Revision of the genus Minutaleyrodes Jesudasan and David (Hemiptera: Aleyrodidae) with descriptions of two new species from the Little Andaman Island, India
Author
Dubey, Anil Kumar
text
Zootaxa
2020
2020-03-06
4748
2
315
333
journal article
10.11646/zootaxa.4748.2.5
9a058e52-8778-42c8-9430-befa9a7e2a9d
1175-5326
3698828
A1274383-553B-4311-8F18-799505BA0201
Minutaleyrodes andamanensis
sp. nov.
(
Figs 2, 3
,
6–23
)
Puparium.
In life, white, silver shiny, wax deposited at anterior end, cephalic and metathoracic region, median and broader abdominal area (
Fig. 2
); constricted from prothoracic region to cephalic margin and from abdominal segment VII to caudal margin (
Figs 3
,
6
,
9
); female puparia
600–650 µm
long,
450–520 µm
wide; male puparia
560–580 µm
long,
425–450 µm
wide; found singly, on lower surface of leaves; only one puparium found per leaf.
Margin.
Smooth (
Figs 7
,
14
); thoracic tracheal pore indicated as small C-shaped invagination, caudal tracheal pore deeply invaginated.
FIGURE 2–5.
Habitus and holotype: 2,
M
.
andamanensis
sp. nov.
, habitus; 3, same, holotype; 4,
M
.
whisper
sp. nov.
, habitus; 5, same, holotype.
Dorsum.
Submargin with a row of conical papillae, prominent on cephalic and abdominal submargin (
Figs 7
,
12, 13
), papillae slightly broader on abdomen. Row of 7 pairs of minute setae on submargin: 2 pairs on prothorax, 1 pair on metathorax, 1 pair on each abdominal segment II and VII, and 2 pairs on caudal area. The shape of these setae varies considerably, being capitate or blunt or swollen (deformed) in middle (
Figs 17–20
). Longitudinal moulting suture reaching margin and transverse moulting suture reaching submedian area. Cephalus and metathorax each with 1 pair of enlarged tubercles present submedially (
Figs 3
,
10
), distorted when slide-mounted and appearing as if composed of concentric loops (
Fig. 3
). Microtubercles present in small groups on submedian area of prothorax, mesothorax and abdominal segments I–VII (
Fig. 10
), and transverse groups on the posterior margin of the abdominal segment sutures (
Figs 9, 10
). Cephalothorax medially longer than the abdomen; female cephalothorax and abdomen
310–325 µm
and
300–325 µm
long, respectively; male cephalothorax and abdomen
295–300 µm
and
265–275 µm
, respectively. Abdominal segments I–VIII median length (A1–A8): A1: 32–33, A2: 27–28, A3: 25–26, A4: 25–26, A5: 25–26, A6: 25–26, A7: 22–23, A8:
27 µm
. Median tubercles present on abdominal segments, prominent on segments III–VI (
Fig. 10
). Thoracic tracheal furrows absent; caudal tracheal furrow present; caudal ridges strongly rugose, terminating at submargin, apically with 1 pair of submarginal caudal setae (
Fig. 11
), furrow
37–43 µm
long. Geminate pores present (
Fig. 16
); pore-porette centers separated by width of large pore (
Fig. 16
).
Vasiform orifice.
Elongate-subcordate (
Fig. 15
); posterior end open, orifice floor with numerous finger-like microtrichia (
Figs 8
,
15
);
35–43 µm
long,
35–38 µm
wide in female;
30–37 µm
long,
35–37 µm
wide in male; operculum sub-quadrate, apically blunt (= apical border straight), apical margin with tuft of microtrichia, almost covering the orifice (sub-occludes orifice) (
Figs 8
,
15
),
25–30 µm
long,
27–30 µm
wide in female;
22–28 µm
long,
22–25 µm
wide in male.
FIGURES 6–8.
Line drawings, holotype,
M
.
andamanensis
sp. nov.
, 6, puparium; 7, margin; 8, posterior abdominal area (drawn from SEM image) (SMS—submarginal seta).
FIGURES 9–15.
SEM microphotographs,
M
.
andamanensis
sp. nov.
, 9, puparium, dorsal view; 10, posterior abdominal area; 11, vasiform orifice and caudal furrow; 12, submarginal papillae; 13, margin; 14, same; 15, vasiform orifice.
FIGURES 16–23.
SEM microphotographs,
M
.
andamanensis
sp. nov.
, 16, geminate pore; 17–20, submarginal seta; 17, capitate; 18, deformed; 19, blunt; 20, blunt; 21–23, ventral view; 21, puparium; 22, cephalothoracic legs, margin; 23, thoracic tracheal fold.
Venter.
Smooth (
Fig. 21
), granular on subventral area; submarginal area not differentiated by a fold, submarginal area with a series of small lines (
Figs 22, 23
). Submargin indicated by linear striations perpendicular to margin, submarginal fold absent. Thoracic (
Fig. 22
) and caudal tracheal folds indicated with fine granules; 1 pair of ventral abdominal setae present. Adhesive sacs and spiracles present.
Chaetotaxy.
Cephalic setae present on large tubercle,
7 µm
long. Eighth abdominal setae anterior to the base of vasiform orifice, apically blunt or slightly capitate,
7 µm
long. Caudal setae on caudal ridge,
9 µm
long. First abdominal setae absent. Submargin with 7 pairs of minute setae,
7–9 µm
long.
Material examined:
Holotype
,
India
:
Andaman and Nicobar Islands
,
Little Andaman
,
Whisper
waterfall trail, one puparium on slide,
on
Aporosa octandra
,
13.ix.2018
,
A.K. Dubey
(
ZSI
).
Paratypes
.
Six puparia on six slides, data same as of
holotype
(
NFIC-FRI 1
)
.
Host plant.
Phyllanthaceae
:
Aporosa octandra
(Buch.-Ham. Ex D. Don) Vickery.
Etymology.
The new species is named after the collection locality in Andaman Islands, Little Andaman.
Distribution.
India
:
Andaman and Nicobar Islands
, Little Andaman.
Remarks.
The pronounced marginal constriction in the thoracic and posterior abdominal areas, greatly enlarged cephalic tubercles, submarginal row of setae, submarginal papillae and ventral surface of the vasiform orifice invested with elongate microtrichia, and ventral submarginal striations, distinguish this species from all other
Minutaleyrodes
species (
Fig. 23
).