TABLE 2 in Description of a new species of freshwater shrimp (Decapoda: Caridea: Atyidae) from Mount Danxia, Guangdong, China, based on morphological and molecular evidence

TABLE 2. Key morphological differences between Caridina danxiaensis and morphologically similar species.
SpeciesLocalityRostrum lengthStyloceriteRostrum formulaSpiniformReferenceCaridina danxiaensisRenhua County,Reaching to midlength ofMostly reaching beyond distal end of5–8+7–8/019–23this study(this study)Guangdong Province,second segment of antennularbasal segment of antennular peduncle,Chinapedunclenot to the middle of second segment ofantennular peduncleCaridina acuta *Libo County,Reaching to or slightlyNot reaching distal end of basal segment0+0–2/017–18Liang et al.Guizhou Province,exceeding distal margin ofof antennular peduncle(2005)Chinabasal antennular segment, notreaching as far as middle ofsecond segmentCaridina baoting *Hainan Province,Reaching to or slightlyMostly reaching distal end of basal0+1–4/123Cai (2014)Chinaexceeding distal margin ofsegment of antennular pedunclebasal antennular segment, notreaching as far as middle ofsecond segmentCaridina breviataHailing Dao Island,Reaching to or slightlyReaching beyond distal end of basal0–2+6/016–20Liang (2004)Guangdong Province,exceeding distal margin ofsegment of antennular peduncle, notChinabasal antennular segmentto the middle of second segment ofantennular peduncleCaridina cantonensisQingyuan,Reaching to second segmentReaching beyond distal end of basal5–7+2–12/2–612–21Liang (2004)Guangdong Province,of antennular pedunclesegment of antennular peduncle, evenChinato the middle of second segment ofantennular peduncleCaridina caobangensisNorthern VietnamReaching to secondMostly reaching beyond distal end of5–7+7–11/3–421–22Li & Liangsegment or third segment ofbasal segment of antennular peduncle,(2002)antennular pedunclenot to the middle of second segment ofantennular peduncleCaridina cavernicolaDu’an County,Overreaching to thirdNot reaching distal end of basal segment7–10+18–29/20–2412–15Liang (2004)Guangxi Province,segment of antennularof antennular peduncleChinapeduncleCaridina clinataNorthern VietnamReaching to or slightlyNot reaching distal end of basal segment2–5+10–10/2–514–17Cai et al. (1999)exceeding distal margin ofof antennular pedunclebasal antennular segment, notreaching as far as middle ofsecond segmentCaridina conghuensisNew Territories,Reaching to midlength orReaching beyond distal end of basal3–5+7–9/2–417–21Klotz & VonHong Kong, Chinaend of second segment ofsegment of antennular peduncle, notRintelen (2014)antennular peduncleto the middle of second segment ofantennular peduncleCaridina cucphuongensisNorthern VietnamJust overreaching the eyesReaching to end of second segment of1–3+5–7/0–218–21Yen, et al.to reaching to the base ofantennular peduncle or at least 0.7 times(2021)second segment of antennularof itpeduncleCaridina formosaeTaiwan Province,Not reaching to distalNot reaching distal end of basal segment0/019–22Liang (2004)Chinamargin of basal segment ofof antennular peduncleantennular peduncleCaridina haivanensisThua Thien-Hue, HaiReaching to or slightlyNot reaching to distal end of basal0+4–11/1–313–16Tan (1990)Van, Vietnamexceeding distal margin ofsegment of antennular pedunclebasal antennular segment, notreaching as far as middle ofsecond segmentCaridina huananensisGuangdong Province,Not reaching to distalNearly reaching to distal end of basal0/121–24Liang (2004)Chinamargin of basal segment ofsegment of antennular peduncleantennular peduncleCaridina jiangkou *Jiangkou County,Short, straight, reaching toReaching 0.75 basal segment length of0–5+4–7/1–5.13Cai & Ng (2018)Guizhou Province,distal end of basal segment ofantennular peduncleChinaantennular peduncleCaridina lanceifronsSouthern ChinaOverreaching to thirdNot reaching to distal end of basal4+10–19/2–515–19Liang (2004)segment of antennularsegment of antennular pedunclepeduncleCaridina logemanniNew Territories,Reaching to end of basalReaching to 0.40–0.50 times of second3–7 + 7–15 / 0–617–22Klotz & VonHong Kong, Chinasegment of antennularsegment of antennular peduncleRintelen (2014)peduncle, 0.30–0.48 (median0.37) times as long ascarapaceCaridina longshanLongshan County,Long, reaching from end ofNot reaching to distal end of basal6–7+12–15/12–1711–12Cai & Ng (2018)Hunan Province,antennular peduncle to end ofsegment of antennular peduncleChinascaphoceriteCaridina maculataYingde County,Short, nearly reaching the endReaching beyond distal end of basal1–3+6–11/2–322Wang et al. 2008Guangdong Province,of 1st segment of antennalsegment of antennular peduncleChinapeduncleCaridina