Anthrenus (Nathrenus) herrmanni, Kadej, Marcin & Háva, Jiří, 2016

Kadej, Marcin & Háva, Jiří, 2016, Contribution to the Dermestidae (Coleoptera) of Thailand with description of two new species, Zootaxa 4138 (3), pp. 591-600 : 594-596

Anthrenus (Nathrenus) herrmanni sp. nov.

( Figs. 1–9 )

Type locality. Thailand, Nakhon Ratchasima Khao Yai National Park.

Material Examined. Type material. Holotype (♂). THAILAND Nakhon Ratchasima Khao Yai NP Moist evergreen forest at Dong Suer Paan 14°27.511’N 101°22.408’E 760 m Malaise trap 12–19.xii.2006 Pong Sandow leg. T1308 [right metathoracic leg, left antenna, pygidium, genitalia, VII–X abdominal segments mounted in glycerine in microvial and pinned under the specimen; dorsal scales in mid elytral section near suture abraded] ( QSBG). Paratypes (25 ex): 1 ex., THAILAND Chiang Mai Doi Inthanon NP Vachirathan Fall 18°32.31’N 98°36.048’E 700 m Malaise trap 29.xii.2006 – 5.i2007 Y. Areeluck leg. T1894 ( QSBG); 1 ex., THAILAND Chiang Mai Doi Inthanon NP Vachirathan Fall 18°32.31’N 98°36.048’E 700 m Malaise trap 22–29.xii.2006 Y. Areeluck leg. T1935 ( QSBG); 4 ex., THAILAND Phetchabum Khao Kho NP Mixed deciduous forest 16°32.539’N 101°02.483’E 524 m Malaise trap 5–12.xii.2006 Somchai Chachumnan & Saink Singhtong leg. T1179 ( QSBG); 1 ex., THAILAND Phetchabum Khao Kho NP Mixed deciduous forest 16°32.539’N 101°02.483’E 524 m Malaise trap 26.xii.–2.i.2007 Somchai Chachumnan & Saink Singhtong leg. T1188 ( QSBG); 1 ex., THAILAND Phetchabum Khao Kho NP Mixed deciduous forest 16°32.539’N 101°02.483’E 524 m Malaise trap 12–19.xii.2006 Somchai Chachumnan & Saink Singhtong leg. T1182 ( QSBG); 1 ex., THAILAND Phetchabum Thung Salaeng Luang NP Kaeng Wang Nam Yen 16°37.531’N 100°53.745’E Malaise trap 29.xi.2006 6.xii.2006 T1165 ( QSBG); 4 ex., THAILAND Phetchabum Thung Salaeng Luang NP Kaeng Wang Nam Yen 16°37.531’N 100°53.745’E Malaise trap 6.xii.2006 13.xii.2006 T1168 (2 ex., QSBG, 1 ex DIBEC, 1 ex., JHAC); 1 ex., THAILAND Phetchabum Thung Salaeng Luang NP Kaeng Wang Nam Yen 16°37.531’N 100°53.745’E Malaise trap 22.xi.2006 29.xii.2006 T1162 ( QSBG); 3 ex., THAILAND Phetchabum Khao Kho NP Mixed deciduous forest 16°32.561’N 101°02.479’E 537 m Malaise trap 26.xii.2006 – 2.i.2007 Somchai Chachumnan & Saink Singhtong leg. T1187 (2 ex., QSBG, 1 ex., DIBEC); 1 ex., THAILAND Phetchabum Khao Kho NP Mixed deciduous forest 16°32.561’N 101°02.479’E 537 m Malaise trap 12–19.xii.2006 Somchai Chachumnan & Saink Singhtong leg. T1181 ( QSBG); 1 ex., THAILAND Leoi Phu Ruea NP Ma Kraow ditch 17°29.652’N 101°21.020’E 1167 m Malaise trap 12– 19.ix.2006 Patikhom Tumtip leg. T1119 ( QSBG); 1 ex., THAILAND Leoi Phu Ruea NP Hua Dong Tham Sun 17°29.540’N 101°20.995’E 1130 m Malaise trap 12–19.ix.2006 Patikhom Tumtip leg. T1118 ( QSBG); 2 ex., THAILAND Chaiyaphum Tat Tone NP Lawn near Sab Somboom forest unit 16°00.792’N 101°58.472’E 648 m Malaise trap 12.–19.xi.2006 Tawit Jaraphan leg. T1139 [one specimen with head and pronotum separated from the rest of the body] ( QSBG); 1 ex., THAILAND Chaiyaphum Tat Tone NP Chaiyapoom forest fire station 16°00.809’N 102°01.335’E 135 m Malaise trap 12.–19.xii.2006 Tawit Jaraphan leg. T1370 ( QSBG); 1 ex., THAILAND Chaiyaphum Pa Hin Ngham NP dry evergreen forest at waterfall 15°34.802’N 101°25.990’E 430 m litter sample 7.xi.2006 – 10.xi.2007 Kate Sa-nog & BuakawAdnafai leg. T1022 ( QSBG); 1 ex., Thailand NE, Loei pr., Phu Rua NP, 17°30) N 101°21´E, 6–9.iv.1999, D. Hauck lgt., ( JHAC); 1 ex., Pattaya, 1979, ( JHAC); 1 ex.: NE Laos, Hua Phan prov., Ban Saluei, Phu Pan (Mt.), 1300–1900 m, 20°12´N 104°01´E, 27.iv.–1.vi.2011, C. Holzschuh leg. ( BMNH).

Etymology. Named in honour of our close friend and collaborator Andreas Herrmann (Stade, Germany), a specialist on skin and larder beetles ( Dermestidae ).

