A new genus and species of bat chiggers (Acariformes: Trombiculidae) from Kenya
Author
Stekolnikov, Alexandr A.
Laboratory of Parasitic Arthropods, Zoological Institute of the Russian Academy of Sciences,
text
Acarologia
2022
2022-04-13
62
2
418
425
https://www1.montpellier.inrae.fr/CBGP/acarologia/article.php?id=4520
journal article
10.24349/5n37-k5b9
2107-7207
7160442
MINteracarus mombasa
n. sp.
Zoobank:
969EC25B-FAA0-4F94-B996-7C0E8F97E9BF
(
Figures 1
,
2
)
Grandjeana
(?)
mombasa
(
nomen nudum
): Stekolnikov 2019: 36.
Diagnosis
SIF = 5B1N-N-2-3111.0000; fCx = 1.1.1; fSt = 2.2; fPp = B/B/NBB; DS = 100 – 119, V = 63
– 81, NDV = 166 – 194; Ip = 681 – 763; PL ≥ AM ≥ AL; eyes absent; scutum bell-shaped,
with moderate puncta, with prominent anterolateral shoulders; PLs situated off scutum; sensilla flagelliform, with 3 – 4 long branches in distal half. Measurements given in
Tables 1
and
2
.
Description of larva
Idiosoma
— (
Figure 1
) — Slightly contracted medially in engorged specimens; eyes absent; two pairs of humeral setae densely covered with long barbs
st
; 1posthumeral row (C excluding humeral setae) triple, with 35 – 41 setae; 2
nd
posthumeral row (D) double, sometimes triple in
Table 1
Morphometric (AW – TaIIIW, µm) and meristic (DS – NDV) traits of
Minteracarus mombasa
n. sp.
(N = 7). Abbreviations: AW – distance between anterolateral scutal setae; PW – distance between posterolateral scutal setae; SB – distance between sensillary (trichobothrial
)
bases; ASB – distance from the level of sensillary bases to extreme anterior margin of scutum; PSB – distance from the level of sensillary bases to extreme posterior margin of scutum; SD – length of scutum (ASB + PSB); AP – distance between antero- and posterolateral scutal seta on one side;
AM
– length of anteromedian scutal seta; AL – length of anterolateral scutal setae;
PL
– length of posterolateral scutal setae; S length of sensilla (trichobothria); H – length of humeral setae
min
; D– length of the shortest dorsal idiosomal seta
max
; D – length of the longest dorsal idiosomal seta;
V
min
– length of the shortest ventral idiosomal seta;
max
V
– length of the longest ventral idiosomal seta; pa – length of leg
–
I (including coxa, excluding claws); pm – length of leg II (including coxa, excluding claws); pp – length of leg III (including coxa, excluding claws); Ip – sum of leg lengths (pa + pm + pp); TaIIIL – length of leg tarsus III; TaIIIW – width of leg tarsus III; DS – number of dorsal idiosomal setae (excluding scutal);
V
– number of ventral idiosomal setae (excluding coxal and sternal); NDV = DS +
V
.
Range Mean
Holotype
Range Mean
Holotype
AW 40-46 42 41
Dmin
21-24 22 23
PW 77-106 87 87
Dmax
32-38 36 32
SB 16-20 18 18
Vmin
18-24 22 23
ASB 24-28 26 28
Vmax
26-31 29 29
PSB 15-17 16 17 pa 246-278 268 277
SD 40-44 43 44 pm 211-237 225 237
AP 29-41 34 33 pp 223-251 242 249
AM 32-37 35 37 Ip 681-763 735 763
AL 31-39 35 31 TaIIIL 63-75 69 73
PL 34-37 36 37 TaIIIW 15-17 16 15
S 60-60 60 60 DS 100-119 109 113
H 41-43 42 43 V 63-81 71 66
NDV 166-194 179 179
Figure 1
Minteracarus mombasa
n. sp.
, holotype: A – arrangement of dorsal idiosomal setae; B – arrangement of ventral idiosomal setae; C
– humeral seta; D – dorsal idiosomal seta of
st
1posthumeral row (C); E – preanal seta. Abbreviations: H – humeral setae; u – uropore (anus);
V – ventral idiosomal setae. Borders between rows showed by dotted lines. Scale bars: A, B – 100 µm; C – E – 50 µm.
medial part, with 23 – 30 setae; distribution of other 36 – 47 setae by rows unclear; 1
st
and 2
nd
rows clearly isolated from each other and from posterior setae; total 100 – 119 short, heavily barbed dorsal idiosomal setae; four sternal and 63 – 81 ventral idiosomal setae, NDV = 166 – 194.
