Schusteria marina, Pfingstl & Lienhard, 2017

Schusteria marina View in CoL 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 View Materials ; 3 females, NHMW 28631 View Materials ) , 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 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 View Figure 1 (c)), lateral and ventral setae slightly pectinate. Cheliceral mobile digit darker sclerotized; distinct teeth all interlocking ( Figure 1 View 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 View 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 View 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 View 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 View 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 View 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 View Table 1 .