Differential diagnosis. The new species shows a close resemblance to Anthrenus (N.) edopetri Háva, 2004 ( Thailand and Laos), but differs from it by the following characters:

• structure of male genitalia: in A. (N.) edopetri median lobe as well as parameres are narrow; apex of median lobe reaches apices of parameres; while in A. (N.) herrmanni sp. nov. median lobe as well as parameres are broad, apex of median lobe doesn’t reach apices of parameres.

• morphology of antennomere X: in A. (N.) edopetri Háva, 2004 broad (ratio of length to width 0.75:1.00); while in A. (N.) herrmanni sp. nov. narrow (ratio of length to width 0.4:1.0).

The new species is also similar to A. (N.) subsetosus Arrow, 1915 ( Myanmar and Vietnam), but can be distinguished from it by following characters:

• body size: in A. (N.) subsetosus 3.7–3.9 mm; while in A. (N.) herrmanni sp. nov. 2.4–2.6 mm.

• structure of male genitalia: in A. (N.) subsetosus median lobe broad nearly through its whole length; while in A. (N.) herrmanni sp. nov. median lobe is gradually narrowed apically.

The new species could be easily misidentified with A. (N.) mindanaoensis Háva, 2004 ( Philippines) and A. (N.) kalimantanus Háva, 2004 ( Indonesia: Kalimantan) but differs from them by the following characters:

• morphology of antennal club: in A. (N.) mindanaoensis and A. (N.) kalimantanus antennal club twosegmented, while in A. (N.) herrmanni sp. nov. three-segmented.

• morphology of male genitalia: in A. (N.) mindanaoensis apex of median lobe reaches apices of parameres, apices of parameres as well as top of median lobe distinctly sharpened (constricted); in A. (N.) kalimantanus apex of median lobe almost reaches apices of parameres, apices of parameres as well as top of median lobe distinctly sharpened (constricted); while in A. (N.) herrmanni sp. nov. apex of median lobe doesn‘t reach apices of parameres (2/3 length of parameres), apices of parameres as well as top of median lobe distinctly rounded (not constricted).

Description. Holotype: BL: 2.6 mm; BW: 1.7 mm; PL: 0.6 mm; PW: 1.35 mm; EL: 2.95 mm. Ratio of width (across humeri) to overall length 0.65:1.0. Head nearly invisible when viewed dorsally ( Fig. 1 ); eyes oval (without internal, medial deep emargination). Median ocellus present. Frons and clypeus covered with mixed whitish and yellowish scales. Antenna has 11 antennomeres. Antennal club with 3 antennomeres ( Fig. 3 ); all antennomeres brown (basal segment as well as two last segments of antennal club slightly darker). Antennal fossa conforming to shape of antennal club. Antennal club shorter than flagellum; relative length of terminal antennomere (XI) to length of the two preceding antennomeres (IX–X) combined 0.9:1.0 (nearly subequal). Ratio of length of antennal fossa to length of lateral margin of pronotum 1.0:2.0. Dorsal and ventral surface of integument dark brown, sparsely punctured, covered by thin scales ( Figs. 1–2 ). Pronotum covered by mixed whitish and orange scales ( Fig. 1 ); latero-posterior declivity with whitish scales along margin and medially; disc mainly with orange scales with only few whitish scales mixed along midline of pronotum. Lateral margin of pronotum dilated above antennal fossa and slightly visible from above. Scutellum small and poorly marked ( Fig. 1 ). Elytron covered by whitish, orange and brown scales. First sub-basal band at anterior third, zig-zagged in shape, complete, extending from suture under scutellum to humeri. Above first band narrow patch of whitish scales along anterior margin of elytra (from lateral margin to scutellum, but not reaching scutellum) present. Second submedian band near midlength of elytron, zigzagged in shape, incomplete, extending from near suture (but not touching suture) to humeri. Third subapical band placed close to apex of elytron, rotated in direction of second band. Between whitish bands there are patches of orange and brown scales ( Fig. 1 ). Scales of ventral surfaces whitish. First abdominal ventrite with postcoxal lines ( Fig. 2 ), sulcus without scales. Legs brown (tibia and tarsi slightly lighter than trochanters and femora). Only trochanters and femora covered on dorsal surface with whitish scales. Tibiae of first and second pair of legs with small tibial spines. Tarsus with two curved claws. Male genitalia as in figures 4–5. Parameres deeply u-shaped, covered with short setae on the lateral margins as well as in the central and inner areas; longer setae present on external sides of apices of parameres. Distal parts of parameres directed upwards ( Fig. 4 ). Penis (median lobe) with distal end rounded and slightly curved dorsally in lateral view ( Fig. 5 ); in dorsal and ventral views, straight ( Fig. 4 ). Apex of median lobe not reaching apices of parameres ( Fig. 4 ). Ninth abdominal segment ( Fig. 6 ) pentagonal-like; apex rounded; setae present on the dorsal and lateral margins, but only in the anterior part. Tenth abdominal segment as in figure 7. Abdominal segments VII–VIII as in figure 8. Pygidium slightly darker in basal part; remaining area with densely located, prominent setae ( Fig. 9 ).

Sexual dimorphism. No obvious external dimorphism.

Variation. Expressed by the size of the body – BL: 2.4–2.6 mm; BW: 1.35–1.7 mm; PL: 0.5–0.6 mm; PW: 1.2–1.35 mm; EL: 1.95–2.95 mm. With regard to some specimens dorsal patterns can be darker.

Figures

FIGURES 1 – 9. Holotype of Anthrenus (Nathrenus) herrmanni sp. nov. 1. Dorsal habitus; 2. Ventral habitus; 3. Antenna; 4. Aedeagus, dorsal view; 5. Penis (= median lobe, lateral view); 6. Abdominal segment IX; 7. Abdominal segment X; 8. Abdominal segment VII – VII; 9. Pygidium.