Nouraguesia parare, Csuzdi & Pavlíček, 2011

Csuzdi, Csaba & Pavlíček, Tomáš, 2011, A new earthworm genus Nouraguesia gen. nov. from French Guiana with description of two new species (Oligochaeta, Glossoscolecidae), Journal of Natural History 45 (27 - 28), pp. 1759-1767 : 1764-1766

publication ID	https://doi.org/ 10.1080/00222933.2011.560727
persistent identifier	https://treatment.plazi.org/id/8768980D-043A-C325-F2C3-FF5F8D49A2EE
treatment provided by	Felipe
scientific name	Nouraguesia parare
status	sp. nov.

Treatment

Nouraguesia parare sp. nov.

( Figure 2A–C View Figure 2 )

Material examined

Holotype. HNHM / 5439 View Materials , French Guiana, Nouragues Natural Reserve , station Pararé. Coll. T. Pavlíček, 2 July 2009.

Paratypes. HNHM / 5441 View Materials three ex. French Guiana, Nouragues Natural Reserve , Inselberg camp, in tree trunk. Coll . T. Pavlíček, 12 July 2009 . HNHM / 5520 View Materials one ex. French Guiana, Matoury , beneath palm leaf-axil on the trunk. Coll . T. Pavlíček, 10 July 2010 .

Derivatio nominis

The species is named after the type locality Pararé in the Nouragues Reserve, French Guiana .

Diagnosis

L, 160–210 mm; D, 11–15 mm; no. segments 133–146. Colour dark, brown-violet on dorsum, paler on ventrum. Clitellum 1 / 2 14, 15–24 saddle shaped. Tubercles small bands on 17–18. Muscular gizzard in 6, calciferous glands lamellar, three pairs in 7–9. Typhlosole lacking, 10–12 pairs of intestinal caeca encircle the intestine in 27. Commissures in 7–9 lateral, hearts in 10–11 oesophageal. Testes and funnels in 10, 11, spermathecae lacking.

External characters

Holotype. (Broken in two pieces.) L, 210 mm; D, 15 mm; no. segments 137.

Paratypes. L, 160–175 mm; D, 11–15 mm; no. segments 133–146. The body characteristically depressed and ventrally flat. Colour dark brown-violet on dorsum, paler on ventrum with whitish spots around cd on the clitellum. Prostomium withdrawn into the buccal cavity, proboscis not seen. Setae ab and cd from segment 3, closely paired, setal arrangement after the clitellum aa:ab:bc:cd:dd = 12:1.5:15:1:45. Setae (9), 10, 17, 18 ab modified to genital setae. Nephropores just below d with muscular sphincter embedded in the body-wall. Spermathecal pores lacking, female pores on the posterior side of 14 near of 14 / 15. Male pores on the tubercles in 17 / 18. Clitellum on 1 / 214, 15–24, tubercula pubertatis as yellowish bands on 17–18 ( Figure 2A View Figure 2 ). Genital tumescences surrounding setae a and b on 9, 10, 17, 18. Genital setae 1.5–1.6 mm long, 0.05 mm in diameter, spear shaped with four parallel lines of ornamentation consisting of 11–12 crescentic indentations in each line ( Figure 2B View Figure 2 ).

Notes: tb, tubercles.

Internal characters

Septa 6 / 7–12 / 13 membranous, 13 / 14, 15 / 16, 16 / 17 thickened, 14 / 15 highly strengthened. Crop highly folded, S-shaped in 4–5, strong muscular gizzard in 6. Three pairs of lamellar calciferous glands attached laterally to the oesophagus in 7–9. The glands large, paddle-shaped, containing 43–45 internal lamellae. Free end oriented dorsally and bears a whitish, undulated ribbon-shaped thickening ( Figure 2C View Figure 2 ). Intestine begins abruptly in 20, typhlosole lacking; 10–12 pairs of digitate caeca encircle the intestine in 27 with a larger dorsal interruption. Vascular system with a simple ventral trunk and a dorsal trunk, moniliform between 6–17. Three pairs of lateral commissures in 7–9 and two pairs of oesophageal hearts in 10, 11. Excretory system holoic with simple prae-septal nephrostoma and asymmetric biramous nephridial bladders open to the surface through muscular sphincter.

Ovaries and ovarian funnels not found. Two pairs of testes and funnels in 10, 11 enclosed in testis sacs. Vesicles small in 11, 12. Spermathecae lacking.

Remarks

The clitellum is clearly marked on all specimens, but it is not particularly glandular and may represent an earlier stage of maturity. The lack of spermathecae is not connected to this because these are missing in all known species of Nouraguesia , even those with a strongly glandular clitellum.

The new species is similar to Nouraguesia amaparis (Righi, 1971) , but clearly differs from it by the position of the clitellum and tubercles, the number of caeca and furthermore by the size of the genital setae.