Schusteria marina Pfingstl & Lienhard, 2017, sp. nov.
Creators: name: Pfingstl, Tobias
name: Lienhard, Andrea
Publisher: name: Zenodo
Year: 2017
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Arachnida
Sarcoptiformes
Selenoribatidae
Schusteria
Schusteria marina

description: Schusteria marina sp. nov.
Type material
Holotype (preserved in ethanol): female, Sainte-Anne, Martinique, Pointe Marin. Deposited in the collections of the Senckenberg Museum für Naturkunde Görlitz (SMNG) (collection number. DNR 56570). Paratypes (preserved in ethanol): same locality as holotype, 4 Paratypes from same sample, deposited at the Naturhistorisches Museum Wien/NHM Vienna (1 male, NHMW 28630; 3 females, NHMW 28631), additional specimens in the collections of the Institute of Zoology, University of Graz.
Etymology
The specific name is derived from the Latin adjective “ marina ” which means belonging to the sea. It refers to the marine association of this species and additionally it refers indirectly to the type locality “ Pointe Marin ” on Martinique.
Diagnosis
Cerotegument overall finely granular. Prodorsal ridges absent. Sensilli very short. Dorsosejugal suture incomplete. Clear-spot present on anterior part of notogaster. Faint epimeral ridges present. Slight median sternal ridge present on epimeron I.
Description of adult
The new species shows all familial and generic traits given by Grandjean (1968).
Females (N = 5), length: 376 – 394 μm (mean 382 μm), width: 246 – 259 μm (mean 250 μm); males (N = 3), length: 357 – 381 μm (mean 368 μm), width: 225 – 252 μm (mean 240 μm).
Integument
Colour dark brown.
Prodorsum
Cerotegument finely granular. Rostrum rounded in dorsal view, slightly projecting anteroventrally in lateral view (Figure 2 (a,c)). Rostrum demarcated from remainder of prodorsum by faint transverse ridge. Lamellar ridges completely absent. Rostral seta (ro) setiform, smooth (approx. 15 µm). Lamellar seta (le) setiform and smooth (approx. 12 µm), bent caudally. Interlamellar seta (in) setiform (approx. 12 µm), exobothridial seta (ex) minute. Bothridium large cup, with lateral incision. Sensillus short (approx. 23 µm), slightly curved caudally, clavate, and distally covered with fine conspicuous spines.
Gnathosoma
Palp pentamerous, setation 0-2-1-3-8 (solenidion not included) (Figure 1 (c)), lateral and ventral setae slightly pectinate. Cheliceral mobile digit darker sclerotized; distinct teeth all interlocking (Figure 1 (a)). Seta cha (approx. 35 µm) and chb (approx. 25 µm) both robust and pectinate. Gena well sclerotized. Distal part of rutellum developed as thin triangular membrane, slightly curved inward with longitudinal incision (Figure 1 (b)). Seta a and m long (approx. 25 µm), robust, and smooth. Mentum regular, seta h setiform, thin (approx. 30 µm).
Notogaster (Figure 2 (a))
Rounded, slightly pear-shaped in dorsal view, convex in lateral view. Dorsosejugal suture incomplete, medially clearly interrupted. Cerotegument finely granular. Lighter, less sclerotized area on most anterior part of notogaster, edges variable, and poorly defined. Fifteen pairs of setiform, smooth notogastral setae (20 – 25 µm), c 1 – 3, da, dm, dp, la, lm, lp, h 1 – 3, p 1 – 3. Lyrifissure ia lateral and slightly anterior to seta c 2; im slightly anterior of seta la; ih lateral and anterior to h 3; lyrifissure ip lateral to seta p 2 and ips anterior to seta p 3. Orifice of opisthonotal gland (gla) between setae la and lm.
Lateral aspect (Figure 2 (c))
Cerotegument finely granular, larger granules in lateral sejugal area and in areas surrounding acetabula. Pedotectum I small, rounded. Pedotectum II absent. Discidium (di) developed as prominent triangular bulge. Next to bothridium small rounded cuticular ridge passing into faint lateral ridge reaching orifice of coxal gland II z. Opening of coxal gland on small, distinct triangular projection. Another small, but opposing triangular projection above leg II.
Ventral region of idiosoma (Figure 2 (b))
Cerotegument finely granular. Epimeral setation 1-0-1-1, all setae setiform and smooth. Setae 1b longest (approx. 47 µm), others short (approx. 10 µm). Internal borders of epimera I – III well visible. With a pair of parallel longitudinal small ridges reaching from camerostome to middle of epimeron I and an unpaired longitudinal darker sclerotized sternal small ridge in the middle of epimeron I. Genital and anal opening adjacent, both surrounded by slightly darker cuticle. Rounded genital plates with three pairs of equidistant fine, short filiform setae (approx. 6 µm) arranged in a longitudinal row; first two pairs closer together. Tendon β well visible as dark dot lateral to genital orifice. Aggenital setae absent. Anal valves trapezoidal. Preanal organ rectangular with rounded edges. Three pairs of short adanal setae, ad 1 – 3 (approx. 15 µm). One pair of short anal setae an 1 (approx. 10 µm) inserting on anterior half of anal valves. Lyrifissure iad transversely aligned, adjacent to anterior corners of anal opening.
Legs (Figure 3). Long, broad claws with one proximoventral tooth. Cerotegument granular from trochanter to genu, finer granules from tibia to tarsus. Ventral carina present on all femora. Porose areas not discernible. Femoral dorsal setae and most tarsal setae strongly barbed. For chaetome and solenidia, see Table 1.
description: Published as part of Pfingstl, Tobias & Lienhard, Andrea, 2017, Schusteria marina sp. nov. (Acari, Oribatida, Selenoribatidae) an intertidal mite from Caribbean coasts, with remarks on taxonomy, biogeography, and ecology, pp. 462-467 in International Journal of Acarology 43 (6) on pages 462-464, DOI: 10.1080/01647954.2017.1348393, http://zenodo.org/record/15358701