Research Article |
Corresponding author: Yuxia Yang ( yuxia0305@126.com ) Academic editor: Hume Douglas
© 2018 Yuxia Yang, Yaqing Qi, Xing-Ke Yang.
This is an open access article distributed under the terms of the Creative Commons Attribution License (CC BY 4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
Citation:
Yang Y, Qi Y, Yang X (2018) Four new species of Fissocantharis Pic, 1921 (Coleoptera, Cantharidae) from China. ZooKeys 738: 97-115. https://doi.org/10.3897/zookeys.738.19884
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Four new species of Fissocantharis Pic, 1921 are described: F. securiclata sp. n. (China: Zhejiang, Anhui), F. maculicollis sp. n. (China: Zhejiang), F. hainana sp. n. (China: Hainan) and F. laticollis sp. n. (China: Hainan), which are illustrated with the habitus and aedeagus of the male, the abdominal sternite VIII and the internal genitalia of the female. A key to the species from southeast China is provided.
East Asia, description, Cantharinae , taxonomy
The taxonomy of the Chinese species of Fissocantharis Pic, 1921 (sensu
The material is preserved in the following collections: Institute of Zoology, Chinese Academy of Sciences, Beijing, China (
Genitalia of both sexes and abdominal sternites VIII of females were dissected and cleared in 10% KOH solution, and female genitalia were dyed with hematoxylin. Habitus photos were taken by a Leica M205A stereomicroscope, multiple layers were stacked using Combine ZM (Helicon Focus 5.3). Line drawings were made using a camera lucida attached to a Nikon SMZ1500 stereomicroscope, then edited in CorelDRAW 12 and Adobe Photoshop 8.0.1.
Complete label data in Chinese are transliterated for type specimens, and quotation marks are used for labels in English. Body length was measured from the anterior edge of the clypeus to the elytral apex and body width across the humeri of elytra. Morphological terminology of female genitalia follows
1 | Elytra red-brown or yellow-brown | 2 |
– | Elytra black or dark purple or blue | 3 |
2 | Antennomeres III–VI with longitudinal ridges along lateral edges, VI–VIII each with a deep and oblong fovea ( |
F. pieli (Pic, 1937) |
– | Antennomeres IV–XI with longitudinal impressions along lateral edges ( |
F. acuticollis Y. Yang & X. Yang, 2014 |
3 | Antennae filiform or subfiliform with middle antennomeres nearly parallel-sided or at most obliquely widened apically | 4 |
– | Middle antennomeres strongly deformed in various ways, unlike above | 16 |
4 | Antennae simple | 5 |
– | Middle antennomeres with impressions or ridges or bulges along lateral edges | 9 |
5 | Pronotum wider than long, about 1.2 times as wide as long | F. laticollis sp. n. |
– | Pronotum longer than wide or subequal, at most 1.1 times as long as wide | 6 |
6 | Pronotum uniformly black | 7 |
– | Pronotum yellow, with a large black marking on disc | F. maculicollis sp. n. |
7 | Head uniformly yellow | 8 |
– | Head mostly black | F. paulioincrassata (Wittmer, 1951) |
8 | Maxillary palpomeres II–IV dorsoventrally flattened and widened, II convex at basal part of dorsal side | F. latipalpa Y. Yang & X. Yang, 2015 |
– | Maxillary palpomeres II–IV slender, not flattened or widened | F. pallidiceps (Pic, 1911) |
9 | Middle antennomeres with longitudinal costa-like ridges along lateral edges | 10 |
– | Middle antennomeres with smooth impressions or scar-like bulges along lateral edges | 11 |
10 | Antennae slightly cylindrically thickened, antennomeres III–IX with longitudinal ridges along lateral edges; aedeagus: conjoint dorsal plate of parameres longer than ventral process of each paramere | F. buonloiensis Wittmer, 1993 |
– | Antennae slightly dorsoventrally flattened, antennomeres III–VIII with longitudinal ridges along lateral edges; aedeagus: conjoint dorsal plate of parameres shorter than ventral process of each paramere | F. sexcostata Y. Yang & X. Yang, 2015 |
11 | Middle antennomeres with oblong scar-like bulges along lateral edges | 12 |
– | Middle antennomeres with longitudinal or oblong or round impressions along lateral edges | 13 |
12 | Aedeagus: conjoint dorsal plate of parameres with apical edge rounded in middle, ventral processes abruptly narrowed apically | F. gracilipes (Pic, 1927) |
