14 



and other features is divided into three groups, which were first separated 

 by BovalUus and later, with some modification or the other, accepted by 

 22 all authors — first as subtribes and then as superfamilies. Pirlot's subtribe, 

 Hyperiidea Recticornia (or superfamily Vibilioidea according to Bowman 

 and Gruner, 1973): Antennae I of males (few-segmented) originate from 

 the anterior part of the head. Antennae II are short and originate from the 

 lower surface of the head; pereopods V are simple. The following fami- 

 lies are included under this superfamily: Cystisomatidae, Vibiliidae, and 

 Paraphronimidae. The family Cystisomatidae is closer to the infraorder 

 Physosomata since it has larvae of the "physosoma" type. At the same 

 time, in structure of the eyes and presence of a strong dental process on 

 the mandibles, it may belong to the infraorder Physocephalata. 



Family Paraphronimidae — highly specialized forms with indistinct 

 phyletic links: the outer and inner lobes of the maxillipeds are fused into 

 a single plate, which distinguishes these forms from all the remaining 

 hyperiideans. However, in some characters they are close to the family 

 Dairellidae of the superfamily Phronimoidea. 



Pirlot's subtribe Hyperiidea Filicornia (or superfamily Phronimoidea 

 according to Bowman and Gruner, 1973): antennae I and II originate 

 frqm the anterior surface of the head; in males antennae II are multi- 

 segmented through flagelliform in at least the distal part; pereopods V 

 may have a subchela. The subtribe includes four families: Dairellidae, 

 Phronimidae, Phrosinidae, and Hyperiidae. 



The characteristics of these families are given below. Their phyletic 

 links are not clear and possibly the inclusion of these four families in 

 one group is rather artificial and does not highlight the actually close 

 phylogenetic links between them. 



Pirlot's subtribe Hyperiidea Curvicomia or the superfamily 

 Platysceloidea of our classification: antennae I and II attached to 

 the lower surface of the head; in males the proximal article of 

 the flagellum of antennae I is broad, bent, and the flagellum few- 

 segmented; pereopods VII are reduced in size and often in number 

 of segments. The superfamily Platysceloidea combines eight families: 

 Lycaeidae, Tryphanidae, Brachyscelidae, Pronoidae, Anapronoidae, 

 Platyscelidae, Parascelidae, and Oxycephalidae. The least specialized 

 is the family Lycaeidae, from which arise four lines of development: 

 the first comprises the family Brachyscelidae; the second — families 

 Pronoidae and Anapronoidae; the third — family Platyscelidae, and the 

 fourth — family Oxycephalidae. The unique family Tryphanidae is closer 

 to the Lycaeidae. 



Following Bowman and Gruner, we specially examined the super- 

 family Lycaeopsoidea. It is characterized by an unusual structure of 

 antennae I of males, which originate from the anterior surface of the 



