Oxypoda (Deropoda) extensiceps, Assing, 2010

Assing, V., 2010, A new micropterous species of Deropoda, subgenus of Oxypoda, from Italy (Coleoptera: Staphylinidae: Aleocharinae: Oxypodini), Linzer biologische Beiträge 42 (2), pp. 1177-1181 : 1178-1181

Oxypoda (Deropoda) extensiceps nov.sp. ( Figs 1-9 )

T y p e m a t e r i a l: Holotype: " Italy - Lazio, Veroli, M. Ernici, Prato di Campoli, 1000 m, 26.IV.2010, leg. Magrini / Holotypus Oxypoda extensiceps sp.n. det. V. Assing 2010 ". Paratypes: 2: same data as holotype.

D e s c r i p t i o n: Body length 2.9-3.3 mm (abdomen fully extended). Habitus as in Fig. 1 . Coloration: body reddish, with abdominal segment VI infuscate; legs dark-yellowish; antennae reddish.

Head conspicuously oblong, approximately 1.4 times as long as wide ( Fig. 2 ); dorsal surface matt due to extremely dense and coarse punctation ( Fig. 3 ). Eyes small ( Fig. 2 ) and weakly convex, not projecting from lateral contours of head, approximately half as long as postocular portion in dorsal view. Antenna ( Fig. 4 ) of moderate length, approximately 0.7 mm long, and weakly incrassate apically; antennomere III slightly less than twice as long as broad and distinctly shorter than II; IV-X moderately transverse and gradually increasing in width; X less approximately 1.5 times as wide as long; XI slightly longer than the combined length of IX and X. Maxillary palpus slender, preapical palpomere approximately 3 times as long as broad.

Pronotum ( Fig. 2 ) very weakly transverse, 1.10-1.15 times as wide as long and approximately 1.55 times as wide as head, maximal width approximately in the middle; lateral and posterior margins sinuate near posterior angles; near lateral margins weakly and longitudinally impressed in posterior half; posterior angles marked, almost rectangular; dorsal surface matt due to very dense and coarse punctation ( Fig. 5 ).

Elytra ( Fig. 2 ) short, approximately 0.75 times as long and approximately as wide as pronotum; along lateral margins longitudinally impressed; lateral margins consequently bulging, almost carinate; posterior margin with small and not very deep concavity near posterior angles; punctation coarser and more confluent than that of head and pronotum; surface with subdued shine, less matt than head and pronotum. Hind wings reduced, rudiments not projecting beyond posterior margins of elytra. Legs slender; metatarsus ( Fig. 6 ) 0.33-0.40 mm long, almost as long as metatibia; metatarsomere I elongated, approximately as long as the combined length of II-IV.

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Abdomen widest at base and gradually tapering posteriad ( Fig. 1 ); tergites III and IV matt due to very dense punctation; punctation of tergites V-VII increasingly sparser; interstices without microsculpture and glossy; posterior margin of tergite VII with very fine, barely noticeable rudiment of a palisade fringe.

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: posterior margin of sternite VIII distinctly produced, strongly convex in the middle; median lobe of aedeagus ( Fig. 7 ) approximately 0.45 mm long; apex of ventral process conspicuously acute; apical lobe of paramere long and slender ( Fig. 8 ).

: posterior margin of sternite VIII weakly convex and with row of long stout marginal setae; spermatheca as in Fig. 9.

E t y m o l o g y: The name is a noun in apposition and is composed of the Latin adjective extensus (stretched) and the noun ceps (head). It refers to the conspicuous shape of the head.

C o m p a r a t i v e n o t e s: The species is readily distinguished from all other representatives of the subgenus by the strongly oblong head and by the morphology of the aedeagus. It is additionally separated from the micropterous and similarly coloured O. depressipennis and O. graeca as follows:

from O. depressipennis by the larger eyes, the shorter and less slender antennae, and by the more slender body;

from O. graeca by the shape of the antennae ( O. graeca : antennomeres II and III of equal length; antennomeres IV and V as long as broad), the coarser punctation of the head ( O. graeca : "mässig fein ... punktirt" ( KRAATZ 1855)), the more slender pronotum ( O. graeca : "kaum um die Hälfte breiter als lang, nach hinten etwas stärker als nach vor verengt, der Hinterrand sehr wenig gerundet, aber sehr flach gewölbt, eben").

