Matskási István (szerk.): A Magyar Természettudományi Múzeum évkönyve 94. (Budapest 2002)

Czuzdi, Cs. ; Szlávecz, K.: Diplocardia patuxentis sp. n., a new earthworm species from Maryland, North America (Oligochaeta: Acanthodrilidae)

vessél single throughout last hearts in 12. Male sexual system holoandric, with testes in 10 and 11, enclosed in perioesophageale testis sac. Seminal vesicles in 9, 12. Male ducts separate, run in close proximity until segment 20. Prostates small each confined into own segment and accompanied by a penial setal sac. Penial setae 0.5 mm in length and 0.01 mm wide, somewhat bowed with irregular tip and serrated ornamentation (Fig. 3). Ovaries and funnels in 13, free. Spermathecae in 8 and 9, with pear-shaped ampulla and a small duct. Diverticulum multilocular with numerous chambers, attached to ental part of the duct (Fig. 4). Material examined- Holotype: AF/5047 On the bank of a streamlet from clayey soil, Jug Bay Wetlands Sanctuary, Anne Arundel County, MD, USA. 04. 27. 2001. Leg. Cs. Csuzdi and K. Szlávecz. Paratypes: AF/5048 13 ex. and J.H.-Olig. 2001.04.1-4. 4 ex. Locality same as that of the holotype. Remarks - The new species seems to be close to D. verrucosa UDE, 1895 but differs from it in the ring-shaped clitellum, in the shape and position of genital markings (see MURCHIE 1962 p. 189, Fig, 2) and in the presence of copulatory setae. Diplocardia patuxentis sp. n. might be identical with Diplocardia sp. V. of GATES (1977) found in Beltsville, MD, and has not been described because only a fragmented and badly preserved specimen was present. Etymology - The new species is named after Patuxent river, the largest river that occurs entirely within the state of Maryland. Jug Bay Wetland Sanctuary is adjacent to the river at the midpoint of the watershed. The Beltsville locality mentioned in GATES (1977) is also part of the Patuxent watershed. Diplocardia texensis SMITH, 1924 (Figs 5-6) Diplocardia keyesi var. texensis SMITH, 1924: 2. Diplocardia texensis: GATES 1977: 26. Diplocardia texensis: JAMES 1990: 384. Diagnosis - Length 60-78 mm, diameter 3-3.5 mm. Pigmentation lacking. Prostomium epilobous, first dorsal pore in the intersegmental furrow 11/12. Clitellum almost annular, on segments 14-19(20) (Fig. 5). Female pores in 14 presetal. Prostate pores on 20, 22 in setal line b. male pores on 20, in seminal grooves. Penial and copulatory setae lacking. Unpaired genital markings on 14. Spermathecal pores at the leading edges of segments 8 and 9. Muscular gizzards united in 5-6. Testes paired in 10,11 enclosed in perioesophageale testis sac. Seminal vesicles in 9,12. Last hearts in 12. Dorsal blood vessel single throughout. Calciferous glands lacking. Intestinal origin at 18/19. Typhlosole present as a low undulated ridge. Prostates long, coiled, encircle the intestine, reaching 4-5 segments