Syleter acutipalpis
Creators: name: Balkenohl, Michael
Publisher: name: Zenodo
Year: 2021
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Carabidae
Syleter
Syleter acutipalpis

description: Syleter acutipalpis (Putzeys, 1877)
Figs 8, 15, 22
Psilus acutipalpis Putzeys, 1877: XLVI.
Psilus paradoxus. – Andrewes, 1926: 381. – Andrewes, 1927: 266. – Andrewes, 1929: 387, fig. 58. – Andrewes, 1930: 288.
Syleter paradoxus. – Lorenz, 1998: 138. – Balkenohl, 2001: 30, fig. 39. – Lorenz, 2005: 148 – Balkenohl, 2017: 260.
Type material examined: RBINS; lectotype by present designation: ♂, with labels and data: yellow, handwritten in black ink “ Psilus acutipalpis P Birma.” / white, handwritten in black ink and printed “ Psilus acutipalpis Putz dét. J. Putzeys ” / white, violet printed and framed “Soc. Ent. Belg. Coll. Putzeys ” / white, handwritten in black ink and printed “ Psilus acutipalpis Putz Cotype H. E. Andrewes det. 1928” / red, framed, printed and handwritten in black ink “ Paratype de acutipalpis” / white, handwritten in black ink and printed “ Psilus paradoxus Putz. = P. acutipalpis Putz. = P. trapezicollis Bates H. E. Andrewes det.”.
Additional material: RBINS; 1 ♂, with labels and data: yellow, handwritten in black ink “ Birma ”, white, handwritten in black ink “Cl. Dyschirioides m. Birma”, white, violet printed and framed “Soc. Ent. Belg. Coll. Putzeys ”, white, black printed and handwritten in black ink “ Psilus acutipalpis Putz dét. H. E. Andrewes 1920". – NHMB; 1 ♀, handwritten and red framed: China, Lilong.
Extended diagnosis: Head anterior eyes moderately elongated, with moderately impressed transverse clypeal furrow and a second furrow in form of a letter V; clypeus, frons, and supraantennal plate smooth; neck constriction complete, developed as distinct sharp step with frons distinctly higher than neck; labrum sevensetose, mandible moderately elongated. Pronotum with reflexed lateral margin complete, diverging but slightly convex in anterior half; lateral channel of pronotum from posterior angle to base distinctly widened; basal constriction much wider than carina of flange, flange with acute carina; disk with isodiametric to transverse reticulation, with two groups of punctures laterally with the paramedian one elongated; with posterior angle obtuse but distinct. Elytron with all intervals longitudinally reticulated, reticulation with increasing distinctness towards interval eight, with small tubercle at declivity of third interval; striae moderately wide, finely granulated, with punctures indistinct, umbilical setigerous punctures of equal distance, lateral margin at apex about 20% widened. Male genitalia (Fig. 15) with aedeagus regularly curved, at apex conspicuously elongated in ventral view, in lateral view developed apically as widely rounded spatula, each paramere bisetose. Female genitalia (Fig. 22) with coxostylus regularly curved at apex, with moderately sized conelike seta preapically, ventromedially with twelve nematiform setae, five of them elongated, laterotergite with three long and two moderately long nematiform setae. Measurements. Body length lectotype and additional specimen 3.61 / 3.64 mm, width 1.19 / 1.24 mm, ratio length/width of pronotum 0.99 / 1.01, ratio length/width of elytra 1.65 / 1.61.
Distribution: South of China, Myanmar.
Type locality: Myanmar (Birma).
Remark: The species was described by Putzeys (1877) and synonymized by Andrewes (1929). Putzeys based the description on two specimens. According to Andrewes (1926, 1929), the type was deposited in “the Stettin Museum and a cotype in the Brussels Museum”. The cotype is available (RBINS) and has been designated as lectotype for reasons of the stability of the nomenclature. In the lectotype the following body parts are missing: all tarsomeres of the left front leg, left antennomeres with exception of the scapus, right antennomeres from joint six onwards. In addition, the hook at the tip of the mandibles is broken.
The description of Putzeys indicates both specimens came from Calcutta. According to Andrewes (1926) both specimens are labelled “ Birma ”. This is confirmed for the specimen deposited in RBINS.
description: Published as part of Balkenohl, Michael, 2021, Revisiting the Oriental genus Syleter Andrewes, 1941 (Coleoptera: Carabidae: Clivinini), pp. 357-374 in Revue suisse de Zoologie 128 (2) on page 362, DOI: 10.35929/RSZ.0050, http://zenodo.org/record/5640135