfTED AND THE DIAmETEr Of THE OpENINg IS 3.5 µm. IN cONTrAST, THE pENIS STYlET Of M. shiyanensis n. sp. IS 160 – 170 µm lONg, wHIlE ITS DIAmETEr grADUAllY DEcrEASES frOm THE bASE TO THE pOSTErIOr 33 % pOSITION. THE DISTAl END IS NOT SwOllEN, wHIlE THE DIAmETEr Of THE DISTAl OpENINg IS 6 µm. AccOrDINglY, mOrpHOlOgIcAl cHArAcTErISTIcS Of M. shiyanensis n. sp. ArE DISTINcT frOm THOSE Of THE SImIlAr SpEcIES. THErEfOrE, IT IS EvIDENT THAT M. shiyanensis IS A NEw SpEcIES Of THE gENUS Macrostomum.	en	Lin, Yi-Tao, Feng, Wei-Tao, Xin, Fan, Zhang, Lv, Zhang, Yu, Wang, An-Tai (2017): Two new species and the molecular phylogeny of eight species of Macrostomum (Platyhelminthes: Macrostomorpha) from southern China. Zootaxa 4337 (3): 423-435, DOI: 10.11646/zootaxa.4337.3.7
03D587BE3712FFA2C4C446C56022FCCF.taxon	materials_examined	Material examined. HOlOTYpE: PLA-MA 0030, mOUNTED SpEcImENS. THIS NEw SpEcIES wAS cOllEcTED frOm A cOUNTrY brOOk IN HEYUAN, GUANgDONg PrOvINcE, CHINA (2358 ' 39 " N, 11502 ' 44 " E), bY ZHANg Lv. PArATYpE: PLA- MA 0031 ~ 0032, mOUNTED SpEcImEN. PArATYpE: PLA-MA 0033 ~ 0036, SErIAl SEcTION. PArATYpE: PLA-MA 0037 ~ 0039, mOUNTED pENIS STYlETS. All THE TYpE SpEcImENS ArE DEpOSITED IN THE INSTITUTE Of ZOOlOgY, CHINESE AcADEmY Of ScIENcES (IZCAS), BEIJINg, CHINA.	en	Lin, Yi-Tao, Feng, Wei-Tao, Xin, Fan, Zhang, Lv, Zhang, Yu, Wang, An-Tai (2017): Two new species and the molecular phylogeny of eight species of Macrostomum (Platyhelminthes: Macrostomorpha) from southern China. Zootaxa 4337 (3): 423-435, DOI: 10.11646/zootaxa.4337.3.7
03D587BE3712FFA2C4C446C56022FCCF.taxon	etymology	Etymology. THE NAmE Of THIS NEw SpEcIES IS DErIvED frOm THE NAmE Of THE LANkOU TOwN IN DONgYUAN COUNTY, HEYUAN, GUANgDONg PrOvINcE, CHINA.	en	Lin, Yi-Tao, Feng, Wei-Tao, Xin, Fan, Zhang, Lv, Zhang, Yu, Wang, An-Tai (2017): Two new species and the molecular phylogeny of eight species of Macrostomum (Platyhelminthes: Macrostomorpha) from southern China. Zootaxa 4337 (3): 423-435, DOI: 10.11646/zootaxa.4337.3.7
03D587BE3712FFA2C4C446C56022FCCF.taxon	description	Description. WHEN mOvINg, THE rOD-SHApED bODY IS DOrSOvENTrAllY flATTENED. THE lENgTH AND wIDTH Of THE bODY ArE 1,050 – 1,400 µm AND 200 – 300 µm, rESpEcTIvElY (N = 6) (FIgS. 4 A, 5 A, 6 A). THE bODY HAS DENSE cIlIA (2 – 4 µm IN lENgTH, N = 3) AND SENSOrY HAIrS (1 – 3 HAIr pEr bUNDlE, 8 – 10 µm IN lENgTH, N = 5) ON ITS SUrfAcE. NUmErOUS rHAbDITES cOvEr THE