Hydraena christinae Audisio, De Biase & Jäch 1996

Trizzino, Marco, Carnevali, Lucilla, Felici, Stefano De & Audisio, Paolo, 2013, <strong> A revision of <em> Hydraena </ em> species of the “ <em> Haenydra </ em> ” lineage (Coleoptera, Hydraenidae) </ strong>, Zootaxa 3607 (1), pp. 1-173 : 62-63

55. Hydraena christinae Audisio, De Biase & Jäch 1996

Hydraena (Haenydra) excisa ssp. exclusa d’Orchymont 1931: 30 (partim); Audisio, De Biase & Jäch 1996: 66;

Hydraena sp. cfr. excisa Audisio & De Biase 1990: 385 ;

Hydraena (Haenydra) christinae Audisio, De Biase & Jäch 1996: 66 .

Male genitalia: Fig. 32g ; female elytral apex: Fig. 32q ; geographic range: Fig. 33 . Type locality: Greece, Peloponnesus, Patras province, Erimanthos Mts., Kato Vlassia , Ahaia , 1000 m a.s.l.

(“ Greece, Peloponnesus, Ahaia [Patras] prov., Erimanthos Mts, Kato Vlassia, 1000 m ”: Audisio et al. 1996). Primary types: Holotype at MZUR. Measurements: Length: 2.6 – 2.8 mm. EL/EW = 1.68; PW/PL = 1.36; PW/EW = 0.79. Diagnosis: Male habitus almost identical to H. akbesiana ( Fig. 32a ) and allies. Taxonomic position and diagnostic characters: See differential diagnosis of H. akbesiana . Habitat: This species usually lives under stones in cold fastflowing streams between 600 and 1200 m a.s.l.

HER: eu37. Chorotype: PELO (Peloponnesian Endemic). Distribution: EUR: GR-Peloponnesus ( Fig. 33 ).

H. christinae is endemic to Peloponnesus (see Appendix 2 for all the detailed known localities). DNA data: For this species, mtDNA data (COI, 16S rDNA, tRNA leu and NAD1) are available in GenBank

( Trizzino et al. 2011b; Ribera et al. 2011).

56. Hydraena exasperata d’Orchymont 1935

Hydraena (Haenydra) exasperata d’Orchymont 1935: 1 .

Male genitalia: Fig. 32h ; female elytral apex: Fig. 32r ; geographic range: Fig. 33 .

Type locality: Portugal, Algarve, Faro district, Monchique (“ Portugal: Monchique ”: d’Orchymont 1935) .

Primary types: Holotype at ISNB.

Measurements: Length: 2.4 – 2.6 mm. EL/EW = 1.68; PW/PL = 1.36; PW/EW = 0.79.

Diagnosis: Male habitus almost identical to H. akbesiana ( Fig. 32a ) and allies.

Taxonomic position and diagnostic characters: See differential diagnosis of H. akbesiana .

Habitat: This species usually lives under stones in cold fastflowing streams between 20 and 1500 m a.s.l. HER: Heterotopic species.

Chorotype: IBER (Iberian Endemic).

Distribution: EUR: PT, SP ( Fig. 33 ).

H. exasperata is widely distributed in the Iberian Peninsula, including Portugal (See Appendix 2 for all the detailed known localities).

DNA data: For this species, mtDNA (COI, 16S rDNA, tRNA leu and NAD1) and nuclear DNA (18S rDNA, 28S rDNA) data are available in GenBank ( Trizzino et al. 2011b; Ribera et al. 2011).

57. Hydraena tyrrhena Binaghi 1961

Hydraena (Haenydra) monticola auct.: Ganglbauer 1901: 328 (partim), nec Rey 1885: 30; Pretner 1931a: 79;

Hydraena (Haenydra) evanescens ssp. tyrrhena Binaghi 1961: 76 ;

Haenydra tyrrhena ; Audisio & De Biase 1995: 168.

Male habitus: Fig. 34a ; male genitalia: Fig. 34c ; female elytral apex: Fig. 34f ; geographic range: Fig. 35 .

Type locality: Italy, Sardinia, Nuoro province, Gennargentu Mts., Aritzo , 800 m a.s.l. (“ Fonni, M. te. Gennargentu, Aritzo”: Binaghi 1961) .

Primary types: Holotype / Lectotype not yet formally designated. Type series in MSNG .

