Fridericia paroniana Issel, 1904

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 : 402-403

Fridericia paroniana Issel, 1904

Fridericia paroniana Issel, 1904 . Issel 1905; Nielsen & Christensen 1959; Rota & Healy 1994; Rota 1994; Rota 1995; Xie et al., 1999a; Schmelz 2003; Schmelz & Collado 2010.

Fridericia nielseni Dash, 1972 .

Fridericia maculata Issel ssp. macroglandulosa Dózsa-Farkas, 1989 .

For further synonymies see Schmelz (2003).

Examined materia l. XZO201610001, XZ201610002, XZO20161003, ThREE FUllY maTURE SPEcimENS, FiXEd, STaiNEd, WhOlE mOUNT. MORE ThaN 10 SPEcimENS PRESERVEd iN 70% EThaNOl.

Descriptions. Small SiZE. BOdY lENgTh 4–5 mm (4–9 mm iN ViVO). BOdY WidTh 200–250 Μm aT V, 270–330 Μm aT XII. SEgmENT NUmbER 40–45. ChaETaE STOUT, USUallY 2 PER bUNdlE. EPidERmal glaNd cEllS cONSPicUOUS, 2–3 ROWS PER SEgmENT. CliTEllUm aT XII–1 /2XIII, giRdlE-ShaPEd, gRaNUlOcYTES mORE NUmEROUS ThaN hYalOcYTES. BRaiN WEaklY cOVEX aNTERiORlY, ROUNd OR TRUNcaTE POSTERiORlY, 140–170 Μm lONg, 80–100 Μm WidE. OESOPhagEal aPPENdagES STOUT, UNbRaNchEd. ThREE PaiRS OF PhaRYNgEal glaNdS iN IV–VI, ThE FiRST PaiR WiTh dORSal cONNEcTiON. FiVE PaiRS OF PREcliTEllaR NEPhRidia FROm VI/VII–X/XI, aNTESEPTalE 43–48 Μm lONg, 20–26 Μm WidE, POSTSEPTalE 80–94 Μm lONg, 30–47 Μm WidE, EFFERENT dUcT aRiSiNg FROm ThE middlE OF ThE POSTSEPTalE. COElEmO-mUcOcYTES NUmEROUS, 22–36 Μm iN diamETER, lENTicYTES 8–12 Μm iN diamETER. ChYlUS cEllS iN XIV–XVI. DORSal blOOd VESSEl aRiSiNg FROm XVIII. BlOOd cOlORlESS. SPERm FUNNEl Small, cYliNdRical, 95–114 Μm lONg, 40–50 Μm WidE, cOllaR aS WidE aS OR SlighTlY NaRROWER ThaN FUNNEl bOdY, 40–45 Μm WidE. HEadS OF SPERmaTOZOa 45–55 Μm iN lENgTh. VaS dEFERENS 7–9 Μm WidE, iRREgUlaR WOUNd iN lOOP iN XII. BURSal SliT lONgiTUdiNal, SOmETimES “T-ShaPE”. NO SUbNEURal glaNdS. SPERmaThEca laRgE, WiTh 1–2 laRgE, FlOPPY EcTal glaNdS. AmPUlla ShaPE VaRiOUS, WiTh 2 Sac-likE diVERTicUla, EcTal dUcT lONg, 155– 173 Μm lONg, 10–13 Μm WidE. ENTal dUcTS cONNEcT SEPaRaTElY TO ThE OESOPhagUS. USUallY 1 OR 2 maTURE Egg aT a TimE.

Differential diagnosis. OUR SPEcimENS cONFORm WEll TO ThE dEScRiPTiON OF F. paroniana giVEN bY SchmElZ (2003) aNd XiE et al. (1999a). ThiS SPEciES iS WidESPREad iNclUdiNg GERmaNY, DENmaRk, NEThERlaNdS, IRElaNd, AUSTRia, HUNgaRY, SPaiN, ITalY, AlgERia, TURkEY, NORTh AmERica aNd MOROccO. IN ChiNa, iT WaS FOUNd iN SichUaN, HUbEi, aNd JiliN PROViNcES aNd TibET.