SUrfAcE Of THE wHOlE bODY. THE DISTANcE bETwEEN THE rOUNDED ANTErIOr END Of bODY AND THE pAIrED blAck rENIfOrm EYES ArE 140 – 180 µm (N = 6), AND THE DISTANcE bETwEEN EYES IS 10 – 20 µm (N = 6). THE pHArYNX IS 110 – 150 µm IN lENgTH (N = 6), AND pHArYNgEAl glANDS ArE lOcATED ON EITHEr SIDE Of IT (FIgS. 4 B, 5 C). THE lENgTH Of THE INTESTINE IS 520 – 580 µm (N = 6). THE pOSTErIOr END AND ADHESIvE glANDS ArE IDENTIcAl TO THOSE Of M. shiyanensis (FIgS. 4 A, 5 A, 5 D, 6 A). THE fEmAlE rEprODUcTIvE SYSTEm Of Macrostomum lankouensis n. sp. IS SImIlAr TO THAT Of M. shiyanensis N. Sp .. THE OvArIES, 230 – 230 µm IN lENgTH AND 35 – 48 µm IN wIDTH (N = 12), ArE lOcATED ON EITHEr SIDE Of THE INTESTINE AT 50 % Of THE bODY lENgTH. THE fEmAlE ATrIUm IS lOcATED pOSTErIOr TO THE INTESTINE (FIgS. 5 A, 6 A), AND THE fEmAlE gONOpOrE OpENS AT THE vENTrAl SIDE Of THE fEmAlE ATrIUm. (FIgS. 5 D, 6 B). AS fOr mAlE rEprODUcTIvE SYSTEm, THE TESTES, 195 – 250 µm IN lENgTH AND 30 – 50 µm IN wIDTH (N = 12), ArE lOcATED ON EITHEr SIDE Of THE INTESTINE AT 33 – 50 % Of THE bODY lENgTH. THE ArrANgEmENT Of vAS DEfErENTIA, fAlSE vESIcUlA SEmINAlIS (92 – 112 µm IN lENgTH, 23 – 45 µm IN wIDTH, N = 6), vESIcUlA SEmINAlIS (AbOUT 55 µm IN DIAmETEr, N = 6) AND vESIcUlA grANUlOrUm IS AlSO SImIlAr TO THAT Of M. shiyanensis n. sp. (FIgS. 4 C, 5 D, 6 B – C). THE C-SHApED pENIS STYlET IS 110 – 135 µm IN lENgTH, AND DIAmETErS Of ITS bASE rEgION AND DISTAl OpENINg ArE 30 – 40 µm AND 5 – 6 µm (N = 3), rESpEcTIvElY. ITS pOSTErIOr END IS A C-SHApED cUrvE, wHIlE THE DISTAl cIrcUlAr OpENINg pOINTS rIgHT JUST IN frONT Of THE mAlE gONOpOrE, wHIcH lIES bEHIND THE STYlET (FIgS. 5 D, 6 B). SImIlAr TO M. shiyanensis N. Sp., THE lENgTHS Of THE mATUrE SpErm, THE SHAfT, AND THE brUSHES Of M. lankouensis n. sp. ArE 75 – 80, 35 – 40, AND 3.5 – 5 µm (N = 3), rESpEcTIvElY. HOwEvEr, THE pAIrED brISTlES ArE 8 – 9 µm IN lENgTH (N = 3), lONgEr THAN THOSE Of M. shiyanensis n. sp. (FIgS. 4 J, 6 E). Taxonomic comparison. AmONg THE rEcOrDED SpEcIES Of THE gENUS Macrostomum, 19 SpEcIES HAvE THE C- SHApED pENIS STYlET, wHIlE EIgHT Of THESE 19 SpEcIES HAvE AN ADDITIONAl DISTAl cUrvE bESIDES THE C-SHApED cUrvE, wHIcH IS SImIlAr TO THAT Of M. lankouensis n. sp. (TAb. 4). AmONg THE EIgHT SpEcIES, THE DISTAl cUrvE Of M. bicurvistyla ArmONIES et al., 1987 pOINTS TO THE cONcAvE SIDE Of THE C-SHApED cUrvE, wHIlE THE DISTAl OpENINgS Of M. gilbert FErgUSON, 1939; M. pithecusae