Krisna strigicollis (Spinola)

Viraktamath, C. A., 2006, Revision of the leafhopper tribe Krisnini (Hemiptera: Cicadellidae: Iassinae) of the Indian subcontinent, Zootaxa 1338, pp. 1-32: 24-26

publication ID

10.5281/zenodo.174332

publication LSID

lsid:zoobank.org:pub:D9A87687-EAA6-418E-B8D1-892AE7796A9E

persistent identifier

http://treatment.plazi.org/id/7E6887B3-FFC4-D22C-FEF3-2429FC502688

treatment provided by

Plazi

scientific name

Krisna strigicollis (Spinola)
status

 

Krisna strigicollis (Spinola) 

Figs 21, 29View FIGURES 20 – 31, 34View FIGURES 32 – 40, 80– 87View FIGURES 80 – 87

Siva strigicollis Spinola 1850: 128  . Type sex? India: Coromandal [not examined]

Krisna strigicollis (Spinola)  : Kirkaldy 1900: 243; Distant 1908: 297, Fig. 189.

Green with a reddish brown to black marginal spot on head, medially interrupted where it enlarges into larger spot; in some specimens seen as black spot on either side of median line.

Head medially longer than next to eyes, fore margin distinctly rimmed, surface on rim rugose with a strong carina dorsally, another less prominent carina on lower margin, disc of vertex transversely wrinkled, frontoclypeus depressed beneath rim, roughly sculptured, 4–5 carinae below ocelli on ocellocular area. Ocellus almost contiguous with adjacent eye. Pronotum about 2.5 times as long as vertex, about as long as or slightly shorter than scutellum.

Abdominal tergites without apodemes, apodemes of abdominal sternite 3 very well developed reaching posterior margin of 2 nd abdominal segment, diverging, each apodeme both laterally and mesally concave with much longer lateral extension distally. Apodemes of male abdominal segment 4 well developed, broader than long, medially rather contiguous. Male eighth sternite broader than long, with hind margin medially concave lateral angles rounded, entire area in apical half covered sparsely with setae.

Male genitalia: Ventral pygophore process enlarged at distal 0.33 then tapered asymmetrically, distal half of enlarged area longitudinally rugose. Subgenital plate with Vshaped excavation near proximal area on mesal margin. Style with apophysis of type 2. Aedeagus robust, broadest at midlength, gonopore visible as a tube between 2 margins of trough formed by concavity of aedeagal shaft on ventral margin, dorsal margin with rough sculpturing in C-shaped concavity, in lateral aspect apical 0.33 of shaft much narrower.

Female genitalia: Hind margin of seventh sternite slightly concave medially, with rounded lateral angles. Second pair of gonapophysis with undulated margin between distal 2 prominent teeth, also on margin beyond distal prominent tooth, ventral margin with subapical notch, dorsal margin before proximal prominent tooth serrated for short distance.

Measurements: Male 10.17 (9.50–11.60) mm long, 2.60 mm wide across eyes, 3.30 (3.20–3.60) mm wide across hind margin of pronotum. Female 11.60 (10.90–12.30) mm long, 2.90 mm wide across eyes, 3.70 (3.60–5.90) mm wide across hind margin of pronotum.

Material examined: India: West Bengal: 2 ď, 3 Ψ, Calcutta, 22.xi. 1981; 1 ď, Kalimpong, 1780 m, 6.vi. 2005; Karnataka: 1 Ψ, Mudigere, 5.vi. 1979; Kerala: 1 ď, Maraiyur, 1066 m, 24.iii. 1977, all collected by C.A. Viraktamath; Trichur: Mannuthy, 25.xi. 1976, at light, G. Mathew; 1 Ψ, Walayar, 26.x. 1975, C. A. Viraktamath; Malabar: Walayar forest, 1000ft (303 m), vi. 1957, P.S. Nathan ( IRSNBAbout IRSNB); India: Neerlandaiser, Suyoscerbuyk ( IRSNBAbout IRSNB). Nepal: 1 Ψ, near Birganj, Lothar, 450 ft (137 m), 9.ix. 1967, Canadian Nepal Expedition ( CNCAbout CNC).

Remarks: Specimens from Thailand (2 Ψ, IRSNBAbout IRSNB) and Philippines (1 ď, 1 Ψ) were also examined during the study. All specimens studied have two black transverse spots on the anterior margin of the head. Males also possess prominent basal abdominal apodemes. Selenocephalus costalis Stål (1859: 290)  from Malay Peninsula, currently a junior synonym of this species, is probably a species distinct from K. strigicollis  . The anterior rim of its head is very similar to that of K. magna Baker  ( Fig. 20View FIGURES 20 – 31). In K. magna  the rim and vertex do not bear any striae, but these are present in K. strigicollis  . K. magna  is also very robust and has a more strongly arched pronotum than does K. strigicollis  . Another current synonym of K. strigicollis  is K. stramineus Walker. The  female type of the latter species ( BMNH, figured by Distant, 1908, fig. 189) matches K. strigicollis  but is labeled from Java. However, examination of numerous specimens from the Pacific by M.D. Webb ( BMNH) has revealed no further matching specimens, e.g. with two spots on the forehead. It is concluded therefore, that this may be a mislabeled specimen. The male genitalia of a specimen from Java was figured as K. strigicollis  by Linnavuori and Quartau (1975, fig. 100 a–d), but the aedeagus does not match the specimens figured here and it is concluded that this is a misidentification. Also, in the same paper the figure of K. kirbyi  (fig. 100 e), without locality data, appears to be that of K. varia  .

This species resembles K. bakeri  and can be easily recognized by the spots on the forehead, ocelli being very close or contiguous with the adjacent eyes, and the strongly developed abdominal apodemes in addition to the structure of the aedeagus and the apex of the apophysis of the style. From K. bakeri  it differs in the shape of the aedeagus, style, and abdominal apodemes; the ventral margin of aedeagus is uniformly curved in K. bakeri  whereas it is slightly concave at midlength in K. strigicollis  .

IRSNB

Institut Royal des Sciences Naturelles de Belgique

CNC

Canadian National Collection of Insects, Arachnids, and Nematodes

Kingdom

Animalia

Phylum

Arthropoda

Class

Insecta

Order

Hemiptera

Family

Cicadellidae

Genus

Krisna

Loc

Krisna strigicollis (Spinola)

Viraktamath, C. A. 2006

2006
Loc

Krisna strigicollis

Distant 1908: 297
Kirkaldy 1900: 243

1900
Loc

Siva strigicollis

Spinola 1850: 128