Podaena kuscheli Ordish, 1984

Delgado, Juan A. & Palma, Ricardo L., 2010, A revision of the genus Podaena Ordish (Insecta: Coleoptera: Hydraenidae), Zootaxa 2678 (1), pp. 1-47 : 21-24

Podaena kuscheli Ordish, 1984

( Figs 21, 22 , 31, 35 , 54 , 81, 82 , 87 , 98 , 101)

Podaena kuscheli Ordish, 1984: 15 , figs 9, 10, 28, 55, 82, 111.

Differential diagnosis. Male ( Fig. 101) body length (taken from anterior margin of labrum to elytral apex) 1.90 mm; female body length 1.98 mm. Externally similar to P. dentipalpis , P. obscura , P. trochanteralis , P. latipalpis , P. hauturu and P. moanaiti , but distinguished from all these species by its less modified male palps with a much reduced chaetotaxy, and the last two distal palpomeres without ventral grooves ( Figs 21–22 ). Among the species with less or not modified male palps, P. kuscheli can be clearly separated from P. maclellani , P. mariae and P. glabriventris by the male foretibiae (compare Figs 31, 35 with Figs 25–30 ), and from P. aotea by the chaetotaxy and length of the male palps, and by the male foretibiae, especially by the position of tibial spines 1 and 2 (compare Figs 31, 35 with Figs 39, 43 respectively).

The male foretibiae of P. kuscheli have a conspicuous tibial spine 2, placed in the most distal position among all species, hence it is widely separated from tibial spine 1 ( Figs 31, 35 ). Metaventrite with a glabrous central area as in Fig. 47 , and terminalia similar to those of close species ( Figs 54 , 65, 68 ). Male genitalia ( Figs 81−82 ) with the proximal half of the main piece cylindrical, and a distal half progressively flattened, foliaceous, and very unsclerotized, almost colourless. Distal lobe equally colourless and hardly distinguishable from the main piece, with an evertable flagellum, but variable morphology, not useful for species identification. Spermatheca ( Fig. 87 ) with a sinuous tapering central piece, ending in a long thin distal duct.

Note. Since P. kuscheli is not known from the Nelson area ( NN), the male genitalia figured by Ordish (1984: 49, fig. 82) is incorrectly labelled as from “ Flora Creek ”, a locality situated in the Nelson area .

Distribution. As in Fig. 98 . Restricted to the west coast of the South Island.

Material examined. Type material. Holotype: South Island : Westland ( WD): Male – “Hercules Ck., Mt. / Hercules WD / 30 Mar. 73 / G. Kuschel ”.

Paratypes: South Island : Westland ( WD) : 8 males 1 female (4 males en alcohol, 4 males dry-mounted: printed labels, 1 female in alcohol) ( NZAC) : “ 8 km S. of / L. Paringa / 29 Mar 1973 / G.K. + J.McB.” . 14 males, 10 females (10 males in alcohol, 4 males dry-mounted, 9 female in alcohol, 1 female dry-mounted) ( NZAC) : “Hercules CK / Mt Hercules , WD / 30 Mar 73, G.K.”, “see slide” [2 slides in MONZ] . 1 male, 1 female (1 male in alcohol, 1 female dry mounted: printed label) ( MONZ) : “ Mt Hercules Cr. / WD. 30 Mar 73 / G. Kuschel ” . 1 male, 1 female (dry-mounted: partially printed) ( MONZ) : “ Mt Hercules Cr. / WD. 30 Mar 73 / G. Kuschel NZ” . 10 males, 11 females (7 males in alcohol, 3 males dry-mounted: printed labels, 7 females in alcohol, 4 females dry-mounted: printed labels) ( MONZ) : “Hercules CK., Mt / Hercules. WD. / 30 Mar. 1973 / G. Kuschel ” . 1 male (dry-mounted) ( MONZ) : “Hercules Ck. / Mt. Hercules WD. / 30.3.73 G.K.” .

Additional material examined. South Island : Westland ( WD) : 2 males, 2 females (in alcohol) ( NZAC): “Hercules CK / Mt Hercules, WD / 30 Mar 73, G.K.” [surplus to the number of paratypes listed by Ordish 1984: 15. See Table 1] . 1 female (dry mounted: printed label) ( NZAC): “ 8 km S. of / L. Paringa / 29.3.1973 / G.K. + J.McB.” . 3 males, 2 females (dry mounted: printed labels) ( SMDG, CDMS): “New Zealand WD. Chelsea , Creek. Serpentine Creek, 15 km east of Haast. 200m, Leg. Jäger & Nunn 20.01.08” . 2 males, 7 females (dry mounted: printed labels) ( CDMS): “ Rata Creek at Bridge 695/9.60 / Near Paringa Lake / NEW ZEALAND / 5−12−96 (10− Sur) / Podocarpus forest / J.A. Delgado leg” .

