Minteracarus mombasa, Stekolnikov, 2022

Stekolnikov, Alexandr A., 2022, A new genus and species of bat chiggers (Acariformes: Trombiculidae) from Kenya, Acarologia 62 (2), pp. 418-425 : 420-423

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 ; 1 posthumeral row (C excluding humeral setae) triple, with 35 – 41 setae; 2 nd posthumeral row (D) double, sometimes triple in

)

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

– 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,

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.

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.

Figures

Figure 1 Minteracarus mombasa n. sp., holotype: A – arrangement of dorsal idiosomal setae; B – arrangement of ventral idiosomal setae; C

Figure 2 Minteracarus mombasa n. sp.: A – scutum (holotype); B – ventral aspect of gnathosoma (paratype L:7263/2); C – dorsal aspect