Podaena hauturu Delgado and Palma, 2010

Delgado, Juan A. & Palma, Ricardo L., 2010, A revision of the genus Podaena Ordish (Insecta: Coleoptera: Hydraenidae), Zootaxa 2678 (1), pp. 1-47 : 37-39

publication ID

https://doi.org/ 10.11646/zootaxa.2678.1.1

publication LSID

lsid:zoobank.org:pub:FB43BE83-EBB8-4D58-85CF-CBE73DD683FE

DOI

https://doi.org/10.5281/zenodo.5310490

persistent identifier

https://treatment.plazi.org/id/458E6E52-0E20-44CC-AC7F-E499CCB2524C

taxon LSID

lsid:zoobank.org:act:458E6E52-0E20-44CC-AC7F-E499CCB2524C

treatment provided by

Felipe

scientific name

Podaena hauturu Delgado and Palma
status

sp. nov.

Podaena hauturu Delgado and Palma View in CoL , new species

( Figs 5, 6 View FIGURES 1−24 , 40, 44 View FIGURES 39−46 , 96 View FIGURES 95−98 , 107 View FIGURE 107 )

Description. Male as in Fig. 107 View FIGURE 107 .

Body: length (taken from anterior margin of labrum to elytral apex) 2.00 mm. Colour: head, pronotum and elytra dark brown; elytra with lighter proximal third and shoulders; legs and maxillary palps dark brown, similar to the body.

Head: prognathous, not retracted under the prothorax; evenly convex dorsally, smooth and glabrous, with sparse but distinct punctures; frons slightly convex, with well marked, narrow paraocular areas; eyes moderately protruding; labrum wider than long, bilobed and with a U-shaped median incision; maxillary palps long and modified ( Figs 5−6 View FIGURES 1−24 ), with the two distal palpomeres together longer than the second, and the penultimate well grooved, subtriangular on the lateroventral view.

Thorax: Pronotum uniformly convex with inconspicuous lateral depressions, and with a subtle transverse posterior depression; surface smooth, moderately dense but clearly punctuated. Legs: relatively long and with very long middle and hind tarsi; foretibiae curved inwards in their distal third, with a shallow invagination and a long narrow distal end on lateral view ( Fig. 44 View FIGURES 39−46 ); on the anterior view ( Fig. 40 View FIGURES 39−46 ), the distal end associated with rows of setae is well expanded with an irregular edge. Metaventrite (as in Fig. 47 View FIGURES 47−51 ) with a flat, cordiform glabrous area on the disc, with a central, oval and shallow concavity. Elytra with a smooth lateral rim in the anterior part but slightly serrate distally (as in Fig. 94 View FIGURES 83−94 ).

Abdomen: Ventrite 7 and spiculum as in Fig. 57 View FIGURES 52−60 , firmly attached. Ventrite 7 oval, distally emarginated; spiculum moderately long. Male genitalia as in Figs 75−76 View FIGURES 75−78 , 79−80 View FIGURES 79−82 ; main piece cylindrical and well sclerotized in its proximal half, flattened and laminar in the distal half; uniformly curved on lateral view (as in Figs 75 View FIGURES 75−78 , 79 View FIGURES 79−82 ); distal lobe of variable shape and indistinguishable from the distal part of the main piece; parameres wide and unsclerotized distally, very curved proximally, and weakly inserted to the phallobase, becoming easily dislodged when manipulated.

Female. Body: Similar to the male in shape; length (taken from anterior margin of labrum to elytral apex) 2.00 mm. Without modified maxillary palps and foretibiae.

Abdomen: Last tergite as in Fig. 65 View FIGURES 61−68 ; gonocoxite as in Fig. 68 View FIGURES 61−68 ; spermatheca as in Figs 87−92 View FIGURES 83−94 with the proximal lighter area of the central piece about a fourth of its total length (as in Figs 89, 91 View FIGURES 83−94 ), and the central piece variably curved in different specimens (as in Figs 87−88, 90, 92 View FIGURES 83−94 ).

Differential diagnosis. The long and modified male maxillary palps ( Figs 5−6 View FIGURES 1−24 ) clearly separate P. hauturu from P. aotea , P. glabriventris , P. maclellani , P. kuscheli and P. mariae . The male foretibiae ( Figs 40, 44 View FIGURES 39−46 ) further separate P. hauturu from P. glabriventris , P. maclellani and P. mariae , while the distance between tibial spines 1 and 2 further separate P. hauturu from P. kuscheli ( Figs 35 View FIGURES 31−38 , 44 View FIGURES 39−46 ). The modified male maxillary palps of P. hauturu ( Figs 5−6 View FIGURES 1−24 ) are sufficiently diagnostic to distinguish it from P. dentipalpis , P. obscura and P. trochanteralis ( Figs 11−18 View FIGURES 1−24 ), but the shape and chaetotaxy of the male foretibiae, especially on the anterior view, are even more diagnostic (compare Figs 32−34 View FIGURES 31−38 with Fig. 40 View FIGURES 39−46 ).

Podaena hauturu is the largest species of the P. latipalpis complex. The male maxillary palps ( Figs 5−6 View FIGURES 1−24 ) easily separate P. hauturu from P. aotea ( Figs 1−2 View FIGURES 1−24 ) and P. moanaiti ( Figs 3−4 View FIGURES 1−24 ). Although the male palps of P. hauturu are similar to those of P. latipalpis ( Figs 7−10 View FIGURES 1−24 ), the third (penultimate) and fourth (distal) palpomeres are clearly longer in P. hauturu , making the whole palp longer and narrower than in P. latipalpis . Additional characters to distinguish P. hauturu from P. latipalpis are the shape and chaetotaxy of the male foretibiae, especially in the distal half, best seen on the anterior view ( Figs 40, 42 View FIGURES 39−46 ).

Etymology. The species epithet hauturu is the name given to Little Barrier Island by Maori people, and also the type locality of this species. It is to be treated as a noun in apposition.

Type locality. Little Barrier Island, CL, North Island, New Zealand.

Distribution. As in Fig. 96 View FIGURES 95−98 . Endemic to Little Barrier Island.

Material examined. Holotype: North Island : Coromandel (CL): Male (dry-mounted) ( NZAC): “Awaroa CK, Little Barrier / I. in litter, downstream / end of pool 90 m. / 9 March 74 J.S. Dugdale ”.

Paratypes: North Island : Coromandel (CL): 1 male, 4 females (1 male dry-mounted: printed label, 2 females dry-mounted: printed labels, 2 females in alcohol) ( NZAC): “Awaroa CK, Little Barrier / I. in litter, downstream / end of pool 90 m. / 9 March 74 J.S. Dugdale ”. 1 male, 1 female (dry-mounted: printed labels) ( MONZ): “Awaroa CK, Little Barrier / I. in litter, downstream / end of pool 90 m. / 9 March 74 J.S. Dugdale ” .

NZAC

New Zealand Arthropod Collection

MONZ

Museum of New Zealand Te Papa Tongarewa - Entomology

Kingdom

Animalia

Phylum

Arthropoda

Class

Insecta

Order

Coleoptera

Family

Hydraenidae

Genus

Podaena

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