Ocnerodrilus occidentalis Eisen, 1878

Rota, Emilia, 2013, From Corsica to Britain: new outdoor records of Ocnerodrilidae (Annelida: Clitellata) in western Europe, Biodiversity Data Journal 1, pp. 985-985 : 985

Rank: SpeciesType of treatment: Redescription or species observationextantHabitat: freshwaterRoot classification: 8

Ocnerodrilus occidentalis Eisen, 1878

Materials

Occurrence: recordedBy: L. Braida & T. Braida; individualCount: 2; lifeStage: adults; Location: waterBody: Torrente Argentina; country: Italy; stateProvince: Liguria; county: Imperia; municipality: Taggia; verbatimLocality: bed of Torrente Argentina; verbatimElevation: 26 m a.s.l.; verbatimDepth: 40 cm; verbatimCoordinates: 43°50'56"N, 7°51'34"E; Event: eventDate: 08-Dec-2006; eventRemarks: along with Microscolexphosphoreus (1 adult) Occurrence: recordedBy: L. Braida & T. Braida; individualCount: 1; lifeStage: juvenile; Location: waterBody: Torrente Argentina; country: Italy; stateProvince: Liguria; county: Imperia; municipality: Taggia; verbatimLocality: bed of Torrente Argentina; verbatimElevation: 26 m a.s.l.; verbatimDepth: 40 cm; verbatimCoordinates: 43°50'56"N, 7°51'34"E; Event: eventDate: 08-Dec-2006; eventRemarks: along with Microscolexphosphoreus (1 adult) Occurrence: recordedBy: P. Omodeo & P. Negrisolo; individualCount: 1; Location: waterBody: Battaglia Terme; country: Italy; stateProvince: Padova; municipality: Veneto; verbatimLocality: edge of thermal water ditch bordering grassfield outside Villa Selvatico, between the railway and former "Pietro d’Abano” spa; verbatimCoordinates: 45°17'10"N, 11°46'34"E; Event: eventDate: September 1982; eventRemarks: along with Dichogastermodiglianii (1 adult) and Microscolexphosphoreus (5 adults)

Diagnosis

Body size 30-40 x 1-1.4 mm. Segment number 60-80. Easily identified by the annular clitellum covering XIII-XIX or XIII-XX marked ventrally by small paired male porophores on XVII (Fig. 3); the latter generally connected by a ventral transverse groove. No gizzard. Calciferous glands as large paired fan-shaped diverticula originating posteriorly in IX. Spermathecae absent. Prostates one pair, much elongated (can reach XXIV), opening close to male pores.