– | Aedeagus: conjoint dorsal plate of parameres with apical edge acute in middle, ventral processes evenly narrowed apically | F. eschara Y. Yang & X. Yang, 2015 |
13 | Antennomeres III–X parallel-sided | F. sinensomima Y. Yang & X. Yang, 2015 |
– | Antennomeres III–X slightly dorsoventrally flattened and obliquely widened apically | 14 |
14 | Aedeagus: conjoint dorsal plate of parameres greatly reduced, with apical edge nearly horizontally aligned with bases of ventral process of each paramere | F. basilaris Y. Yang & X. Yang, 2015 |
– | Aedeagus: conjoint dorsal plate of parameres moderately developed, with apical edge distinctly protuberant over bases of ventral process of each paramere | 15 |
15 | Aedeagus: conjoint dorsal plate of parameres about half length of ventral process of each paramere, nearly parallel-sided at basal part | F. sinensis (Wittmer, 1988) |
– | Aedeagus: conjoint dorsal plate of parameres about one-third length of ventral process of each paramere, tapered apically | F. hainana sp. n. |
16 | Antennomeres III–IV or to V deformed, cylindrically thickened or excavate | 17 |
– | Antennomeres III–VIII or to IX, X, XI deformed, at least one antennomere not parallel-sided, or excavate or emarginate | 20 |
17 | Maxillary palpomeres II–III excavate | 18 |
– | Maxillary palpi not excavate | 19 |
18 | Antennomere IV with two projections at basal part ( |
F. biprojicientis Y. Yang & X. Yang, 2015 |
– | Antennomere IV unlike above, without projections ( |
F. bidifformis (Wittmer, 1988) |
19 | Antennomere III excavate along the whole length of lateral edge, IV distinctly wider than III ( |
F. similis (Wittmer, 1951) |
– | Antennomere III excavate at apex, IV as wide as III ( |
F. tridifformis (Wittmer, 1988) |
20 | Antennomere XI knife-like, with lateral edge triangularly protuberant near basal one-fourth part, obliquely narrowed apically, acute at apex ( |
21 |
– | Antennomere XI parallel-sided | 23 |
21 | Antennomeres XI about one-third longer than X | F. angusta (Fairmaire, 1900) |
– | Antennomeres XI about as twice long as X | 22 |
22 | Antennae and legs mostly black; aedeagus: conjoint dorsal plates of parameres with apical edge straight | F. tachulanensis (Wittmer, 1988) |
– | Antennae and legs mostly orange; aedeagus: conjoint dorsal plates of parameres with apical edge rounded | F. flavimembris (Wittmer, 1951) |
23 | Antennomere IX distinctly lengthened and widened, about twice as long as wide | 24 |
– | Antennomere IX unlike above | 25 |
24 | Antennomere IX with lateral edges triangularly protuberant and slightly curled dorsally in middle ( |
F. novemexcavata (Wittmer, 1951) |
– | Antennomere IX parallel-sided ( |
F. novemoblonga Y. Yang & X. Yang, 2015 |
25 | Antennomere IV distinctly cylindrically thickened and excavate along the whole length of lateral edge, width wider ventrally than dorsally, V–X with apical angles truncate and finely bordered ( |
F. imparicornis (Y. Yang & X. Yang, 2009) |
– | Antennomeres IV–X unlike above | 26 |
26 | Antennomeres III–VIII each emarginate at apical part of lateral edge ( |
F. multiexcavata (Wittmer, 1988) |
– | Antennomeres III–VIII unlike above | 27 |
27 | Antennomeres VIII or and VII projecting laterally | 28 |
– | Antennomeres VII and VIII unlike above | 29 |
28 | Antennomere VIII with apical angle strongly projecting laterally, III–VIII minutely serrated along lateral edges ( |
F. flavicornis (Gorham, 1889) |
– | Antennomeres VII–VIII with apical angles moderately projecting laterally, III–VIII not serrated along lateral edges ( |
F. cicatricosa (Wittmer, 1988) |
29 | Antennomeres III–X obliquely widened apically ( |
F. liuchowensis (Wittmer, 1989) |
– | Antennomere III obliquely widened apically, IV–IX securiform, which abruptly widened apically and rounded at apical angles (fig. 1); aedeagus: conjoint dorsal plate of parameres moderately developed, with apical edge distinctly protuberant over bases of ventral processes | F. securiclata sp. n. |
Remarks. In the key, F. bothridera (Fairmaire, 1887) (located in Fujian) is not included, because it was described only on the female form, which is difficult to distinguish among other female Fissocantharis (
Holotype ♂ (
China (Anhui, Zhejiang).