PApI, 1959; AND M. sinensis WANg, 2005 ArE SHArp. IN cONTrAST, THE DISTAl cUrvE Of M. lankouensis n. sp. pOINTS TO THE cONvEX SIDE Of THE “ C ” cUrvE AND THE OpENINg IS cIrcUlAr. IN M. johni YOUNg, 1972, THE pENIS STYlET IS 80 – 98 µm lONg. THE DISTAl cUrvE bENDS ApprOXImATE bY 90, wHIlE IT OpENS TOwArDS THE ANTErIOr END Of SpEcImEN. THE DIAmETEr Of THE DISTAl OpENINg IS 4.4 – 5.4 µm. AS fOr M. leptos AN-DEr-LAN, 1939, DEScrIpTION Of ITS pENIS STYlET IS NOT THOrOUgH, bUT OvErAll IT IS IN “ C ” SHApE AND ITS DISTAl pArT bENDS SlIgHTlY TOwArDS THE cONvEX SIDE Of THE C-SHApED cUrvE. IN cONTrAST, THE lENgTH Of THE STYlET Of M. lankouensis n. sp. IS 110 – 135 µm. THE EXTErIOr SIDE Of THE DISTAl cUrvE IS SEmIcIrcUlAr IN SHApE AND THE DISTAl END OpENS TOwArDS THE pOSTErIOr END Of SpEcImEN. Macrostomum gallicum AX, 2008 AND M. heyuanensis SUN et al., 2015 ArE mOST SImIlAr TO M. lankouensis n. sp. IN THE mOrpHOlOgY Of THEIr pENIS STYlE. IN THESE THrEE SpEcIES, THEIr pENIS STYlETS All HAvE DISTAl bENDS TOwArDS THE cONvEX SIDE Of THE “ C ” - SHApED cUrvE, wHIlE THEIr DISTAl OpENINgS ArE All cIrcUlAr. HOwEvEr, THE DISTAl ENDS Of THE pENIS STYlET Of M. gallicum AND M. heyuanensis ArE bOTH THIckENED, wHIlE SImIlAr THIckENINg IS AbSENT IN M. lankouensis n. sp. BASED ON THE DISTINcT mOrpHOlOgIcAl cHArAcTErISTIc Of pENIS STYlET Of M. lankouensis, IT IS EvIDENT THAT THIS SpEcIES IS A NEw SpEcIES wITHIN THE gENUS Macrostomum. * Measurement based on images and scales from the references. NA: not available. Phylogenetic analysis. THE pHYlOgENETIc TrEES gENErATED frOm cONcATENATED 18 S AND 28 S rDNA bY mAXImUm lIkElIHOOD (ML) AND NEIgHbOr JOININg (NJ) mETHODS ArE SHOwN IN FIgS 7 & 8. BOTH rESUlTS INDIcATE THAT THE THrEE SpEcImENS Of Macrostomum lankouensis N. Sp., AS wEll AS THOSE Of M. shiyanensis n. sp., clUSTEr TOgETHEr rESpEcTIvElY, fOrmINg A wEll-SUppOrTED clADE wITH THE OTHEr SpEcIES wITHIN THE gENUS Macrostomum. FUrTHErmOrE, OUr rESUlTS AlSO SHOw THAT THESE TwO NEw SpEcIES ArE clOSElY rElATED TO M. heyuanensis, M. finlandense AND M. sinensis, wHIlE M. acus IS clOSElY rElATED TO M. obtusa. AS SUcH, bOTH pHYlOgENETIc AND mOrpHOlOgIcAl EvIDENcE SUppOrT THE ESTAblISHmENT Of M. lankouensis n. sp. AND M. shiyanensis n. sp. AS NEw SpEcIES wITHIN THE gENUS.	en	Lin, Yi-Tao, Feng, Wei-Tao, Xin, Fan, Zhang, Lv, Zhang, Yu, Wang, An-Tai (2017): Two new species and the molecular phylogeny of eight species of Macrostomum (Platyhelminthes: Macrostomorpha) from southern China. Zootaxa 4337 (3): 423-435, DOI: 10.11646/zootaxa.4337.3.7
