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