Fridericia perrieri ( Vejdovský, 1878 )

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 : 400

Fridericia perrieri ( Vejdovský, 1878)

( FigURES 3D, E )

Enchytraeus perrieri Vejdovský, 1878 .

Fridericia perrieri (Vejdovský) . Michaelsen 1900; Nielsen & Christensen 1959; Christensen 1961; Chaluspký 1988; Rota 1994; Rota & Healy 1994; Rota 1995; Rota & Healy 1999; Schmelz 2002; Schmelz & Collado 2010.

For further synomymies see Schmelz (2003).

Examined material. XZO201604009, ONE adUlT STaiNEd aNd WhOlE-mOUNTEd SPEcimEN. FOUR SPEcimENS iN 70% EThaNOl.

Descriptions. MEdiUm SiZE. BOdY lENgTh 11–24 mm. SEgmENT NUmbER 61. BOdY WidTh 470 Μm aT V aNd 530 Μm aT XII. HEad PORE aT 0/I, lONgiTUdiNal SliT. BRaiN WidTh 110 Μm, lENgTh 150 Μm. A maXimUm NUmbER OF 6 chaETaE PER bUNdlE. BOdY Wall cOmPaRaTiVElY Thick. EPidERmal glaNd cEllS diSTiNcT, 3 OR 4 ROWS iN aNTEcliTEllaR SEgmENTS. PhaRYNgEal glaNdS all SEPaRaTEd. OESOPhagEal aPPENdagES WiThOUT bRaNchES OR WiTh FEW bRaNchES iN POSTERiOR PaRT. BOTh TYPES OF cOElOmOcYTES NUmEROUS. MUcOcYTES PalE, WiTh Small aNd blURREd VESiclES aNd WaVY cEllUlaR OUTliNE, lENTicYTES 5 Μm lONg aNd 1.25 Μm WidE. FiVE PaiRS OF PREcliTEllaR NEPhRidia FROm VI/VII TO X/XI. ANTESEPTalE abOUT 75 Μm lONg aNd 35 Μm WidE, POSTSEPTalE abOUT 120 Μm lONg aNd 40 Μm WidE. ChYlUS cEllS iN XV–XVI. DORSal blOOd VESSEl RiSiNg FROm XXIV. CliTEllUm aT XII–1 /3XIII, giRdlE-ShaPEd. SPERm FUNNEl 2–3 TimES aS lONg aS WidE, TaPERiNg diSTad iNTO VaS dEFERENS, abOUT 250 Μm iN lENgTh aNd 125 Μm iN WidTh ( Fig. 3E ). COllaR NaRROWER ThaN FUNNEl bOdY. SPERmaTOZOa 350 Μm lONg. SEmiNal VESiclE abSENT. VaS dEFERENS VERY lONg, NaRROW, aNd WOUNd iN iRREgUlaR lOOPS. SUbNEURal glaNdS abSENT. MalE cOPUlaTORY ORgaN cOmPacT aNd ROUNdEd, glaNdUlaR bUlb glObUlaR. SPERmaThEca WiThOUT EcTal glaNd. EcTal dUcT lONg aNd NaRROW, WiTh caNal STRaighTlY ENTERiNg ThE amPUlla. AmPUlla WiTh 2–3 diVERTicUla, TWO cONSPicUOUSlY laRgER ONES, “U” ShaPE ( Fig. 3D ). AmPUlla Small, 75 Μm iN lENgTh aNd 50 Μm iN WidTh, diVERTicUla 75–100 Μm lONg aNd, 50 Μm WidE. ENTal dUcT aNd amPUlla baRElY diSTiNgUiShEd, ShORT, abOUT 15 Μm lONg, 25 Μm WidE. TWO maTURE EggS aT a TimE.

Differential diagnosis. OUR SPEcimENS haVE maNY chaRacTERS iN cOmmON WiTh ThE dEScRiPTiON OF F. perrieri giVEN bY SchmElZ (2003), EXcEPT FOR PhaRYNgEal glaNdS (all SEPaRaTEd VS WidE cONNEcTiON iN IV), dORSal blOOd VESSEl (XXIV VS XVIII–XXII) aNd SEmiNal VESiclE (abSENcE VS PRESENcE). HOWEVER, bEcaUSE ThE lOcaTiON OF ThE dORSal blOOd VESSEl VaRiES iN ThiS SPEciES, aNd ThE SEmiNal VESiclE mighT NOT bE ObSERVEd aFTER FiXaTiON, WE TENd TO idENTiFY ThiS SPEciES aS F. perrieri .

Figures

FIGURE 3. Micrographs of Fridericia bulboides Nielsen & Christensen, 1959 (A, in vivo), Fridericia cusanica Schmelz, 2003 (B, C, fixed), Fridericia perrieri (Vejdovský, 1878) (D, E, fixed), and Fridericia bretscheri Southern, 1907 (F–I, in vivo). Fridericia bulboides: A. Epidermal gland cells (arrows). Fridericia cusanica: B. Pharyngeal glands. C. Spermatheca (arrow). Fridericia perrieri: D. Spermatheca with diverticula (arrows). E. Sperm funnel (arrow). Fridericia bretscheri: F. Spermathecae (arrows). G. Oesophageal appendages. H. Clitellar glands, dorsal view. I. Coelomocytes. Scale bars: H,I: 25µm; A,C,D,E,F,G: 50 µm; B: 100 µm.