Bryobia (Lyobia) hadizeni, Barbar & Parker & Auger, 2022

Barbar, Ziad, Parker, Bruce & Auger, Philippe, 2022, Tenuipalpidae and Tetranychidae (Trombidiformes, Tetranychoidea) from Syria with a description of a new species of Bryobia, Acarologia 62 (1), pp. 58-67 : 60-66

Bryobia (Lyobia) hadizeni sp. nov.

Zoobank: D3FFBD1F-B949-4193-AFC5-6C04222CCB0A

Figures 1–5

Type material — Holotype (female) and three female paratypes from Calicotome villosa (Poir.) Link. (Leguminosae) , Alhafah (35°60′21″ N, 36°11′50″ E), Latakia governorate, Syria,

20 April 2021, coll. Z. Barbar. Material has been deposited in the Arthropod Collection of the Department of Plant Protection, Faculty of Agriculture, Albaath University, Homs, Syria.

Diagnosis — This species belongs to the berlesei -group due to prodosomal lobes well developed, no duplex setae on tarsus IV and femoral interior dorsal row with four long setae ( Eyndhoven and Vacante, 1985). Prodorsum with two large oval-shaped lateral depressions. Opisthosoma bearing 6 large oval-shaped depressions with elongate ribbon-shaped pattern and one triangularly rounded depression caudally. Dorsal body setae serrate spatulate, except f 2

and h 1 elongate, acute distally, f 2 and h 1 longest. Dorsocentral setae of each row with members close to each other. Femora and genua II-IV with some flattened setae.

Female description — 625 (605–616 µm) long including lobes (base of setae v 1) and 391 (381–383) wide, gnathosoma 95 (75–110) long. Distances between sc 2 – sc 2 325 (294–320) and between v 2 – h 1 614 (598–600).

Dorsum – Prodorsum with four pairs of setae, with rounded, oval and elongate reticulation medially surrounded by granulation, with two large oval-shaped lateral depressions containing irregular folds forming oval patterns ( Figures 1 and 2A ); well-developed anterior prodorsal lobes, inner lobes conical measuring 53 (50–52) high (excluding setae), separated by wide V-shaped incision 31 (15–21) in depth (measured from the bottom of the incision between the of prodorsum; B and C – setae c 1 ; D and E – setae e 1 and h 1, respectively. Scale bar = 50 μm.

inner lobes to their tip, excluding setae) ( Figure 2A ); outer propodosomal lobes subtriangular to conical 35 (32–33) high (excluding setae); tip of setae v 2 slightly surpasses setae v 1 insertions; setae v 1 shorter than setae v 2. Distance between members of first (v 1) and second (v 2) pair of propodosomal setae insertions 28 (28) and 103 (98), respectively. Opisthosoma with six large oval-shaped depressions containing elongate ribbon-shaped reticulations (3 pairs posterolateral to setae c 1, d 1 and e 1 and one triangularly rounded caudally; Figure 1 ) and with large mostly transverse folds medially. Dorsal body setae serrate spatulate, except e 3 and f 1 subspatulate, f 2 and h 1 elongate, narrower, acute distally; setae v 1 the shortest, f 2 and h 1 the longest. Among dorsocentral setae, c 1 larger and less spatulate than setae d 1 and e 1 ( Figure 1 and 2B, D and E ) except in one specimen ( Figure 2C ). All dorsal setae inserted on obvious tubercles (those of

f 1, f 2 and h 1 the biggest). Measurements of dorsal setae: v 1 27 (25–26); v 2 38 (32–34); sc 1

50 (44–50); sc 2 42 (40–46); c 1 42 (35–40); c 2 40 (34–44); c 3 36 (34); d 1 34 (27–33); d 2 46 (37–42); d 3 39 (37–41); e 1 33 (25–39); e 2 44 (44–45); e 3 45 (45–52); f 1 48 (51); f 2 60 (67–69);

h 1 71 (64–72); dorsal setae width v 1 9 (8–10); v 2 14 (13–14); sc 1 11 (15–18); sc 2 11 (15–16),

c 1 15 (21–23), c 2 15 (14–18), c 3 14 (17–20), d 1 13 (17–19), d 2 13 (14–19), d 3 14 (16), e 1 15 (15–17), e 2 12 (17–18), e 3 13 (11–16), f 1 12 (10–16), f 2 10 (7–12) and h 1 9 (8–11).

Distances between setae: c 1 – c 1 40 (40–45), d 1 – d 1 40 (33–42), e 1 – e 1 22 (22–30), f 1 – f 1 155 (135–140), f 2 – f 2 76 (75), h 1 – h 1 15 (18–20), c 1 – d 1 105 (98–104), d 1 – e 1 90 (85–92).

Gnathosoma – Stylophore slightly notched anteriorly, 92 (90–101) long and 73 (74–78) wide. Tibial claw of palpus bidentate ( Figure 3A ). Palptarsus slightly longer (excluding setae) 18 (19–18) than tibial claw 15 (15–16), with three tactile setae, three eupathidia and one solenidion, the shortest ( Figure 3A ). Tip of tibial claw reaches insertion of proximal tarsal tactile seta “a”. Peritreme anastomosed distally, elongate, 33 (27–32) long 7 (9–8) wide ( Figure 3B ).