Male (Fig.
Head subquadrate, narrowed posteriorly behind eyes; eyes moderately projecting, head width across eyes greater than that of anterior edge of pronotum; apical maxillary palpomeres nearly long-triangular, widest at apical two-fifths, acute at apices; antennae extending to elytral midlength, antennomeres II about twice as long as wide, III obliquely widened apically, truncate at apical angles, about twice as long as wide, IV–IX securiform, abruptly widened apically and rounded at apical angles, IV and IX slightly longer than wide, V–VIII nearly as long as wide, X and XI nearly parallel-sided, XI pointed at apices and about 1.5 times as long as X.
Pronotum subquadrate, about 1.1 times longer than wide, anterior edge arcuate, sides slightly diverging posteriorly, posterior edge nearly straight, anterior angles rounded, posterior angles nearly rectangular, disc slightly convex at posterolateral parts, surface finely and densely punctate.
Elytra about 3.0 times longer than wide, 4.0 times longer than pronotum, width at humeri greater than posterior edge of pronotum, sides nearly parallel, surface slightly more coarsely and densely punctate than pronotum.
Legs with all tarsal claws bifid, each with lower projection as long as upper one.
Aedeagus (Fig.
Female. Similar to male, but vertex black, antennae black, antenomeres I and II orange, filiform and simple, extending to basal third of elytra. Abdominal sternite VIII (Fig.
Internal genitalia (Fig.
Body length: 7.9–9.0 mm; width: 1.7–2.0 mm.
The specific name is derived from Latin securiclatus (axe-like), referring to its antennomeres IV–IX securiform in male, which abruptly widened apically and rounded at apical angles.
Head mostly orange, pronotum and elytra uniformly black; male antennomeres IV–IX securiform, abruptly widened apically and rounded at apical angles; aedeagus: conjoint dorsal plate of parameres moderately developed, about one-third length of ventral process of each paramere, slightly narrowed apically, with apical edge medially concave.
No other species has the male antennomeres IV–IX securiform as in this species. This species is similar to F. pallidiceps (Pic, 1911) in the body coloration, but can be easily distinguished by the male antennae, of which the antennomeres III–IX are widened apically, while simple filiform in F. pallidiceps (
Holotype ♂ (
China (Zhejiang).
Male (Fig.
Head subquadrate, narrowed posteriorly behind eyes; eyes strongly projecting, head width across eyes greater than that of anterior edge of pronotum; apical maxillary palpomeres nearly long-triangular, widest at apical two-fifths, acute at apices; antennae filiform and simple, extending to apical third of elytra, antennomeres II about 1.5 times as long as wide, III about 3.0 times as long as II, IV–X subequal in length, XI pointed at apices and slightly longer than X.
Pronotum subquadrate, about 1.1 times longer than wide, anterior edge rounded, sides slightly diverging posteriorly and sinuate, posterior edge nearly straight, anterior angles rounded, posterior angles nearly rectangular, disc convex at posterolateral parts, surface finely and densely punctate.
Elytra about 3.5 times as long as wide, 5.0 times as long as pronotum, width at humeri greater than posterior edge of pronotum, sides nearly parallel, surface slightly more coarsely and densely punctate than pronotum.
Legs with all tarsal claws bifid, each with lower projection as long as upper one.
Aedeagus (Fig.
Female. Similar to male, but eyes only slightly projecting, antennae narrower and shorter, extending to basal third of elytra, pronotum slightly convex at posterolateral parts. Abdominal sternite VIII (Fig.
Internal genitalia (Fig.
Male antennae mostly yellow in some throughout antennomere or ventrally. Body length: 6.2–7.4 mm; width: 1.2–1.6 mm.
The specific name is derived from the Latin macula (marking) and collum (neck), referring to its pronotum with a black marking on disc.
Elytra black, prothorax yellow, pronotum with a large dark brown marking on disc; male antennae filiform and simple; aedeagus: conjoint dorsal plate of parameres moderately developed, about a half length of ventral process of each paramere, with apical edge rounded.