The habitus of O. depressipennis is illustrated by TRONQUET (2006), based on a specimen collected in Var (Provence), close to the type locality of that species. The comparison with O. graeca is based on the original description by KRAATZ (1855). For illustrations of the aedeagi of O. reyi and O. mutata see ZERCHE (1994). For illustrations of the similarly coloured micropterous, small-eyed O. andalusiaca ASSING 2003 from southern Spain see ASSING (2003).

D i s t r i b u t i o n a n d b i o n o m i c s: The type locality is situated in the Monti Ernici, Lazio. The reduced wings and the absence of previous records suggest that the species has a restricted distribution. The specimens were collected together with several specimens of Leptusa sibyllinica PACE 1977 and of an unidentified species of Geostiba THOMSON 1858 .

Acknowledgements

I am indebted to Peter Hlaváþ for the generous gift of the staphylinid material which included the type specimens of O. extensiceps . Benedikt Feldmann (Münster) proof-read the manuscript.

Zusammenfassung

Oxypoda (Deropoda) extensiceps nov.sp. ( Italien: Lazio), eine brachyptere Art mit auffällig langgestrecktem Kopf, wird beschrieben, abgebildet und von ähnlichen Deropoda -Arten unterschieden.

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References

ASSING V. (2003): New species and records of Oxypoda MANNERHEIM from Spain (Coleoptera: Staphylinidae, Aleocharinae). — Linzer biologische Beiträge 35 (2): 813- 829.

ASSING V. (2004 a): New species and records of Staphylinidae from Turkey II (Insecta: Coleoptera: Staphylinidae). — Beiträge zur Entomologie, Keltern 54 (1): 53-73.

ASSING V. (2004 b): New species and records of Staphylinidae from Turkey III (Insecta: Coleoptera). — Linzer biologische Beiträge 36 (2): 669-733.

ASSING V. (2006): New species and records of Staphylinidae from Turkey IV, with six new synonymies (Coleoptera: Staphylinidae). — Koleopterologische Rundschau 76: 223-276.

ASSING V. (2010): Four new species and additional records of Staphylinidae from Spain, primarily from the south (Insecta: Coleoptera). — Linzer biologische Beiträge 42 (2): 1105-1124.

KRAATZ G. (1855): Beiträge zur Kenntnis der europäischen Staphylinen. — Entomologische Zeitung (Stettin) 16: 330-334.

PORTA A. (1926): Fauna coleopterorum italica. II. Staphylinoidea. — Piacenza, Stabilimento Tipografico Piacentino: 405 pp.

SMETANA A. (2004): Staphylinidae, subfamily Aleocharinae, pp. 353-494. — In: LÖBL I. & A. SMETANA (eds), Catalogue of Palaearctic Coleoptera. II. Hydrophiloidea – Histeroidea – Staphylinoidea. — Stenstrup, Apollo Books: 942 pp.

TRONQUET M. (2006): Catalogue iconographique des coléoptères des Pyrénées-Orientales. Volume I (édition revue et augmentée). Staphylinidae. — Revue de l'Association Roussillonnaise d'Entomologie 15 (Supplément): 1-127 + 78 plates.

ZERCHE L. (1994): Die Revision der Oxypoda -Typen aus der Sammlung Claudius Rey im Musée Guimet d'Histoire naturelle de Lyon und einiger anderer Typen der Gattung sowie die Beschreibung von vier neuen Oxypoda -Arten (Coleoptera, Staphylinidae, Aleocharinae). — Coleoptera - Schwanfelder Coleopterologische Mitteilungen 6: 1-36.

Author´s address: Dr. Volker ASSING

Gabelsbergerstr. 2

D-30163 Hannover, Germany

E-mail: [e-mail]

Figures

Figs 1-9: Oxypoda extensiceps nov.sp.: (1) habitus; (2) forebody; (3) median dorsal portion of head; (4) antenna; (5) postero-median portion of pronotum; (6) metatarsus; (7) median lobe of aedeagus in lateral view; (8) paramere; (9) spermatheca. Scale bars: 1: 1.0 mm; 2: 0.5 mm; 4, 6: 0.2 mm; 3, 5, 7-9: 0.1 mm.