Vol. 57, 2018 (update: 2018.03.09; 03.26) On Argentodromas bellanella gen. nov., sp. nov. (Crustacea, Ostracoda) from a Stream in Northeastern Argentina (South America)Analia Díaz1,* and Koen Martens2 doi:10.6620/ZS.2018.57-10
1Instituto
de Limnología Dr. Raúl A. Ringuelet (CCT-La Plata CONICET), Boulevard
120 y 62, 1900 La Plata, Provincia de Buenos Aires, Argentina (Received 5 July 2017; Accepted 21 February
2018; Communicated by Ryuji Machida) Analia
Díaz and Koen Martens (2018) Argentodromas
bellanella
gen. nov., sp. nov. is here described from streams in the province of
Misiones, in northeastern Argentina. The new genus and species belong
to the family Notodromadidae. Most species in the family have
morphological adaptations to a hyponeustic mode of life: their
carapaces have lip-like protrusions of the valve margins near the mouth
and a flat plate-like expansion of the ventral part. The new genus can
be distinguished from other genera in the subfamily Notodromadinae
based on valve ornamentation (surface of valves covered with polygonal
elevations and many pores with setae), the ventral plate-like expansion
which is set with 3-4 rows of rounded elevations and bordered with an
elevated outer list, eye tubercles softly pronounced, and soft parts
features (male prehensile palps moderately asymmetrical and both with
elongated first segments, posterior seta of caudal ramus longer than
terminal claws and anterior seta present, hemipenis with rounded outer
lobe and small rounded inner lobe). For comparative purposes, valves
and carapaces of species in three other Notodromadinae genera (Newnhamia, Kennethia, Notodromas) are also illustrated
and re-diagnosed. Key words: Notodromadidae, New genus,
Morphology, Argentina, Hyponeustic. *Correspondence: E-mail: analiadiaz@ilpla.edu.ar;
rcampos@ilpla.edu.ar |