Measurements: Length: 1.9 – 2.1 mm. EL/EW = 1.87; PW/PL = 1.40; PW/EW = 0.82.

Diagnosis: Body orange to reddish brown. Palps and legs pale reddish brown. Labrum with V-shaped notch on anterior margin. Fronto-clypeal suture almost straight. Middle of frons moderately densely punctate. Pronotum sub - hexagonal, with lateral margin denticulate. Anterior angle slightly obtuse, lateral margin moderately produced at middle, strongly convergent at anterior angle, sinuately convergent at posterior angle. Pronotal disc convex, rather densely punctate near anterior and posterior margin, along midline and at posterior foveae.

Elytra elongate, convex, slightly and regularly arcuate at sides, apically produced and only very weakly declivitous; moderately declivitous laterally. Explanate margin relatively narrow and long, not reaching apex. Elytral apex slightly acuminate in male, moderately sinuate in female ( Figs. 34a,f ). Male protibiae not dilated. Male metatibiae with a fringe of long setae along mesal face of distal half.

Taxonomic position and diagnostic characters: Distinct from its closest allies H. evanescens and H. rosannae by the differently shaped aedeagus, characterized (in lateral view) by dorsal outline of main piece with a deep and narrow U-shaped emargination at distal third ( Fig. 34c ). Molecular data shows a sister-group relationship between the H. evanescens and H. decolor complexes ( Trizzino et al. 2011b).

Habitat: This species usually lives under stones in fastflowing streams with granodioritic substrates, between 400 and 1500 m a.s.l. HER: eu32.

Chorotype: SARD (Sardinian Endemic).

Distribution: EUR: IT - SAR ( Fig. 35 ).

H. tyrrhena is endemic to N and Central Sardinia (see Appendix 2 for all the detailed known localities).

DNA data: For this species, mtDNA data (COI, 16S rDNA, tRNA leu and NAD1) are available in GenBank ( Trizzino et al. 2011b).

Figures

FIGURES 32 a–r. Male habitus in dorsal view of: H. akbesiana (Turkey, Adana, Yarpuz) (a). Aedeagi in right side view of: H. excisa (Austria, Donnerskirchen) (b); H. akbesiana (From Audisio et al. 1993: Turkey, Adana, Yarpuz) (c); H. integra (From Audisio et al. 1996: Turkey, Artvin, Borçka) (d); H. cata (From Audisio et al. 1996: Turkey, Çanakkale) (e); H. phallica (From Audisio et al. 1996: Greece, Etolia, Pentakorfos) (f); H. christinae (From Audisio et al. 1996: Greece, Peloponnesus, Kato Vlasia) (g); H. exasperata (Spain, Castilla, Alcaraz) (h). Female elytral terminations of: H. excisa (Rumania, Ilba) (l); H. integra (Turkey, Istanbul, NE Teke) (m); H. akbesiana (Complete Female habitus: Turkey, Adana, Çatak) (n); H. cata (Turkey, Mugla, Kale) (o); H. phallica (Greece, Evritania, Karpenissi) (p); H. christinae (Greece, Peloponnesus, Kato Vlasia) (q); H. exasperata (Spain, Leon, Pedrosa del Rey) (r). Scale bar = 1 mm (Figs. 32a,n); = 0.25 mm (Figs. 32b–h). Female elytral terminations not scaled.

FIGURE 33. Geographic distribution of: H. excisa; H. akbesiana; H. integra; H. cata; H. phallica; H. christinae; H. exasperata.

FIGURES 34 a–h. Male habitus in dorsal view of: H. tyrrhena (Sardinia, Desulo, Aratu river) (a); H. rosannae (Sardinia, Villacidro, Cannisoni river) (b). Aedeagi in right side view of: H. tyrrhena (Sardinia, Desulo, Aratu river) (c); H. rosannae (From Audisio et al. 2009: Sardinia, Villacidro, Cannisoni river) (d); H. evanescens (Corsica, Vizzavona) (e). Female elytral terminations of: H. tyrrhena (Sardinia, Desulo, Aratu river) (f); H. rosannae (Sardinia, Villacidro, Cannisoni river) (g); H. evanescens (Corsica, Golo river) (h). Scale bar = 1 mm (Fig. 34a–b); = 0.25 mm (Figs. 34c–e). Female elytral terminations not scaled.

FIGURE 35. Geographic distribution of: H. tyrrhena; H. rosannae; H. evanescens.