Coccus lambirensis Gullan & Kondo, 2018

Gullan, Penny J., Kondo, Takumasa, Fiala, Brigitte & Quek, Swee-Peck, 2018, Taxonomy of coccids (Hemiptera: Coccidae: Coccus L.) associated with Crematogaster ants (Hymenoptera: Formicidae) in the stems of Macaranga plants (Euphorbiaceae) in Southeast Asia, Zootaxa 4521 (1), pp. 1-51 : 20-22

Coccus lambirensis Gullan & Kondo sp. n.

urn:lsid:zoobank.org:act:CBBDC76D-0BBC-4E83-86C3-9BB452F41D79

( Fig. 6 )

“ Coccus sp. X”, Quek et al. 2017: 823

This species was referred to as “ Coccus sp. X” in Quek et al. (2017) (use of this name is not intended to be for nomenclatural purposes). The holotype listed below is the only known specimen and is a DNA voucher. Its nucleotide sequence data place it as sister to a specimen identified as Coccus near macarangicolus in figure 3 of Quek et al. (2017). Coccus X is sufficiently distinct morphologically to be described below as a new species.

Type material examined. Holotype: young adult female, BORNEO: Sarawak, Lambir Hills National Park , ex Macaranga beccariana , 11–15 Aug. 2002, coll. T. Itioka, TI.s39, DNA voucher 1(1) ( FDS).

Etymology. This species is named after its collection locality, “Lambir”, referring to a site in primary forest in Lambir Hills National Park, called Taman Negara Bukit Lambir in Malay.

Adult female. Unmounted material. Unknown.

Slide-mounted adult female (n=1; Fig. 6 ). Body oval, 2.83 mm long, 2.56 mm wide.

Dorsum. Derm (dd) membranous, with irregular polygonal areas abutting each other, each with a central areolation, and with faint submarginal wrinkle lines radiating inwards from margin. Dorsal setae (dset) slender, flagellate, each 35–88 µm long, longest from head to anterior abdomen and shortest on area lateral and posterior to anal plates. Simple pores (sp) each about 2.5 µm wide, scattered evenly on dorsum. Preopercular pores (pop) each 3.8–7.5 µm wide, 5 in number, present in a medial cluster anterior to anal plates. Dorsal microducts (dmic) in areolations each about 2.0– 2.5 µm wide, appearing bilocular under high magnification. Anal plates (anplt) each triangular but outer apex of each plate distorted (perhaps during slide preparation), anterolateral margin 1.3 times longer than posterolateral margin and both margins slightly convex, length of each plate 1.8 times width, inner lobes normal, each plate 200 µm long, 110 µm wide, anterolateral margin 162–163 µm long, posterolateral margin 125 µm long; each plate with 9 flagellate dorsal setae, each 10–40 µm long. Anal ring (ar) probably bearing 10 setae (difficult to see), each 75–90 µm long.

Margin. Eyespots not detected. Marginal setae (mset) in 2 rows, each seta fairly robust and almost always flagellate at apex, 27–58 µm long, with 41–45 setae between anterior and posterior stigmatic areas on each of body. Stigmatic setae (stgset) well developed, spinose with rounded apices, apparently 3 in number, median setae longest, each 25–45 µm long, lateral setae each 15–35 µm long.

Venter (partially missing on holotype). Derm membranous. Ventral setae (vset) slender, mostly each 10–25 µm long, except prevulvar setae each up to 88 µm long. Interantennal setae missing due to damage to ventral cuticle. Ventral tubular ducts (vtd) present in a broad submarginal band; each duct with outer ductule 17–18 µm long, inner ductule about 20 µm long, and duct opening about 2 µm wide. Ventral microducts (vmic) each about 2 µm wide, scattered fairly evenly on venter. Pregenital disc-pores (pgp) each 6–8 µm wide and mostly with 10 (occasionally 6, 8 or 9) loculi. Antennae (ant) 7 segmented, each 320 µm long; fleshy setae present on last 2 segments. Clypeolabral shield missing; labium ~ 100 µm long, ~ 100 µm wide. Legs with hind trochanter + femur 172–175 µm long; hind tibia + tarsus 195–200 µm long; all tarsal digitules each 47–58 µm long; claw digitules each 20–23 µm long, claws each 27–28 µm long. Spiracles normal: anterior peritremes each 62–63 µm wide; posterior peritremes each 72–73 µm wide. Spiracular pores (spp) each 4–5 µm wide, usually with 5 (rarely 3 or 4) loculi.

Comments. The adult female of C. lambirensis can be distinguished from all other species of Coccus found on Macaranga by its possession of numerous marginal setae in two rows and its long flagellate dorsal setae, each mostly 40–80 µm long, that are longer than the dorsal setae of all other Macaranga coccids. Although adult females of C. pseudotumuliferus and C. tumuliferus group can have marginal setae in two rows, these two species have very short dorsal setae, each of about the same length as the diameter of its setal socket. In addition, in C. lambirensis , each dorsal areolation (clear area with microduct at centre) is situated on an irregularly shaped polygonal area with the abutting polygonal areas giving a cellular appearance to the derm, whereas in other species of Coccus from Macaranga the dorsal areolations are situated on uniform derm. Although molecular data placed C. lambirensis as sister to a specimen (SPQ.392 from Siduk in West Kalimantan) identified as C. near macarangicolus , it differs from that specimen and the examined syntype of C. macarangicolus (from Kuala Lumpur) in the length and shape of its dorsal setae as well as in the number of marginal setae (one row in C. macarangicolus ). An unidentified adult female from Poring in Sabah (B. Fiala No. 30a) is similar to C. lambirensis in having a double marginal row of setae but its dorsal setae are shorter and slightly more robust and it has more than 30 preopercular pores anterior to the anal plates. The single adult female most similar to the holotype of C. lambirensis is from Panga in Thailand (probably Phang Nga province) on Xylocarpus granatum (Meliaceae) , collected 8 March 2006 by Numakura and sent to TK. The latter unidentified specimen has similar dorsal and marginal setae to the holotype of C. lambirensis , with 45–57 marginal setae between the anterior and posterior stigmatic furrows on each side of body, but has more than 30 preopercular pores anterior to the anal plates. It is possible that Macaranga is not the usual host-plant genus of C. lambirensi s.

Figures

FIGURE 6. Adult female of Coccus lambirensis Gullan & Kondo sp. n. Abbreviations as in Fig. 3.