Cataladrilus porquerollensis Marchán & Decäens, 2020

Marchán, Daniel F., Decaëns, Thibaud, Díaz Cosín, Darío J., Hedde, Mickaël, Lapied, Emmanuel & Domínguez, Jorge, 2020, French Mediterranean islands as a refuge of relic earthworm species: Cataladrilus porquerollensis sp. nov. and Scherotheca portcrosana sp. nov. (Crassiclitellata, Lumbricidae), European Journal of Taxonomy 701, pp. 1-22 : 6-10

Cataladrilus porquerollensis Marchán & Decäens sp. nov.

urn:lsid:zoobank.org:act:DE99E6A6-65EF-496A-AEAA-4F6FBAFA19CB

Fig. 2 , Table 3

and 16S (over diagonal).

Diagnosis

Specimens of Cataladrilus porquerollensis Marchán & Decäens sp. nov. can be distinguished from the other known species of Cataladrilus by the position of the clitellum in segments (19)20–32,33(34) and tubercula pubertatis in segments (28)29–31 ( Table 3). They resemble Cataladrilus (Latisinella) mrsici in the position of tubercula pubertatis and small body size, but differ in the position of the clitellum (22–32 in Ca. mrsici ), two pairs of seminal vesicles (three in Ca. mrsici ) and paired chaetae (separate in Ca. mrsici ).

Etymology

The species name is derived from Porquerolles, the island where this species was found.

Material examined

Holotype

FRANCE • adult; Provence-Alpes-Côte d’Azur, Var, Porquerolles Island ; 42.9961º N, 6.20393º E [Locality 3 (PQR3) ( Table 1 )]; 14 Mar. 2018; T. Decaëns, E. Lapied, M. Hedde and M. Zwicke leg.; olive grove; BOLD Sample ID: EW-PNPC-0098 ; UCMLT.

Paratypes

FRANCE – Provence-Alpes-Côte d’Azur • 10 specs; same collection data as for holotype; BOLD SampleID: EW-PNPC-0036 , EW-PNPC-0037 , EW-PNPC-0038 , EW-PNPC-0039 , EW-PNPC-0040 , EW-PNPC-0096 , EW-PNPC-0097 , EW-PNPC-0099 , EW-PNPC-0100 , EW-PNPC-0268 ; UCMLT • 10 specs; same collection data as for holotype; BOLD SampleID: EW-PNPC-0041 , EW-PNPC-0042 , EW- PNPC-0043 , EW-PNPC-0044 , EW-PNPC-0045 , EW-PNPC-0101 , EW-PNPC-0102 , EW-PNPC-0103 , EW-PNPC-0104 , EW-PNPC-0105 ; CEFE • 1 spec.; Var, Porquerolles Island ; 42.9988º N, 6.20025º E [Locality 1 (PQR1) ( Table 1 )]; 14 Mar. 2018; T. Decaëns, E. Lapied, M. Hedde and M. Zwicke leg.; meadow; BOLD SampleID: EW-PNPC-0173 ; CEFE • 6 specs; Var, Porquerolles Island ; 42.9955º N, 6.20609º E [Locality 2 (PQR2) ( Table 1 )]; 14 Mar. 2018; T. Decaëns, E. Lapied, M. Hedde and M. Zwicke leg.; vineyard; BOLD SampleID: EW-PNPC-0127 , EW-PNPC-0128 , EW-PNPC-0129 , EW-PNPC-0130 , EW-PNPC-0131 , EW-PNPC-0132 ; UCMLT • 2 specs; same collection data as for preceding; BOLD SampleID: EW-PNPC-0133 , EW-PNPC-0134 ; CEFE .

Morphological description

External morphology

Body pigmentation absent in live specimens. White-beige homogeneous color in fixed specimens ( Fig. 2 ).

Average length 48 mm (41–51 mm, n= 5adults);diameter 2mm (1.8–2.2mm, n= 5adults);body cylindrical in cross-section; average number of segments 196 segments (166–239, n = 5 adults; 239 segments in the holotype). Average weight (alcohol fixed specimens): 0.14 g (0.12–0.17 g, n = 5 adults). Prostomium epilobous. Longitudinal furrows in first 2–3 segments. First dorsal pore at the intersegmental furrow 10/11–11/12. Nephridial pores aligned in b. Spermathecal pores at the intersegmental furrows 9/10, 10/ 11 in c. Male pores in segment 15, surrounded by a well-developed porophore. Female pores inconspicuous. Clitellum saddle-shaped in segments (19)20–32,33(34). Tubercula pubertatis in segments (28)29–31. Chaetae very small and closely paired, with interchaetal ratio aa: 9, ab: 1, bc: 3, cd: 1, dd: 7 at segment 40. Chaetophores/genital papillae in segments 11, 13.

Internal anatomy

Septa 5/6–9/10 thickened and muscular. Hearts in segments 6–11, oesophageal. Calciferous glands in segments 11–13, without clear diverticles or enlargements. Crop in segments 15–16, gizzard in segments 17–18. Typhlosole bifid with a small intermediate ridge of varying development. Male sexual system holandric, testes and funnels (not enclosed in testes sacs, but with sperm present) located ventrally in segments 10 and 11. Two pairs of small seminal vesicles in segments 11 and 12, with free seminal masses filling most of these segments. Ovaries and female funnels in segment 13, ovarian receptacles (ovisacs) in segment 14. Two pairs of globular, intracelomic spermathecae in segments 9 and 10 (intersegments 9/10, 10/11). Nephridial bladders U-shaped, reclinate in segments 14, 20.

Distribution and ecology

Cataladrilus porquerollensis Marchán & Decäens sp. nov. is known from the island of Porquerolles in the Hyères Archipelago, France. This species has been found in meadows, vineyards and olive groves, thus appears to inhabit moderately to highly anthropized habitats.

Figures

Fig. 2. External morphology of Cataladrilus porquerollensis Marchán & Decäens sp. nov. a. Fixed specimen. b. Schematic drawing. Abbreviations: cl = clitellum; fp = female pore; mp = male pore; tp = tubercula pubertatis.