Table 4. A in Three new species and one subspecies of the Amynthas corticis - group from Guangxi Zhuang Autonomous Region, China (Oligochaeta, Megascolecidae)

Table 4. A comparison of characters of A. shengtangmontis shengtangmontis, A. shengtangmontis minusculus, A. carnosus, A. corticis. and A. pulvinus. CharacteristicsA. shengtangmontis shengtangmontisA. shengtangmontis minusculusA. carnosus (Goto & Hatai, 1899)A. corticis (Kinberg, 1867)A. pulvinus Sun & Qiu, 2013Body length (mm)100-13475-83110-34045-17093.5Body width (mm)4.2-5.13.0-3.24.0-9.03.0-6.03.4PigmentdorsumFrom brown to noPurple brownDark brown or purpleGreenish brownBuffventrumFrom brown to noNoDark brown or purpleNoNoFirst dorsal pore12/1311/1212/1310/11 or 12/13, usually at 11/1212/13Clitellum localityXIV–XVIXIV–XVIXIV–XVIXIV–XVI, occasionally shorterXIV–XVISpermathecal pores4 pairs, in 5/6-8/9, 0.40C4 pairs, in 5/6-8/9, 0.40C4 pairs in 5/6-8/9 or 3 pairs in 6/7-8/9, 0.33C4 pairs, 5/6-8/9, 0.33C4 pairs, in 5/6-8/9, 0.33CMale poresLarge raised, round, surrounded by 2 circular ridges, 0.44CRaised, elliptic, surrounded by 6 circular ridges, 0.40CRound or ellipticSmall, circular to transverse elliptical disc, 0.24-0.30CSlightly elevated round, 0.33CPapillae preclitellumFour pairs of postsetal genital papillae arranged in VI–IXThree pairs of postsetal genital papillae arranged in VI–VIII8 papillae just overhead 8 spermathecal pores, 2 pairs preclitellar arranged on VIII and IXPaired presetal and/or postsetal in some or all, near spermathecal poresInvisiblePapillae postclitellum2 presetal indented-topped genital medial of porophore2 small indented-topped genital papillae medial of male pore2 paired presetal genital on XVIII and IX, 1 pair postsetal genital on XVIIIPresent or absent, occasionally one or more near male poreRectangle-shaped, on 17/18-18/19Prostate glandsXV–XXIIXVI–XXIWell developedXVII–XX, rudimentary or absentXVII–XXSpermathecaeAbout 2.2-3.0mm long, ampulla of the first three pairs heart-shaped, duct stalk. Ampulla of the forth pair long-oval, duct as long as 1/6 ampullaAbout 2.2-2.7mm long, duct as long as 1/2 ampullaAmpulla oval or pear-shaped, duct equal to or slightly shorter than ampullaAmpulla ovoidAbout 2.4mm long, ampulla slender heart-shaped; duct shortDiverticulumAs long as main chain, U-shaped twisted in middle, terminal 4/5, club-shaped seminal chamber of the first three pairs and terminal 1/3 dilated into a chilli-shaped seminal chamber of the forth pairAs long as main chain, terminal 