Pontoppidania pontica ( Volgin et Shchur, 1974 )

Maslov, S. I., 2014, A Redescription Of Pontoppidania Pontica (Acari, Astigmatina, Acaridae) Inhabiting Algal Debris On Seashores Of Black And Azov Seas Of Crimea (Ukraine), Vestnik Zoologii 48 (2), pp. 167-172 : 167-172

Pontoppidania pontica ( Volgin et Shchur, 1974) ( fig. 1–6 )

Phycoditum ponticus Volgin et Shchur, 1974: 79 , fig. a, b.

M a t e r i a l s t u d i e d. Ukraine: Crimea: Yalta, “Cape Martyan” Nature Reserve , algal debris on seashore of Black Sea, 40°30ʹ N, 34°16ʹ E, 4.11.2011, 28 ♀ , 20 Ơ; “Sivash” Nature Reserve, algal debris on seashore of Sivash gulf, 45°15ʹ N, 35°05ʹ E, 5.12.2012, 14 ♀ , 10 Ơ (Maslov); Ukraine, Crimea , vicinity of settl. Kamenskoe , algal debris on seashore of Azov Sea , 45°16ʹ N, 36°31ʹ E, 5.12.2012, 2 ♀ , 2 Ơ; cape Tarkhankut, algal debris on seashore of Black Sea , 45°18ʹ N, 32°39ʹ E, 4.12.2012, 5 ♀ , 6 Ơ; “Cape Kazantip” Nature Reserve, algal debris on shore of Azov Sea , 45°28ʹ N, 36°50ʹ E, 5.12.2012 , 2 Ơ; Ukraine, Crimea, Karadag Nature Reserve , algal debris on seashore of Black Sea , 44°54ʹ N, 35°12ʹ E, 5.12.2012, 18 ♀ , 23 Ơ (Maslov).

F e m a l e ( fig. 1 –4). Idiosoma 480–530 long, maximum width 352–360.

Gnathosoma (fig. 4, 1, 2). Chelicerae (fig. 4, 2) with large median process on digitus fixus, digitus mobilis smooth. Cheliceral setae not evident. Subcapitulum almost triangular in shape, with filiform ventral setae (m) and spine-like palpal supracoxal setae (elcp). Each palp bears three filiform setae: dorsal tibial, dorsal tarsal, ventral tibial; tarsus with very small subapical solenidion.

Idiosomal dorsum ( fig. 1, 1 ). Prodorsal sclerite almost quadrangular, very poorly sclerotized, invisible in poorly sclerotized (young) mites. Podocephalic sclerites extending on lateral side of prodorsum from supracoxal setae to lateral apex of idiosoma. Grandjean’s organ at apex of podocephalic sclerite almost spine-like, barbed. The lengths of dorsal setae are highly variable, especially those of longest setae. All setae are smooth. Setae si, c 1, c 2, d 1, d 2, and e 1 always blunt-ended; setae cp and h 1 usually blunt-ended in females with relatively shorter setae and pointed in females with long setae. External vertical setae (ve) on same transverse line as internal verticals (vi). Sejugal furrow well-developed. Hysterosoma un-

Рис. 1. Pontoppidania pontica , самка: 1 — дорсальная сторона; 2 — вентральная сторона. Рис. 2. Pontoppidania pontica , самка: 1–2 — ноги I и II соответственно.

sclerotized. Idiosomal setation complete. Opisthonotal gland openings (gla) posterolateral to setae d 2. Cupules ia in the middle between setae c 2 and d 2, im laterad of opisthonotal gland. Bases of setae e 2 situated very close to bases of setae f 2. Bursa copulatrix distinct, situated on posterior margin of the body. Spermatheca as on fig. 4, 3.

Idiosomal venter ( fig. 1 , 2 ). Coxal apodemes as on fig. 1 , 2 . All ventral setae filiform. Oviporus elongate, with highly folded pseudovipositor typical of acarid mites internally. Genital papillae small, anterior genital papillae distinctly larger than posterior one. Cupules ip situated almost on the same transverse line with i h. Cupules ih anteriad to setae h.

3

The length of idiosomal setae: vi 51–73, ve 24–27, el 14–19, si 50–88, se 168–233, c 1 28– 46, c 2 39–48, cp 88–172, c 3 35–42, d 1 32–57, d 2 45–72, e 1 72–121, e 2 151–230, f 2 94–140, h 1 94–198, h 2 94–184, h 3 80–146, p 1 30–40, p 2 30–40, p 3 31–35, ad 1 18–25, ad 2 23–26, ad 3 20–23, 1 a 33–45, 3 a 30–41, 4 a 27–30, 4 b 20–23, g 25–28.