03D587BE3712FFA2C4C446C56022FCCF.taxon	discussion	Discussion. THE mOrpHOlOgY Of pENIS STYlETS IS ONE Of THE mOST ImpOrTANT crITErIA fOr THE clASSIfIcATION Of SpEcIES wITHIN THE gENUS Macrostomum (ZHAO et al. 2011). HOwEvEr, THE pENIS STYlET bENDS IN mUlTIplE plANES AND fOrmS A cOmplEX STrUcTUrE IN SOmE SpEcIES, INclUDINg M. xiamenensis WANg, 2004 A AND M. zhaoqingensis LIN et al., 2017, wHIlE SOmE Of THEIr pENIS STYlETS ArE qUITE SImIlAr (ScHärEr et al. 2011). THErEfOrE, IDENTIfIcATION Of NEw SpEcIES IS pArTIcUlArlY cHAllENgINg IN SOmE cASES. REcENTlY, A mOrE cOmprEHENSIvE STUDY USINg pHYlOgENETIc ANAlYSIS, TOgETHEr wITH cOmpArATIvE INvESTIgATION Of SpErm AND pENIS STYlET mOrpHOlOgY AND mATINg bEHAvIOr wAS cONDUcTED TO EXAmINE THE EvOlUTION AND cOEvOlUTION Of THE Macrostomum, SUggESTINg THAT IT IS AN EffIcIENT wAY TO ASSESS DIvErSITY AND EvOlUTION wITHIN THE gENUS (ScHärEr et al. 2011). TO DATE, SpErm mOrpHOlOgY HAS ONlY bEEN STUDIED IN A vErY lImITED NUmbEr Of SpEcIES wITHIN Macrostomum, wHIlE mOlEcUlAr SEqUENcES, INclUDINg 18 S rDNA, 28 S rDNA, COI AND wHOlE mITOcHONDrIA SEqUENcES, IS NOT AvAIlAblE Or AT lEAST NOT cOmplETE IN mANY rEcOrDED SpEcIES. IN THIS STUDY AND THrEE prEvIOUS STUDIES, wE HAvE prOvIDED DETAIlED INfOrmATION IN TErmS Of SpErm DESIgN AND mOrpHOlOgY Of pENIS STYlET IN EIgHT SpEcIES Of Macrostomum, INclUDINg M. heyuanensis, M. dongyuanensis SUN et al., 2015; M. zhujiangensis, M. baoanensis FANg et al., 2016; M. chongqingensis, M. zhaoqingensis LIN et al., 2017 (UNDEr rEvIEw); M. shenzhenensis, M. qiaochengensis WANg et al., 2017. AS fOr pHYlOgENETIc INfOrmATION, OTHEr THAN THE TwO NEw SpEcIES rEpOrTED IN THIS STUDY, wE HAvE AlSO SUpplEmENTED cONcATENATED 18 S AND 28 S rDNA SEqUENcES Of Macrostomum acus, M. obtusa, M. bicaudatum, M. dongyuanensis, M. heyuanensis AND M. sinensis. AlTHOUgH IT IS STIll fAr frOm prOvIDINg THE OvErAll pIcTUrE Of Macrostomum DIvErSITY AND EvOlUTION wITHIN THE rEgION, THIS STUDY SHOUlD prOvIDE bASElINE INfOrmATION fOr fUrTHEr STUDIES Of THE pHYlOgENY Of THE gENUS.	en	Lin, Yi-Tao, Feng, Wei-Tao, Xin, Fan, Zhang, Lv, Zhang, Yu, Wang, An-Tai (2017): Two new species and the molecular phylogeny of eight species of Macrostomum (Platyhelminthes: Macrostomorpha) from southern China. Zootaxa 4337 (3): 423-435, DOI: 10.11646/zootaxa.4337.3.7