Gnathosoma
— (
Figure 2B, C
) — Cheliceral base with sparse puncta; cheliceral blade with tricuspid cap; gnathobase (infracapitulum) with sparse puncta and one pair of branched,
Table 2
Minteracarus mombasa
n. sp.
, lengths of specialized leg setae, µm (N = 4).
| Range |
Mean |
|
Tarsala I (
ω
)
|
20-22 |
21 |
|
Tarsala II (
ω
)
|
18-18 |
18 |
|
Distal tibiala I (
φ
)
|
23-27 |
25.5 |
|
Proximal tibiala I (
φ
)
|
22-22 |
22 |
|
Microtibiala (
κ
)
|
8-11 |
9.5 |
|
Microgenuala (
κ
)
|
8-8 |
8 |
|
Lateral genuala I (
σ
)
|
19-19 |
19 |
Figure 2
Minteracarus mombasa
n. sp.
: A – scutum (holotype); B – ventral aspect of gnathosoma (paratype L:7263/2); C – dorsal aspect
of gnathosoma (
paratype
L:7263/2); D – genu, tibia, and tarsus of leg II (
holotype
); E – genu, tibia, and tarsus of leg I (
holotype
); F – genu tibia, and tarsus of leg III (
holotype
). Abbreviations: AL – anterolateral scutal seta;
AM
– anteromedian scutal seta; Cb – cheliceral base; Cs cheliceral blade;
1
f –famulus I (
ε
); f
2
– famulus II (
ε
); Ga – galeal (deutorostral) seta; ga – genuala I
σ
(); gm – genuala II
σ
(); gns – gnathocoxal (tritorostral) seta; gp – genuala III
σ
(); ic – infracapitulum (gnathobase, gnathocoxa); µga – microgenuala
κ
I);(µta – microtibiala I (
κ
); PC – palpal claw (odontus); PF – palpal femur; PG – palpal genu;
PL
– posterolateral scutal seta; pST – parasubterminala
z
(); PT
′
– pretarsala I (
ζ
);
–
PT
″
– pretarsala II (
ζ
); PTa – palpal tarsus; PTi – palpal tibia; S – sensillum (trichobothrium);
0
S – palpal tarsala (
ω
); S
1
– leg tarsala I (
ω
); S
2
– leg tarsala II (
ω
); ST – subterminala (
ζ
); ta – tibiala I (
φ
); tm – tibiala II (
φ
); tp – tibiala III (
φ
). Scale bars: A – 50 µm; B, C – 20 µm; D – F
– 50 µm.
Figure 3
Microscope slide with the holotype of
Minteracarus mombasa
n. sp
.
gnathocoxal (tritorostral) setae; galeal (deutorostral) seta thick and nude; palpal claw (odontus) slender, with two short subequal prongs; palpal femur with few puncta and strong branched seta; palpal genu with branched seta; dorsal palpal tibial seta nude, lateral and ventral palpal tibial setae branched; palpal tarsus with 6 non-specialized setae, including 1 very thick, heavily barbed dorsal seta and 5 thin setae (4 bearing few branches and 1 nude), and long curved basal tarsala (
ω
).
Scutum
— (
Figure 2A
) — Small, bell-shaped, with moderate puncta, with prominent anterolateral shoulders; anterior scutal margin sinuous, lateral margins with superimposed cuticular striations, posterior margin rounded; AM at level of ALs; PLs situated off scutum; all scutal setae covered with strong pointed barbs; sensilla flagelliform, with 3 – 4 long branches in distal half; arched crests present anterior to sensillary bases.
Legs
— (
Figure 2D – F
) — All 7-segmented (with divided femur), with 1 pair of claws and claw-like empodium. Leg I: coxa with 1 branched setae (1B); trochanter 1B; basifemur 1B; telofemur 5B; genu 4B, 3 genualae (
σ
), long setiform microgenuala
κ
(); tibia 8B, 2 very long, curved, striated tibialae
φ
(), long setiform microtibiala (
κ
); tarsus 21B, tarsala (
ω
), famulus (
ε
) distal to tarsala, subterminala (
ζ
), nude parasubterminala (
z
), pretarsala (
ζ
). Leg II: coxa 1B; trochanter 1B; basifemur 2B; telofemur 4B; genu 3B, genuala
σ
(); tibia 6B, 2 tibialae (
φ
) in tandem; tarsus 16B, tarsala II (
ω
), famulus (
ε
) near and slightly proximal to tarsala, pretarsala
(
ζ
). Leg III: coxa 1B; trochanter 1B; basifemur 2B; telofemur 3B; genu 3B, genuala
σ
(); tibia
6B, tibiala (
φ
); tarsus 14B.