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)

paired setal arrangement at the middle of the body: aa:ab:bc:cd=5:l:4:1.5. Clitellum annular, on segments 13-17, 1/2 18. Female pores presetal on 14, slightly medial to setae a. Prostate pores on 18, 20, male pores on 19 in seminal grooves. Penial setae present. Setae on 9 with nodulus but slightly modified. Tips with dense serrated ornamentation. Paired genital markings on 17 and sometimes on 21 ab. Spermathecal pores on minute protuberances in 6/7, 7/8, 8/9. Muscular gizzards in 5-6. Testes paired in 10, 11, seminal vesicles in 9, 12. Last hearts in 12. Dorsal blood vessel single throughout. Calciferous glands lacking but low inner folds in 13-15. Intestinal origin at 17. Typhlosole present as a low undulated ridge. Prostates normal, occupying 1-2 segments. Spermathecae simple with longer ampulla and shorter duct. An unstalked diverticulum attached to the ental part of the duct. Material examined- AF/4068 1 ex. Smithsonian Environmental Research Center, Edgewater, MD, USA, mixed deciduous forest edge. 07. 21. 1999. Leg. K. Szlávecz. AF/5052 30 ex., J.H.-Olig. 2001.04.9-16. Smithsonian Environmental Research Center, Edgewater, MD, USA. 06. 12. 1999. Leg. K. Szlávecz. AF/5053 1 ex. Smithsonian Environmental Research Center, Edgewater, MD, USA, forest edge at Beaver Pond. 04. 28. 2001. Leg. Cs. Csuzdi and K. Szlávecz. AF/5054 2 ex. Smithsonian Environmental Research Center, Edgewater, MD, USA, mixed deciduous forests. 04. 28. 2001. Leg. Cs. Csuzdi and K. Szlávecz. AF/5055 18 ex, J.H.-Olig. 2001.04.17-20. 4 ex., mixed deciduous forest in Cross Keys, Baltimore, MD, USA. 04. 24. 2001. Leg. Cs. Csuzdi and K. Szlávecz. Remarks - REYNOLDS (1974) reported D. singularis complex from Maryland, but due to the taxonomic difficulties of this species group he did not give more data. The differences between D. singularis and D. caroliniana are thought to be the presence of pigmentation at the former species (GATES 1977) furthermore the presence of modified setae in the region of spermathecal pores, and the more closely paired setae at the latter one (JAMES 1990). Our specimens show similarity with D. caroliniana having closely paired setae and no pigmentation, but the spermathecal setae are only slightly modified. Acknowledgements - This study was supported by the National Science Foundation (Int. Suppl. to DEB-97-14835) and the Hungarian Scientific Research Fund (MTA 049 - OTKA T-31623). We are very grateful to CHRIS SWARTH, Director of Jug Bay Wetlands Sanctuary, and ANSON HlNES, Assistant Director of the Smithsonian Environmental Research Center, for permitting to sample on these sites.