Cylindera species

Matalin, A. V., 2023, An annotated checklist of the species of the subgenus Ifasina Jeannel, 1946, genus Cylindera Westwood, 1831 (Coleoptera, Cicindelidae), from the Philippines, with the description of a new species, Far Eastern Entomologist 473, pp. 1-19 : 14-15

Key to the Cylindera species of the subgenus Ifasina known from the Philippines

1. Elytra immaculate, with coarse and distinctive microsculpture; head and pronotum coarsely rugose; labrum long and pale, with large, metallic, submarginal pores .............. .......................................................................................... C. (I.) foveolata (Schaum, 1863)

– Elytra clearly maculate, with humeral and apical lunules, and a middle band which in some species is broken into several spots; head and pronotum finely rugulose; labrum without large, metallic, submarginal pores ..................................................................................... 2

2. Labrum shorter, non-metallic, entirely or partly pale with dark metallic tinged margins, with or without indistinct median carina ........................................................................... 3

– Labrum longer, entirely metallic, with a distinct median carina ......................................... 8

3. Elytra without white basodiscal spot ................................................................................... 4

– Elytra with a white basodiscal spot ...................................................................................... 5

4. Labrum with narrow, dark, lateral and anterior margins; elytra in both sexes copper-green with blue lateral margins; fore tarsomeres 2–3 in males very large and dilated ...... ..................................................................................... C. (I.) dilatotarsa (W. Horn, 1924)

– Labrum with broad, dark, lateral and anterior margins; elytra in males bright blue, in females bronze-brown; fore tarsomeres 1–3 in males long and cylindrical, 3rd one slightly dilated .................................................................... C. (I.) richouxi Dheurle, 2016

5. Labrum with a black central area; apical lunule incomplete and broken into a large and rounded ante-apical and a small and oval apical spot ...... C. (I.) mouthiezi Dheurle, 2015

– Labrum only with dark brown margins; apical lunule complete .......................................... 6

6. Labrum with a narrow, dark brown, anterior margin; middle band incomplete and broken into a sublateral and a discal spots; elytra of females clearly dilated in anterior third ................................................................. C. (I.) discreta elaphroides ( Dokhtouroff, 1882)

– Labrum with broad, dark brown, anterior and lateral margins; middle band complete, slightly oblique or sinuate; elytra of females only slightly delated in anterior third ......... 7

7. Elytra slightly elevated roof-like along suture in apical part; middle band with short lateral portion, ante-apical portion of apical lunule connected to marginal portion at an acute or virtually right angle (not more than 95 o); elytra of females additionally at most with only a small, often missing metallic basodiscal mirror; aedeagus with a shorter basal portion ........................................................................................ C. (I.) macilenta ( Schaum, 1862)

– Elytra, especially so in females, strongly elevated roof-like along suture in apical part; middle band without lateral portion, ante-apical portion of apical lunule connected to marginal portion at an obtuse angle (more than 100 o); elytra of females additionally with a very large, metallic basodiscal mirror; aedeagus with a longer basal portion ....... ......................................................................................................... C. (I.) klimenkoi sp. n.

8. Humeral lunule entirely absent .......................................... C. (I.) viduata (Fabricius, 1801)

– Humeral lunule present ....................................................................................................... 9

9. Humeral lunule as very small, virtually invisible, basodiscal spot; ante-apical portion of apical lunule long and thin .......................................... C. (I.) fabiocassolai Wiesner, 1989

– Humeral lunule as rounded, clearly visible, basodiscal spot; ante-apical portion of apical lunule short and broad, comma-shaped ........................................................................... 10

10. Elytra shorter, distinctly broad in apical third (EL/EW = 1.6–1.65); aedeagus short, broadened in middle part .......................................................... C. (I.) rizali Dheurle, 2021

– Elytra longer, indistinctly broad in apical third (EL/EW = 1.75–1.9); aedeagus long, not broadened in middle part ................................................................................................. 11

11. Colour of top surface, including labrum, copper-bronze; elytra with narrower, sharply convergent apices; apical third without metallic lustre ................................................... .................................................................... C. (I.) balabacensis Naviaux et Sawada, 1996

– Colour of top surface, including labrum, greenish blue; elytra with broader and gradually rounded apices; apical third and lateral margins with bright metallic lustre ......... ........................................................................................... C. (I.) semperi (W. Horn, 1893) At present, 12 species or subspecies of the subgenus Ifasina have reliably been recorded from the Philippines ( Fig. 48 ). Among them, ten species (83.3%) are endemic to various parts of the archipelago. Only C. discreta elaphroides is a widespread Philippine endemic which occurs both on all larger and several smaller islands. In contrast, C. richouxi , C. balabacensis and C. klimenkoi sp. n. are known only from the type localities within a single island. The greatest species diversity is encountered on the largest and simultaneously most populous Luzon Island. Eight species of Ifasina are found there, six of them being Philippine endemics, while C. fabiocassolai and C. klimenkoi sp. n. are both endemic to Luzon. On Mindanao, the second largest island, only three species from this subgenus have been recorded. Two of them are Philippine endemics, among which C. mouthiezi is endemic to Mindanao. Generally, the fauna of Philippine tiger beetles still remains studied rather fragmentarily. Objectively, this is also due to the huge number of islands (more than 7.100) in the archipelago, the prospection of which may takes many years.

Figures

Fig. 48. Distribution of Cylindera (Ifasina) spp. in the Philippines: red solid circle – C. macilenta; red half-solid circle – C. mouthiezi; red crossed-circle – C. klimenkoi sp. n.; red open circle – C. richouxi; orange solid triangle – C. foveolata; blue solid rhomb – C. semperi; blue half-solid rhomb – C. fabiocassolai; blue crossed-rhomb – C. balabacensis; blue open rhomb – C. rizali; blue asterisk – C. viduata; lilac solid quadrat – C. dilatotarsa; lilac open quadrat – C. discreta elaphroides. Map source: https:.en.wikipedia.org/wiki/Philippines#/ media/File:Relief_Map_Of_The_Philippines.png