Synchroa formosana Hsiao 2015
Creators: name: Hsiao, Yun
name: Ondřej Konvička
name: Chiun-Cheng Ko
Publisher: name: Zenodo
Year: 2018
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Synchroidae
Synchroa
Synchroa formosana

description: Synchroa formosana Hsiao, 2015
Figs 3G–H, 4D, J, 5G–H, P, 6L, 8
Synchroa formosana Hsiao, 2015: 244.
Diagnosis
This species is similar to Synchroa chinensis Nikitsky, 1999 in possessing unmargined lateral sides of pronotum, but can be distinguished by the following combination of characters: reddish-brown to brown body and legs; aedeagus: wider and more rounded paramere and wider basal part of median lobe.
Material examined
Holotype (Fig. 3G) TAIWAN: ♂, Malunshan, 1167 m, 24°11′30″ N, 121°1′10″ E, 4 Apr. 2013, ex larva, Y. Hsiao leg. (NMNS).
Paratype TAIWAN: 1 ex., same data as for holotype (NMNS).
Other material
TAIWAN: 1 ♀, Fushan, Ilan Co., 29 May 1995, light trap, site C, 2000, A. Warneke leg. (TFRI); 1 ♂, Tengchih, Kaoshiang, 18 Aug. 2008, C.-T. Yao leg. (TARI); 1 ♀, Ssumahsien Trail, Miaoli, 9 Jul. 2011, Y.-L. Lin leg. (TARI); 1 ♀, Fenchihu, Chiayi, 4 Sep. 2012, C.-F. Lee leg. (TARI); 1 ♂, Dalulintao [= Dalu Forest Trail], Wufeng, Hsinchu, 1 Jul. 2017, Y.-L. Lin leg. (YHC).
Supplementary description of male
ABDOMEN. Abdominal ventrite V subtruncate, with lateral sides somewhat rounded, terminal margin slightly emarginate in middle (Fig. 4J); sternite VIII concave in middle of apical edge, forming two roundly angular lobes on both sides, densely pubescent apically (Fig. 5H); sternite IX without spiculum gastrale on apical edge (Fig. 5P); tergite VIII without median strut on apical edge, emarginate in middle, moderately pubescent apically (Fig. 5G); tergite IX and X completely fused, rounded apically, densely pubescent on apical edge (Fig. 5P).
Supplementary description of female (Fig. 3H)
MAESUREMENTS. Length: 10.90–13.00 mm; width: 2.95–3.35 mm.
BODY. Similar to males.
HEAD. Eyes smaller than in male, ratio of eye diameter to interocular space 1.0:1.6–2.0. Antennae shorter in male, when directed backwards extending the posterior edge of pronotum, antennomere XI ca 3.3–4.0 times as long as maximum width. Length ratio of antennomeres as follows: 2.00:1.00:2.30:2.00:2.10:2.00: 1.90: 2.00:2.10: 2.00: 2.85.
PRONOTUM. Ca 1.5 times as wide as length, ca 1.7–1.8 times as wide as head.
ELYTRA. Slightly wider than in male, as wide as pronotal width at humeri, length ca 2.6–2.7 times width.
OVIPOSITOR. Paraproct elongate, ca 2.7–3.0 times length of coxite, sides straight and subparallel; proctiger subtruncate.
Notes
Although this species was described as having elytral striae in the basal half of the elytron, we discovered that the elytral striae are noticeable on the entire elytron (Fig. 4D) or indistinct in some specimens. Besides, elytral striae on each elytron vary from 4–7 traces in this species. On the other hand, we examined one specimen having narrower apical half of paramere than the holotype (Fig. 6L). After examination of the external morphological characters and the median lobe of the aedeagus, and in consideration of the intraspecific variation of other synchroids, we herein conclude that it is conspecific with S. formosana.
Distribution
Taiwan (Fig. 8).
description: Published as part of Hsiao, Yun, Ondřej Konvička & Chiun-Cheng Ko, 2018, The world fauna of Synchroidae Lacordaire, 1859 (Coleoptera, Tenebrionoidea, Synchroidae), pp. 1-33 in European Journal of Taxonomy 407 on pages 22-23, DOI: 10.5852/ejt.2018.407, http://zenodo.org/record/1183845