This new species is similar to F. nigriceps Y. Yang & Okushima, 2016 (located in Taiwan) in the body shape and male antennae, but can be distinguished from the latter by the following characters: the pronotum has a black marking on the disc and the aedeagus has a wider conjoint dorsal plate of parameres, while in F. nigriceps, the pronotum is uniformly orange and the aedeagus has a narrower conjoint dorsal plate of parameres (
Holotype ♂ (
China (Hainan).
Male (Fig.
Head subquadrate, narrowed posteriorly behind eyes; eyes strongly projecting, head width across eyes wider than that of anterior edge of pronotum; apical maxillary palpomeres nearly long-triangular, widest at apical two-fifths, acute at apices; antennae nearly extending to elytral apices, antennomeres II nearly as long as wide, III–IX dorsoventrally flattened and obliquely widened apically, III about 3.0 times as long as II, IV–X subequal in length, X and XI parallel-sided, XI pointed at apices and slightly longer than X, III–XI each with a round or oblong smooth impression near middle of lateral edge.
Pronotum subquadrate, nearly as long as wide, widest near base, anterior edge rounded, sides sinuate, posterior edge nearly straight, anterior angles rounded, posterior angles nearly rectangular, disc convex at posterolateral parts, surface finely and densely punctate.
Elytra about 3.0 times longer than wide, 4.0 times longer than pronotum, width at humeri greater than posterior edge of pronotum, sides nearly parallel, surface slightly more coarsely and densely punctate than pronotum.
Legs with all tarsal claws bifid, each with lower projection as long as upper one.
Aedeagus (Fig.
Female. Similar to male, but eyes only slightly projecting, antennae filiform and simple, extending to midlength of elytra, pronotum moderately convex at posterolateral parts. Abdominal sternite VIII (Fig.
Internal genitalia (Fig.
Female internal genitalia, lateral view: A Fissocantharis securiclata sp. n. B F. maculicollis sp. n. C F. hainana sp. n. D F. laticollis sp. n. Scale bars: 1.0 mm. (ag: accessory gland; di: diverticulum; eva: extension of vagina; sd: spermathecal duct; sp: spermatheca; ov: median oviduct; va: vagina).
Pronotum orange in some, only darkened at anterior and posterior margins, elytra dark blue, or with weakly metallic reflection. Body length: 7.0–11.5 mm; width: 1.3– 2.2 mm.
The specific name is derived from the type locality, Hainan Province, China.
Elytra dark purple, with metallic reflection; male antennae subfiliform, antennomeres III–IX dorsoventrally flattened and obliquely widened apically, III–XI each with a round or oblong smooth impression near middle of lateral edge; aedeagus: conjoint dorsal plate of parameres moderately developed, about one-third length of ventral process of each paramere, with apical edge acute in middle.
The new species is similar to F. langana (Pic, 1923) (located in N. Vietnam), F. langaniformis (Wittmer, 1989) (N. Vietnam) and F. sinensis (Wittmer, 1988) in the body coloration and male antennae, but can be distinguished by the structure of the aedeagus: the conjoint dorsal plate of parameres is moderately developed, about one-third length of ventral process of each paramere, with the apical edge acute in the middle, while it is greatly reduced in F. langana (
Holotype ♂ (
China (Hainan).
Male (Fig.
Head rounded, slightly narrowed posteriorly behind eyes; eyes moderately projecting, head width across eyes slightly wider than that of anterior edge of pronotum; apical maxillary palpomeres nearly long-triangular, widest at apical two-fifths length, acute at apices; antennae filiform and slightly thickened, extending to apical third of elytra, antenomeres II slightly longer than wide, III about twice as long as II, IV–X subequal in length, XI pointed at apices and slightly longer than X.
Pronotum transverse, about 1.2 times wider than long, anterior edge rounded, sides sinuate, slightly converging posteriorly at anterior one-third length, then slightly diverging posteriorly at posterior part, posterior edge slightly arcuate, anterior angles subrounded, posterior angles nearly rectangular, disc slightly convex at posterolateral parts, surface finely and densely punctate.
Elytra about 3.5 times as long as wide, 4.5 times as long as pronotum, width at humeri slightly greater than posterior edge of pronotum, sides nearly parallel, surface slightly more coarsely and densely punctate than on pronotum.
Legs with all tarsal claws bifid, each with lower projection as long as upper one.
Aedeagus (Fig.
