Archaeoptilomera kodadai, Zettel, 2009

Zettel, H., 2009, Three new genera of Ptilomerinae (Hemiptera: Heteroptera: Gerridae) from Southeast Asia, Zootaxa 2046 (1), pp. 26-42 : 40-41

Archaeoptilomera kodadai sp. n.

( Figs. 26 , 30, 32, 34 )

Holotype (apterous female). " SARAWAK (Borneo),\ ca. 40 km SE Kapit,\ 3. 1994, leg. J. Kodada ", "Rumah Ugap Ng\ marating bena Kapit \ Sut" (Natural History Museum Vienna).

Description of apterous female. Genus characteristics are not repeated here.

Dimensions. Body length 8.5 mm. Maximum body width at mesoacetabula 2.7 mm. Head width 1.40 mm. Length of second antennomere 0.92 mm. Length of mesofemur 10.8 mm.

Colour. Pronotum without lateral stripes. Metanotum without black mark near spiracle. Acetabula with small black marks distally; metacetabulum without black mark at base.

Structural characteristics. Minimum distance of eyes 0.23 times head width. Relative lengths of antennomeres: 3.6: 1 (= 0.92 mm); antennomeres 3 and 4 broken off. Pronotum width 1.75 times median pronotum length. Lengths of leg segments relative to mesofemur: profemur 38, protibia 33, protarsus 9+6, mesofemur 100 (= 10.8 mm), mesotibia 57, mesotarsus missing, metafemur 99, metatibia 44, metatarsus 2. Profemur slender, length 9.0 times maximum width near base. Metafemur hardly shorter than metafemur (0.99 times). Measured dorsally along midline, abdomen 1.15 times as long as thorax. Apex of abdomen comparatively low ( Fig. 30 ). All tergites distinctly wider than long; tergite 1 convex and matt; tergite 7 larger than others, medially 1.5 times as long as tergite 6. Connexival spines ( Figs. 30, 32 ) short, reaching midlength of large tergite 8. Proctiger relatively small, elongate, with almost truncate hind margin. Gonocoxae plate-shaped ( Fig. 30 ) without posterior bend, medial parts slightly curved dorsad. Medial lobe of sternite 7 comparatively short ( Fig. 34 ), its ventral outline with distinct concavity in lateral view ( Fig. 30 ).

Comparative notes. Archaeoptilomera kodadai sp. n. is very similar to A. derlethi sp. n., but has a reduced black colour pattern and different structures of the female's tergite 1 and the female's terminalia. In A. kodadai sp. n., the pronotum sides have no black stripes, the metanotum has no black mark dorsal of the spiracle, and the metacetabulum no black mark at its base (all three present in A. derlethi sp. n.). Tergite 1 of the female is convex and matt in A. derlethi sp. n., but flat and shiny at centre in A. kodadai sp. n. The apex of the abdomen is more depressed in A. kodadai sp. n. than in A. derlethi sp. n. (comp. Figs. 29 and 30 ), the connexival species are shorter in A. kodadai sp. n. than in A. derlethi sp. n. (comp. Figs. 29–32 ), the medial lobe of the sternite 7 of A. kodadai sp. n. has a transverse subapical impression ( Fig. 34 ), and the gonocoxa 1 lacks a ventrodistal tubercle.

Distribution. Borneo: Sarawak, only known from the type locality.

Etymology. This species is named in honour of the coleopterist Dr. Jan Kodada (Bratislava) who kindly provided the type specimen. The epithet is a noun in the genitive case.

Figures

FIGURES 25–26. Archaeoptilomera gen. n. (25) Habitus of apterous female of A. derlethi sp. n. (holotype, body length 8.1 mm), dorsal aspect. (26) Habitus of apterous female of A. kodadai sp. n. (holotype, body length 8.5 mm), dorsal aspect. © NHMW Hemiptera Image Collection, published with permission.

FIGURES 27–34. Archaeoptilomera gen. n. (holotypes, females). (27) Head of pronotum of A. derlethi sp. n., dorsal aspect. (28) Foreleg of A. derlethi sp. n., posterior aspect. (29–34) Posterior part of abdomen in (29, 30) lateral, (31, 32) dorsal, and (33, 34) ventral aspects. (29, 31, 33) A. derlethi sp. n. (30, 32, 34) A. kodadai sp. n. gc1 = gonocoxa 1; pr = proctiger; s7 = sternite 7; t7, t8 = tergite 7, 8.