Bull. nat. Hist. Mus. Loncl. (Zool.) 65(2): 73-122 Issued 25 November 1999 



Systematics and phylogeny of Zausodes 

 C.B. Wilson, 1932 (Copepoda, Harpacticoida, 

 Harpacticidae), including three new species 

 from the northern Gulf of Mexico 



LORI BOUCK 



Department of Oceanography, Florida State University, Tallahassee, FL 32306^4320, USA 



DAVID THISTLE* 



Department of Oceanography, Florida State University, Tallahassee, FL 32306— 4320, USA 



RONY HUYS 



Department of Zoology, The Natural History Museum, Cromwell Road, London SW7 5BD 



H'- 1 ^rT 



3" NOV 1993 



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CONTENTS 



Introduction 74 



Materials and Methods 74 



Systematics 74 



Family Harpacticidae Dana, 1846 74 



Genus Zausodes C.B. Wilson, 1932 74 



Zausodes arenicolus C.B. Wilson, 1932 75 



Zausodes septimus Lang, 1965 81 



Genus Neozausodes gen. nov 8 1 



Neozausodes areolatus (Geddes, 1968a) comb, nov 84 



Neozausodes limigenus (Jakobi, 1954) comb, nov 89 



Neozausodes paranaguaensis (Jakobi, 1954) comb, nov 89 



Neozausodes stammeri (Jakobi, 1954) comb, nov 91 



Neozausodes sextus (Lang, 1965) comb, nov 91 



Neozausodes shulenbergeri sp. nov 91 



Genus Mucropedia gen. nov 96 



Mucropedia cookorum sp. nov 96 



Mucropedia kirstenae sp. nov 107 



Genus Archizausodes gen. nov 1 13 



Archizausodes biarticulatus (Ito, 1979) comb, nov 1 13 



Phylogeny 1 13 



Selection of outgroup 1 13 



Morphological characters 1 16 



Data matrix and analysis 1 19 



Results and discussion 119 



Status of Zausodes ductus Krishnaswamy, 1954 121 



Acknowledgements 122 



References 122 



SYNOPSIS. Re-examination of copepod material, collected from the northern Gulf of Mexico and previously identified as 

 Zausodes arenicolus C.B. Wilson, 1932 (Harpacticoida, Harpacticidae), resulted in the discovery of three new species of the 

 Zausodes complex. Phylogenetic analysis identified four distinct lineages within this complex which are attributed generic status. 

 Zausodes C.B. Wilson, 1932 is redefined to include only Z septimus Lang and the type species Z. arenicolus which is completely 

 redescribed. A new genus Mucropedia is proposed to accommodate two new species from the Gulf of Mexico, M. kirstenae and 

 M. cookorum. Z. biarticulatus Ito, 1979 from the Japanese Bonin Islands is transferred to Archizausodes gen. nov. and regarded 

 as the most primitive member of the Zausodes complex. All other species are grouped in Neozausodes gen. nov., including N. 

 shulenbergeri sp. nov. from the Gulf of Mexico and N. areolatus (Geddes, 1968a) comb. nov. which is completely redescribed 

 on the basis of type material. Z ductus Krishnaswamy, 1954 is ranked species incertae sedis in the family Harpacticidae. The 

 sister group relationship between Perissocope Brady, 1910 and the Zausodes complex is discussed. Lang's (1944, 1948) 

 subfamilial division of the Harpacticidae is abandoned. 



* Author for correspondence 



© The Natural History Museum, 1999 