Female. Similar to male, but eyes slightly projecting, head width across eyes nearly as wide as anterior edge of pronotum, antennae narrower and shorter, extending to midlength of elytra. Abdominal sternite VIII (Fig.
Internal genitalia (Fig.
Body length: 4.0–5.5 mm; width: 0.8–1.1 mm.
The specific name is derived from the Latin latus (wide) and collum (neck), referring to its pronotum wider than long.
Elytra black; male antennae filiform and simple; pronotum transverse, about 1.2 times wider than long, sides sinuate, slightly converging posteriorly at anterior one-third length, then slightly diverging posteriorly at posterior part; aedeagus: conjoint dorsal plate of parameres reduced, with apical edge deeply emarginate in middle.
This species could be distinguished by its pronotum, which is distinctly wider than long, while always longer than wide or subequal in length in other species of Fissocantharis. It is more similar to F. imparicornis (Y. Yang & X. Yang, 2009) (China: Hainan) in body coloration, but differs from the latter by the following characters: the male antennae are simple and the aedeagus has a reduced conjoint dorsal plate of parameres, while in F. imparicornis, the middle antennomeres of the male are deformed and the aedeagus has a well-developed conjoint dorsal plate of parameres.(
Fissocantharis acuticollis Y. Yang & X. Yang, 2014
Fissocantharis acuticollis Y. Yang & X. Yang, 2014,
Distribution. China (Zhejiang, Fujian, Guangdong, Hunan).
Fissocantharis bothridera (Fairmaire, 1887)
Rhagonycha bothridera Fairmaire, 1887: 125, 127.
Rhagonycha nigricoloriceps Pic, 1928: 55. Synonymized by
Micropodabrus bothriderus:
Fissocantharis bothridera:
Distribution. China (Fujian).
Fissocantharis flavimembris (Wittmer, 1951)
Podabrus flavimembris Wittmer, 1951: 96, fig. 1.
Micropodabrus flavimembris:
Fissocantharis flavimembris:
Distribution. China (Fujian).
Fissocantharis imparicornis (Y. Yang & X. Yang, 2009)
Micropodabrus imparicornis Y. Yang & X. Yang, 2009: 65, figs 1–9.
Fissocantharis imparicornis:
Distribution. China (Hainan).
Fissocantharis novemexcavata (Wittmer, 1951)
Podabrus novemexcavatus Wittmer, 1951: 97, fig. 3.
Podabrus novemexcavatus ab. testaceicollis Wittmer, 1951: 97, fig. 3. Synonymized by
Micropodabrus novemexcavatus:
Fissocantharis novemexcavata:
Distribution. China (Fujian).
Fissocantharis novemoblonga Y. Yang & X. Yang, 2015
Fissocantharis novemoblonga Y. Yang & X. Yang, 2015,
Distribution. China (Zhejiang, Anhui).
Fissocantharis pauloincrassata (Wittmer, 1951)
Podabrus pauloincrassatus Wittmer, 1951: 97.
Micropodabrus pauloincrassatus:
Fissocantharis pauloincrassata:
Distribution. China (Fujian).
Fissocantharis pallidiceps (Pic, 1911)
Rhagonycha pallidiceps Pic, 1911: 271.
Micropodabrus pallidiceps:
Fissocantharis pallidiceps:
Distribution. China (Zhejiang).
Fissocantharis pieli (Pic, 1937)
Lycocerus pieli Pic, 1937: 172.
Micropodabrus pieli:
Fissocantharis pieli:
Distribution. China (Zhejiang, Fujian).
Fissocantharis similis (Wittmer, 1951)
Podabrus similis Wittmer, 1951: 97.
Micropodabrus similis:
Fissocantharis similis:
Distribution. China (Fujian).
We are grateful to the late Dr. Michel Brancucci (NHMB) not only for his providing a chance for the first author to visit and study in the Naturhistorisches Museum Basel for one year, but also for many valuable suggestions in studying the taxonomy of Cantharidae. We are also indebted to Mr. Andreas Kopetz (Germany) for his providing some material for our study and to the editor Dr. Hume Douglas (Canada) for his great suggestions in improving our manuscript.
The present study is supported by the National Natural Science Foundation of China (Nos, 41401064, 31772507), the Knowledge Innovation of Chinese Academy of Sciences (No. KSCX2-EW-Z-8), Natural Science Foundation of Hebei Province (C201720112) and a foundation for the young talents in colleges and universities of Hebei Province (BJ2017030).