1/2, long club-shaped seminal chamberOne-third to half of ampulla, slender stalk and a wider seminal chamberBlunt ovioid, straight stalkShorter, terminal 1/5, small ovoid plump seminal chamberAccessory glands1 round semitransparent accessory gland present near the medial area of each spermatheca, 2 stalk accessory glands observed near the medial of the distal part of the prostatic duct6 semitransparent elliptic accessory glands observed near the distal part of the last three pairs spermathecae-Stalked, coelomic, bound down to parietes or retained within body wallA pair, cling to body wall, irregular in shape, and extended from XVII–XIX表4 圣唐山蚓指名亚种（A. shengtangmontis shengtangmontis）、圣唐山蚓小型亚种（A. shengtangmontis minusculus）、肉质蚓（A. carnosus (Goto & Hatai, 1899)）、皮栖蚓（A. corticis (Kinberg, 1867)）与垫状蚓（A. pulvinus Sun & Qiu, 2013）的特征比较 1. 体长（mm）：圣唐山蚓指名亚种100~134，圣唐山蚓小型亚种75~83，肉质蚓110~340，皮栖蚓45~170，垫状蚓93.5 2. 体宽（mm）：圣唐山蚓指名亚种4.2~5.1，圣唐山蚓小型亚种3.0~3.2，肉质蚓4.0~9.0，皮栖蚓3.0~6.0，垫状蚓3.4 3. 体色 - 背面：圣唐山蚓指名亚种从褐色至无色素，圣唐山蚓小型亚种为紫褐色，肉质蚓为深褐色或紫色，皮栖蚓为绿褐色，垫状蚓为米黄色 - 腹面：圣唐山蚓指名亚种从褐色至无色素，圣唐山蚓小型亚种无色素，肉质蚓为深褐色或紫色，皮栖蚓无色素，垫状蚓无色素 4. 首个背孔：圣唐山蚓指名亚种为12/13节段，圣唐山蚓小型亚种为11/12节段，肉质蚓为12/13节段，皮栖蚓为10/11或12/13节段（通常为11/12节段），垫状蚓为12/13节段 5. 环带位置：圣唐山蚓指名亚种为XIV~XVI节，圣唐山蚓小型亚种为XIV~XVI节，肉质蚓为XIV~XVI节，皮栖蚓为XIV~XVI节（偶有缩短），垫状蚓为XIV~XVI节 6. 受精囊孔：圣唐山蚓指名亚种4对，位于5/6~8/9节段，孔径约为体宽的0.40倍；圣唐山蚓小型亚种4对，位于5/6~8/9节段，孔径约为体宽的0.40倍；肉质蚓4对位于5/6~8/9节段或3对位于6/7~8/9节段，孔径约为体宽的0.33倍；皮栖蚓4对，位于5/6~8/9节段，孔径约为体宽的0.33倍；垫状蚓4对，位于5/6~8/9节段，孔径约为体宽的0.33倍 7. 雄孔：圣唐山蚓指名亚种为大型隆起圆形雄孔，周围环绕2圈环状脊，孔径约为体宽的0.44倍；圣唐山蚓小型亚种为隆起椭圆形雄孔，周围环绕6圈环状脊，孔径约为体宽的0.40倍；肉质蚓为圆形或椭圆形；皮栖蚓为小型圆形至横椭圆形盘状雄孔，孔径约为体宽的0.24~0.30倍；垫状蚓为轻微隆起的圆形雄孔，孔径约为体宽的0.33倍 8. 环前生殖乳突：圣唐山蚓指名亚种具4对刚毛后生殖乳突，分布于VI~IX节；圣唐山蚓小型亚种具3对刚毛后生殖乳突，分布于VI~VIII节；肉质蚓具8个乳突紧邻8个受精囊孔，另有2对环前生殖乳突位于VIII和IX节；皮栖蚓部分或全部个体具成对刚毛前/后生殖乳突，紧邻受精囊孔；垫状蚓不可见 9. 环后生殖乳突：圣唐山蚓指名亚种具2个具凹陷顶端的生殖内侧乳突，位于雄孔孔区；圣唐山蚓小型亚种具2个具凹陷顶端的小型生殖乳突，位于雄孔内侧；肉质蚓具2对刚毛前生殖乳突位于XVIII与IX节，1对刚毛后生殖乳突位于XVIII节；皮栖蚓乳突存在或缺失，偶有1个或多个乳突紧邻雄孔；垫状蚓为矩形，位于17/18~18/19节段 10. 前列腺腺：圣唐山蚓指名亚种为XV~XXII节，圣唐山蚓小型亚种为XVI~XXI节，肉质蚓发育良好，皮栖蚓为XVII~XX节（退化或缺失），垫状蚓为XVII~XX节 11. 受精囊：圣唐山蚓指名亚种长约2.2~3.0mm，前3对受精囊的壶腹呈心形，具管柄；第4对受精囊的壶腹呈长椭圆形，管长约为壶腹的1/6；圣唐山蚓小型亚种长约2.2~2.7mm，管长约为壶腹的1/2；肉质蚓的壶腹呈椭圆形或梨形，管长等于或略短于壶腹；皮栖蚓的壶腹呈卵圆形；垫状蚓长约2.4mm，壶腹呈细长心形，管短 12. 受精囊盲囊：圣唐山蚓指名亚种与主链等长，中部呈U形扭曲，前3对的末端4/5处为棒状储精室，第4对的末端1/3处膨大呈辣椒状储精室；圣唐山蚓小型亚种与主链等长，末端1/2处为长棒状储精室；肉质蚓长度为壶腹的1/3~1/2，具细长管柄和较宽的储精室；皮栖蚓为钝卵圆形，管直；垫状蚓较短，末端1/5处具小型卵圆形饱满储精室 13. 副腺：圣唐山蚓指名亚种每个受精囊内侧区域附近具1个圆形半透明副腺，前列腺管远端内侧可见2个具柄副腺；圣唐山蚓小型亚种最后3对受精囊的远端附近可见6个半透明椭圆形副腺；肉质蚓具柄，体腔来源，附着于体壁或保留于体壁内；皮栖蚓具1对，附着于体壁，形状不规则，分布于XVII~XIX节；垫状蚓具1对，附着于体壁，形状不规则，分布于XVII~XIX节