Legs ( fig. 2 , 3). All legs relatively long and thin, ventrodistal setae s, p, q, v, u short, spine-like. Chaetotaxy of legs I–IV complete. Leg I ( fig. 2 , 1 ): setae dG, mG, gT, hT, and wa barbed. Famulus ε spine-like; solenidion ω 1 c-shaped, tapering distally; the length of solenidia: ω 1 23–37, ω 2 11–15, ω 3 10–16, φ 96–132, σ ʹ 40–67, σ ʹʹ 23–42. Leg II ( fig. 2, 2 ): setae dG, mG, gT, hT, and wa barbed; solenidion ω of similar shape with ω 1 on tarsus I; the length of solenidia: ω 29–36, φ 88–130, σ 21–33. Leg III ( fig. 3, 1 ): setae nG, kT, and w barbed; the length of solenidia: φ 85–127, σ 11–16. Leg IV ( fig. 3, 2 ): setae kT and w barbed, solenidion φ 67–87 long.

Рис. 3. Pontoppidania pontica , самка: 1–2 — ноги III и IV соответственно.

M a l e ( fig. 5 , 6 ). Distinctly smaller than female, idiosoma 352–380 long, maximum width 240–264.

Gnathosoma as in female.

Idiosomal dorsum ( fig. 5 , 1 ) similar with that of female, but setae relatively shorter and less variable in length and shape. Setae si, c 1, c 2, cp, d 1, d 2, e 1 and h 1 blunt-ended.

Idiosomal venter ( fig. 5 , 2 ). Coxal apodemes as in female. Aedeagus very short, supported by arch-like structure. Genital papillae as in female, but smaller; setae p 1 – p 3 needle-like, setae h 2 blunt-ended. Setae p 3 situated just anteriad to adanal suckers. An area around setae h 2, h 3, p 1, p 2 with weak but distinct sclerotization. Adanal suckers situated near anterior end of anal opening.

The length of idiosomal setae: vi 44–46, ve 18–20, el 16–18, si 31–33, se 153–162, c 1 26–29, c 2 24–29, cp 57–65, c 3 28–33, d 1 27–31, d 2 32–33, e 1 55–56, e 2 51–57, f 2 83–95, h 1 56–57, h 2 61–78, h 3 69–72, p 1 28–30, p 2 22–28, p 3 13–15, 1 a 26–29, 3 a 22–30, 4 a 20–26, 4 b 17–24, g 22–25.

Legs ( fig. 6 ). Similar with that of female, except solenidia ω 1 on tarsus I and ω on tarsus II distinctly longer, solenidion ω 3 distinctly longer than ω 2 and situated near anterior end of the tarsus I; tarsus IV with setae d and e sucker-like, d in basal part of tarsus, e in distal. The length of solenidia on legs I–IV: leg I ( fig. 6 , 1 ): ω 1 39–44, ω 2 12–13, ω 3 21–26, φ 92–101, σ ʹ 42–52, σ ʹʹ 32–34; leg II ( fig. 6 , 2 ): ω 45–49, φ 88–92, σ 25–28; leg III ( fig. 6 , 3): φ 83–92, σ 10–11; leg IV ( fig. 6 , 4): φ 44–55.

Larva, protonymph, hetero-

m o r p h i c d e u t o n y m p h, and t r i t o -

n y m p h unknown.

R e m a r k s. In original description of

P. pontica authors did not illustrate setae

4 a ( Volgin, Shchur, 1974: fig b). By my request, Dr A. V. Bochkov studied male holotype of P. pontica deposited in the collection of Zoological Institute of RAS

(St.- Petersburg, Russia) and confirmed the presence of setae 4 a.

D i s t r i b u t i o n. Pontoppidania pontica is currently known only from Ukraine. 1

E c o l o g y. Mites inhabit algal debris on seashores of Black and Azov Seas. Fig. 4. Pontoppidania pontica , female: 1 — subca- Phoresy on insects or other arthropods is pitulum; 2 — chelicerae; 3 — spermatheca.

unknown. Рис. 4. Pontoppidania pontica , самка: 1 — субкапитулюм; 2 — хелицера; 3 — сперматека.

Below the key to world species of the genus Pontoppidania is provided 1.

Рис. 5. Pontoppidania pontica , самец: 1 — дорсальная сторона; 2 — вентральная сторона.

1 The comparison of P. littoralis and P. pontica based on unpublished original drawings of the male holotype of P. littoralis and our materials of P. pontica by Barry OConnor.

\

Рис. 6. Pontoppidania pontica , самец: 1–4 — ноги I–IV соответственно.

Figures

Fig. 1. Pontoppidania pontica, female: 1 — dorsum; 2 — venter.

Fig. 2. Pontoppidania pontica, female: 1–2 — legs I and II respectively.

Fig. 5. Pontoppidania pontica, male: 1 — dorsum; 2 — venter.

Fig. 6. Pontoppidania pontica, male: 1–4 — legs I–IV respectively.