Polyplectropus annulicornis

Chamorro, Maria Lourdes & Holzenthal, Ralph W., 2010, 2582, Zootaxa 2582, pp. 1-252 : 75-76

Key to males of P. annulicornis species group

1 Dorsal digitate lobe of mesoventral process of preanal appendage present; Dorsolateral process of preanal appendage present ( Fig. 22).................................................................. 2

- Dorsal digitate lobe of mesoventral process of preanal appendage absent; Dorsolateral process of preanal appendage absent ( Fig. 32)............................................. P. paysandu Angrisano , p. 68

2(1) Ventral branch of inferior appendage with dorsal projection, acutely pointed or not; dorsal peg-like setae absent] ( Fig. 29)................................................................................. 3

- Ventral branch of inferior appendage without dorsal projection; dorsal peg-like setae present or absent ( Figs. 22, 31)..................................................................................... 8

3(2) Endothecal phallic spines shorter than phallic sclerite ( Figs. 24, 29)................................... 4

- Endothecal phallic spines as long or longer then phallic sclerite ( Fig. 34)............................... 5

4(3) Ventral branch of inferior appendage apically acute and with dorsal projection produced basally; endothecal spines projecting laterad if endothecal membrane everted; dorsolateral arm of phallic sclerite rounded ( Figs. 29, 30)............................................................... P. matatlanticus , n. sp., p. 63

- Ventral branch of inferior appendage apically rounded and dorsal projection produced subapically; endothecal spines half as long as dorsal phallic sclerite; dorsolateral arm of phallic sclerite produced dorsad into acute point ( Fig. 24)............................................................ P. amazonicus , n. sp., p. 54

5(3) Ventral branch of inferior appendage apically rounded or truncate; phallic spine apically bearing setae; dorsolateral process of preanal appendage with or without lateral row of small spines ( Figs. 25, 26, 35)...... 6

- Ventral branch of inferior appendage apically acute; phallic spine apically bearing small spines; dorsolateral process of preanal appendage with lateral row of small spines ( Fig. 34)......................................................................................... P. profaupar Holzenthal & Almeida , p. 71

6(5) Ventral branch of inferior appendage about half as long as dorsal branch of inferior appendage; apex of endothecal phallic membrane directed ventrad; dorsolateral process of preanal appendage without lateral row of small spinules ( Figs. 25, 35)...................................................................... 7

- Ventral branch of inferior appendage almost as long as dorsal branch of inferior appendage; apex of endotheca phallic membrane directed dorsad; dorsolateral process of preanal appendage with lateral row of small spinules ( Fig. 26)................................................................ P. gaesum , n. sp., p. 58

7(6) Ventral branch of inferior appendage with apical projection and apex appearing truncate; mesoventral process of preanal appendage (including dorsal lobe) almost twice as long as ventral branch of inferior appendage ( Fig. 35)....................................................................... P. rodmani , n. sp., p. 73

- Ventral branch of inferior appendage with dorsomedial projection and apex of ventral branch rounded and produced posterad; mesoventral process of preanal appendage almost equal in length (including dorsal lobe) to ventral branch of inferior appendage ( Fig. 25)............................. P. annulicornis Ulmer , p. 50

8(2) Ventral branch of inferior appendage with dorsal peg-like setae; endothecal phallic spines elongate and basally fused, apices acute and directed posterad; phallic spines lanceolate-shaped when endotheca everts ( Figs. 27, 28) .......................................................................................... 9

- Ventral branch of inferior appendage without dorsal peg-like setae, instead with elongate, stout setae; endothecal phallic spines basally fused and apices acute and directed laterad, phallic spines having V-shape when endotheca everts ( Fig. 31)................................................... P. novafriburgensis , n. sp., p. 66

9(8) Endothecal phallic membrane with pair of long or short spines ( Figs. 22, 33), never with many peg-like spines …......................................................................................... 10

- Endothecal phallic membrane with many peg-like spines, pair of elongate rod-like, basally fused spines present or absent ( Figs. 27, 28).................................................... P. hystricosus , n. sp., p. 60

10(9) Endothecal phallic membrane with spines basally fused, elongate, sinuate, apically rounded; spines directed posterad when membrane everted ( Fig. 33)................................... P. pratherae , n. sp., p. 69

- Endothecal phallic membrane with spines basally not fused, short not sinuate, and apically acute; spines directed anterolaterad when membrane everts ( Fig. 22)............................... P. alatespinus , n. sp., p. 52