Figures

FIGURES 1−24. Male right maxillary palps in ventral and lateroventral views. 1, P. aotea (ventral view). 2, P. aotea (lateroventral view). 3, P. moanaiti (ventral view). 4, P. moanaiti (lateroventral view). 5, P. hauturu (ventral view). 6, P. hauturu (lateroventral view). 7, P. latipalpis (ventral view, Karori). 8, P. latipalpis (lateroventral view, Karori). 9, P. latipalpis (ventral view, Mangamuka Gorge). 10, P. latipalpis (lateroventral view, Mangamuka Gorge). 11, P. obscura (ventral view, Rahu Creek). 12, P. obscura (lateroventral view, Rahu Creek). 13, P. obscura (ventral view, Karamea Bluff). 14, P. obscura (lateroventral view, Karamea Bluff). 15, P. dentipalpis (ventral view, Maitai Valley). 16, P. dentipalpis (lateroventral view, Maitai Valley). 17, P. trochanteralis (ventral view, Rahu Creek). 18, P. trochanteralis (lateroventral view, Rahu Creek). 19, P. mariae (ventral view, stream near Fox Glacier). 20, P. mariae (lateroventral view, stream near Fox Glacier). 21, P. kuscheli (ventral view, Hercules Creek). 22, P. kuscheli (lateroventral view, Hercules Creek). 23, P. maclellani (lateroventral view, Maitai valley). 24, P. glabriventris (lateroventral view, Maungakotukutuku). Scale = 0.2 mm.

FIGURES 31−38. Male left foretibiae. 31, P. kuscheli (anterior view, Hercules Creek). 32, P. trochanteralis (anterior view, Lake Paringa). 33, P. obscura (anterior view, Rahu Saddle). 34, P. dentipalpis (anterior view, Wharfedale). 35, P. kuscheli (lateral view, Hercules Creek). 36, P. trochanteralis (lateral view, Lake Paringa). 37, P. obscura (lateral view, Rahu Saddle). 38, P. dentipalpis (lateral view, Wharfedale). Scale = 0.1 mm.

FIGURES 52−60. Last abdominal male tergites: 52−55. 52, P. glabriventris (Maungakotukutuku). 53, P. maclellani (Shakespeare Bay). 54, P. kuscheli (Mount Hercules). 55, P. mariae (stream near Fox Glacier). Male ventrite 7 and spiculum: 56−60. 56, P. glabriventris. 57, P. latipalpis (Waiomio Cave). 58, P. maclellani (Rata Creek). 59, P.mariae (stream near Fox Glacier). 60, P. trochanteralis (Lewis Pass). Scale = 0.1 mm.

FIGURES 79−82. Male genitalia. 79, P. dentipalpis (lateral view, Waikawa). 80, P. dentipalpis (ventral view, Waikawa). 81, P. kuscheli (lateral view, Rata Creek). 82, P. kuscheli (ventral view, Rata Creek). Scale = 0.1 mm.

FIGURES 83−94. Spermathecae: 83̅92. 83, P. glabriventris (ventral view, Tuamarina). 84, P. glabriventris (right lateral view, Tuamarina). 85, P. maclellani (ventral view, Ship Cove). 86, P. maclellani (right lateral view, Ship Cove). 87, P. kuscheli (ventral view, Hercules Creek). 88, P. dentipalpis (ventral view, Serpentine Creek). 89, P. dentipalpis (right lateral view, Serpentine Creek). 90 P. trochanteralis (ventral view, Altimarloch). 91, P. trochanteralis (right lateral view, Altimarloch). 92, P. obscura (ventral view, Flora Hutt). Distal outline of elytra: 93–94. 93, P. obscura (Gorge Creek). 94, P. moanaiti. Scales = 0.1 mm.

FIGURES 95−98. Distribution maps for all species of Podaena. New Zealand is subdivided in areas as proposed by Crosby et al. (1976, 1998).

FIGURES 25−30. Male left foretibiae. 25, P. maclellani (anterior view, Dodson’s Valley). 26, P. maclellani (lateral view, Dodson’s Valley). 27, P. mariae (anterior view, stream near Fox Glacier). 28, P. mariae (lateral view, stream near Fox Glacier). 29, P. glabriventris (anterior view, Maungakotukutuku). 30, P. glabriventris (lateral view, Maungakotukutuku). Scale = 0.1 mm.

FIGURES 39−46. Male left foretibiae. 39, P. aotea (anterior view). 40, P. hauturu (anterior view). 41, P. moanaiti (anterior view). 42, P. latipalpis (anterior view, Waitomo). 43, P.aotea(lateral view). 44, P. hauturu (lateral view). 45, P. moanaiti (lateral view). 46, P. latipalpis (lateral view, Waitomo). Scale = 0.1 mm.

FIGURES 47−51. Metaventrites. 47, P. obscura (Rahu Creek). 48, P. glabriventris (Tuamarina). 49, P.mariae (stream near Fox Glacier). 50, P. maclellani (Dodson’s Valley). 51, P. trochanteralis (Lake Paringa). Scale = 0.1 mm.

FIGURES 61−68. 61, female valvifers, gonocoxite and last two abdominal tergites of P. maclellani (Ship Cove). 63, ditto of P. trochanteralis (Altimarloch). 62, last female tergite of P. maclellani (Ship Cove). 65, ditto of P.obscura (Flora Hutt). 66, ditto of P. glabriventris (Tuamarina). 64, gonocoxite of P. maclellani (Ship Cove). 67, ditto of P. glabriventris (Tuamarina). 68, ditto of P.obscura (Flora Hutt). Scale = 0.1 mm.