Enchytraeus, Henle, 1837

Lu, Yajing, Xie, Zhicai & Zhang, Junqian, 2018, Preliminary taxonomical investigation of soil enchytraeids (Clitellata, Enchytraeidae) from south region of Tibet, China, Zootaxa 4496 (1), pp. 395-410 : 407-408

Enchytraeus sp.

Examined material. TWO SPEcimENS iN 70% EThaNOl.

Descriptions. Small SPEciES. BOdY lENgTh 1.9–2.4 mm (4–9 mm iN ViVO). BOdY WidTh 210–260 Μm aT V, 250– 320 Μm aT XII. HEad PORE aT 0/I, lONgiTUdiNal. EPidERmal glaNd cEllS iNcONSPicUOUS, 3–4 TRaNSVERSE ROWS PER SEgmENT. ChaETaE FORmUla: 2,3 – 2,3: 2,3 –2,3. CliTEllUm aT XII–XIII, SlighTlY ElEVaTEd, cEllS iN TRaNSVERSE PaTTERN, hYalOcYTES mORE ThaN gRaNUlOcYTES. BRaiN cONcaVE aNTERiORlY, TRUNcaTE POSTERiORlY, 100–110 Μm iN lENgTh, 55–64 Μm iN WidTh. ONE PaiR OF OESOPhagEal aPPENdagES aT IV–V, STOUT, WiThOUT bRaNchES. ThREE PaiRS OF PhaRYNgEal glaNdS aT IV/V–VI/VII, all SEPaRaTE dORSallY. ThE ThiRd PaiR WiTh VENTRal lObES. FiVE PaiRS OF PREcliTEllaR NEPhRidia iN VI/VII–X/XI. DORSal blOOd VESSEl RiSiNg FROm XII–XIII. BlOOd cOlORlESS. COElOmOcYTES 15–19 Μm iN diamETER. SPERm FUNNEl Small, 2–2.5 TimES aS lONg aS WidE, 68–76 Μm iN lENgTh, aNd 24–27 Μm iN WidTh. COllaR cONSPicUOUS, SlighTlY SmallER ThaN FUNNEl bOdY, 3–5 Μm high. VaS dEFERENS lONg aNd ThiN, iRREgUlaR WOUNd iN lOOPS iN XII. SEmiNal VESiclE iN XI, Small. SPERmaThEca WiTh EcTal glaNdS. EcTal dUcT 54–60 Μm lONg, 12–15 Μm WidE, gRadUallY WidENiNg. AmPUlla SPiNdlE-ShaPEd. ENTal dUcT 10–13 Μm lONg. 1–10 maTURE EggS aT a TimE.

Remarks. IN ChiNa, Enchytraeus SP. WaS FOUNd iN ChaNgbai MOUNTaiN OF JiliN PROViNcE aNd TibET.