Venter – Area immediately anterior to genital flap irregularly longitudinal. Three pairs of pseudanal setae (ps 1-3) and two pairs of ventrocaudal setae (h 2-3) present. Sacculus of

C

(A and B), 20 μm C and D.

spermatheca elongate 23 (20) long 8 (10) wide ( Figure 3C ).

Legs – ( Figures 4 and 5 ). Internal dorsal row of femur I with 4 long serrate setae 53 (50–55) and one normal seta 28 (27–30). Leg I 536 (528–541) long, leg II 340 (322–333), leg III

333 (315–322), leg IV 400 (396–430). Length of segments of leg I as follows: trochanter

45 (42–50), femur 156 (142–160), genu 75 (67–75), tibia 108 (104–112), tarsus 86 (83–86). Femora and genua II-IV with some flattened setae. Leg setal counts as follows ( Figure 4 ):

I: 2 – 1 – 12[13] – 6 – 13 + (1) – 18 + (4) + 2 duplexes

II: 1 – 1 – 10[9] – 5 – 9 – 16 + (1) + 1 duplex

III: 1 − 1 − 7 – 6 – 9 –13 + 1 duplex

IV: 1 – 1 – 6 – 5[6] – 9 − 14 + (1)

True claws uncinate. Claw and empodium I with one and three pairs of tenent hairs, respectively ( Figure 5A ). Claws II-IV each with three pairs of tenent hairs and empodia II-IV consist of two rows of tenent hairs ( Figure 5B ). Tarsus III associated tactile seta 21 (20–20) and solenidion 15 (15–20) forming duplex ( Figure 5C ); on tarsus IV solenidion 7 (8–10) shorter and proximal, well-separated (7) from tactile seta 22 (20–20) ( Figure 5D ). Coxisternal setae 1b and 1c smooth: 1b, 54 (53–60), longer than setae 1c 33 (33–40).

Etymology — The name of the new species “ hadizeni ” is composed of the first names of Hadi and Zen, sons of the first author, to whom the new species is dedicated.

Remarks — Bryobia (L.) hadizeni sp. nov. is very close to B. (L.) cooremani Eyndhoven and Vacante (1985) , but this new species differs from it by (1) having obvious large dimples on idiosoma vs. absent in B. (L.) cooremani (2) having setae f 2 elongate, subspatulate and longer (60–69), and h 1 elongate, narrow, acute distally and longer (64–72) vs. elongate spatulate:

f 2 30–50, h 1 30–47 in B. (L.) cooremani ; (3) having longer seta c 1 35–42 vs. 22–33 in B. (L.) cooremani ; (4) having distances between c 1 – c 1 40–45, d 1 – d 1 33–42, e 1 – e 1 22–30 shorter vs. c 1 – c 1 72–90, d 1 – d 1 55–70, e 1 – e 1 33–50 in B. (L.) cooremani ; (5) having longer setae in the internal femoral upper row of leg I: 50–55 long vs. about 40 in B. (L.) cooremani ; (6) having some flattened setae on femora and genua II-IV vs. all legs with normal setae in B. (L.) cooremani . Bryobia (L.) hadizeni sp. nov. is easily separated from B. (L.) pelerentsi Eyndhoven and Vacante (1985) previously recorded from C. villosa by: (1) the lack of obvious large dimples on idiosoma in B. (L.) pelerentsi which also have a narrower body (300–320 µm); (2) differences in the shape of several dorsal setae: c 1 shell-like vs. spatulate elongate, f 1 and

f 2 spatulate wide vs. elongate subspatulate and h 1 elongate spatulate vs. elongate narrow and acute distally in B. (L.) pelerentsi and B. (L.) hadizeni sp. nov., respectively; (3) a different ratio between palptarsus and thumbclaw about 1.5 in B. (L.) pelerentsi vs. subequal in length in B. (L.) hadizeni sp. nov. ; (4) having three pairs of tenent hairs on empodium I vs. two pairs in B. (L.) pelerentsi .

Figures

Figure 1 Bryobia hadizenin. sp, female, dorsal aspect. Scale bar = 100 μm.

Figure 2 Bryobia hadizenin. sp, female: A – propodosomal lobes and detail of granulated integument

Figure 3 Bryobia hadizenin. sp, female: A – palpal tibia and tarsus; B – peritreme; C – spermatheca. Scale bars = 20 μm (A and C), 30 μm B.

Figure 4 Bryobia hadizenin. sp, female legs (from femur to tarsus): A, B, C, and D – legs I, II; III and IV, respectively. Scale bar = 100 μm.

Figure 5 Bryobia hadizenin. sp, female: A – claw and empodium I; B – claw and empodium II; C – duplex setae on tarsus III; D – solenidion and associated tactile seta on tarsus IV. Scale bars = 10 μm