Table 3. A in Three new species and one subspecies of the Amynthas corticis - group from Guangxi Zhuang Autonomous Region, China (Oligochaeta, Megascolecidae)

Table 3. A comparison of characters of A. tortuosus sp. nov., A. carnosus, A. corticis, A. homosetus, A. exiguus aquilonius, and A. stricosus.
CharacteristicsA. tortuosus sp. nov.A. carnosusA. corticisA. homosetusA. exiguus aquiloniusA. stricosusBody length (mm)55-86110-34045-17011639-6372-97Body width (mm)2.5-2.84.0-9.03.0-6.05.21.9-2.62-2.8PigmentdorsumPurple brown before clitellum, light purple brown afterDark brown or purpleGreenish brownDark chocolate on anterior, grey on other partsDark reddish brownNo pigmentventrumLight purple brown before clitellum, no afterDark brown or purpleNoGreyLight gray on ventrumNo pogmentFirst dorsal pore13/1412/1310/11 or 12/13, usually at 11/1212/136/711/12 or 12/13Clitellum localityXIV–XVIXIV–XVIXIV–XVI, occasionally shorterXIV–XVIXIV–XVIXIV–XVISetal formulaAA=1.2-2.0AB, ZZ=1.4-2.0ZY-Spermathecal pores4 pairs, in 5/6-8/9, 0.25C4 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, 0.25C4 pairs, 5/6-8/9, ventral, 0.45C4 pairs, 5/6-8/9, 0.40CMale poresMiddle, round, surrounded by 3-4 rhombic ridges, 0.25CRound or ellipticSmall, circular to transverse elliptical di sc,0.24-0.30CRoundish glandular area, about 1.5mm in diameter, 0.25CRound, smooth, slightly elevated with a male aperture inconspicuous on lateral concave area, 0.23-0.30Con a coniform glandular disc surrounded by a round pad, 0.33CPapillae preclitellumFour pairs of postsetal genital papillae in VI–IX8 papillae just overhead 8 spermathecal pores, 2 pairs preclitellar arranged on VIII and IXPaired presetal and/or postsetal in some or all, near spermathecal poresInvisiblepresetal and postsetal, widely paired in 7, 8 and 9, number highly variableInvisiblePapillae postclitellum2 presetal crescent indented-topped genital papilla medial of male pores2 paired presetal genital on XVIII and IX, 1 pair postsetal genital on XVIIIPresent or absent, occasionally one or more near male poreInvisiblepresetal and postsetal, widely paired in XVII, XVIII and XIX, number highly variablepostsetal, single or paired in XVII, XIX and XXProstate glandsXVII–XXIIWell developedXVII–XX, rudimentary or absentXVI–XXIXVI–XX, wrinkledXVI–XX, coarsely lobateSpermathecaeAbout 2.4mm long, ampulla slender heart-shaped; duct shortAmpulla oval or pear-shaped, duct equal to or slightly shorter than ampullaAmpulla ovoid-Ampulla peach-shaped, stalk straight, much shorter than ampullaAbout 1.6mm long; ampulla heart-shaped, gradually slender duct as long as ampullaDiverticulumAbout 2.0mm long, terminal 4/5, swollen, S-shaped twisted seminal chamberOne-third to half of ampulla, slender stalk and a wider seminal chamberBlunt ovioid, straight stalkShorter, seminal chamber ovoid and whitishShorter, seminal chamber rudimentary or absent, straight or slightly bentAs long as main spermathecal axis, slender, terminal 0.4 dilated into a band shaped chamberAccessory glands1 stalked accessory gland observed near the ental part of each spermatheca-Stalked, coelomic, bound down to parietes or retained within body wallInvisibleround, stalked observed in spermathecal pores and male pores regionInvisible