macauensis *Macau, ChinaNever reaching beyond distalReaching beyond distal end of basal0+0–3/1–318–20Zhou et al.end of basal segment ofsegment of antennular peduncle, even(2021)antennular peduncle in lateralto the middle of second segment ofviewantennular peduncleCaridina mariaeNew Territories,Reaching to midlength ofMostly reaching to end of second4–6 + 6–9/1–216–20Klotz & VonHong Kong, Chinasecond segment of antennularsegment of antennular peduncle or atRintelen (2014)peduncle or less frequent toleast 0.7 times of itbegin or end of this segmentCaridina namdatBac Kan Province,Reaching to middle ofReaching to 0.8 times length of basal0/015–18Do et al. (2021a)Northeast Vietnambasal segment of antennularsegment of antennular pedunclepeduncleCaridina nanaoensisGuangdong Province,Reaching as far as middle ofReaching as far as middle of second5–8+5–18/2–618–24Liang (2004)Chinasecond segmentsegment antennular peduncleCaridina nguyeniCao Bang, Ha Quang,Reaching to secondReaching as far as middle of second9–12+8–16/4–612–18Li & LiangTruong Ha, Pac Bo,segment or third segment ofsegment antennular peduncle(2002)Vietnamantennular peduncleCaridina pacboCao Bang, Ha Quang,Short, reaching beyondMostly reaching beyond the end of basal2–6+5–12/0–319–20Do et al. (2020)Truong Ha, Pac Bo,middle or close to end ofsegment, sometimes to the middle ofVietnambasal segment of antennularsecond segment of antennular pedunclepeduncleCaridina pingi *Jiangsu Province,Overreaching the distalNot reaching distal end of basal segment0+9–16/0–416–20Liang (2004)Chinamargin of second antennularof antennular pedunclesegmentCaridina pseudoserrataCao Bang, QuangReaching the middle of the/5–6+5–13/1–219–21Dang & DoYen, Tu Do, Vietnamsecond antennular segment(2007)Caridina rubropunctataThai Nguyen, DongOverreaching the 2ndReaching as far as middle of second5–7+5–11/2–416–19Dang & DoHy, Van Lang,segment to the middle ofsegment antennular peduncle(2007)Vietnamthe 3nd segment of theantennular peduncleCaridina serrataNew territories, HongReaching to base of secondNearly reaching the middle of second0–5+5–12/0–618–21Cai & Ng (1999)Kong, Chinasegment of antennularsegment antennular pedunclepeduncle or nearly to distalend of this segmentCaridina sinanensisPengjiaao, TangtouReaching to the end of theShort, reaching 0.75–0.88 length of basal4–10+10–16/3–1110–12Xu et al. (2020)Town, Sinan County,2nd segment of antennularsegmentGuizhou Province,peduncleChinaCaridina songtaoensis *Guizhou Province,Exceeding distal margin ofNot reaching to distal end of basal2–4 (usually2–16–19Liang (2004)Chinabasal antennular segment orsegment of antennular peduncle3)+5–11/3–5reaching to middle of secondsegmentCaridina spinicrus *Beiliu County,Straight, reaching anteriorReaching 0.7 basal segment length of7+10/113Cai & Ng (2018)Guangxi Province,half of second segment ofantennular peduncleChinaantennular peduncle,Caridina tetrazona *Guizhou Province,Nearly reaching to or slightlyMostly reaching beyond the end of basal3–8 (usually 5–18–20Chen et al.Chinareaching beyond end ofsegment, sometimes to the middle of7)+4–6/1–2(2020)1st segment of antennularsecond segment of antennular pedunclepeduncleCaridina thachlamNorthern VietnamNever reaching beyondNot reaching to distal end of basal0–1/0–19Do et al.end of basal segment ofsegment of antennular peduncle(2021b)antennular peduncleCaridina tricinctaNorthern VietnamReaching to middle orReaching distal end of basal segment of0–3+0–6/0–512–18Do et al. (2020)slightly falling short of distalantennular peduncleend of basal segment ofantennular peduncleCaridina trifasciataHenquin Island nearReaching near to end ofReaching beyond end of basal segment4+7–10/1–418–20Yam & CaiZhuhai, Guangdongsecond segment of antennularof antennular peduncle, not extending to(2003)Province & Hongpeduncle, or slightly beyondmiddle of second segmentKong, ChinaitCaridina venustaYingde County,Only reaching to mid or oftenSlightly beyond basal segment of0/021–24Wang et al.Guangdong Province,to end of eyes, occasionallyantennular peduncle(2008)Chinaextending to near distal endof 1 st segment of antennularpeduncleCaridina yunnanensisYunnan Province,Reaching to second segmentNot reaching distal end of basal segment5–7+4–12/2–813–14Liang (2004)Chinaof antennular peduncleof antennular peduncle
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Note: Rostrum formula is presented as: number of dorsal teeth on the carapace posterior margin of orbital margin + number of dorsal teeth on the rostrum anterior to the orbital margin/number of ventral teeth of the rostrum; Spiniform setae are on uropodal diaeresis;*: species without 16S rRNA sequence data.