Holoparasitus floriformis, Ilinca Juvara-Bals, 2017

Ilinca Juvara-Bals, 2017, New and rare species of Holoparasitus Oudemans, 1936 (Acari, Gamasida, Parasitidae) from the Athias-Henriot Collection, Revue suisse de Zoologie 124 (2), pp. 225-239 : 235-239

publication ID

https://doi.org/ 10.5281/zenodo.893509

DOI

https://doi.org/10.5281/zenodo.5998990

persistent identifier

https://treatment.plazi.org/id/D5518791-DC66-FFE2-15D8-FB6CA4BEE754

treatment provided by

Plazi

scientific name

Holoparasitus floriformis
status

sp. nov.

Holoparasitus floriformis sp. nov.

Figs 7- 8 View Fig 7 View Fig 8

Holotype: slide D768 in MHNG arthropoda collection; male; Spain, Roncesvalles, Prov. Navarra, road towards Burguete (the Pyrenees), litter of beech forest, alt. 949 m; 5.08.1955 (Sp. 429).

Paratypes: 4 females; same data as for holotype.

Diagnosis: Long corniculi of male reaching level of seta v2, movable digit of the chelicera stout and with an axe-shaped apex; femur of leg II with a long, curved femoral apophysis and with a big, oval axillary process. Presternal plate of female without denticles; epigynium very long h/b = 1; endogynium a sack with its opening surrounded with petal-like structures.

Etymology: The species names refers to the unique flower-shape (Latin: flos = flower) of the endogynium.

Description of male: Sclerocuticle of dorsal idiosoma with a simple reticulation, colour yellowish brown. Setae simple, their length on opisthonotum 12-15. Length of peritrematal shield 220.

Ventral idiosoma: Genital lamina with rounded angles; central prong absent ( Fig. 7D View Fig 7 ). Sclerocuticle reticulated, without strongly procurved line or excipulum. All setae simple. Gland pore gv1 and gv2 simple. Eight pairs of setae on opisthogaster, their length about 24.

Gnathosoma: Gnathotectum trispinate ( Fig. 8H View Fig 8 ). Corniculi straight and long (48 long), reaching setae v2, with a small protuberance at their base ( Fig. 7C View Fig 7 ). Length of simple hypognathal setae: hyp.1 = 36, hyp.2 = 30, hyp.3 = 24, pc. = 42. Palptrochanter with pilose v2 and simple v1. Chelicera ( Fig. 7 View Fig 7 A-B): movable digit large (84 long), its apex like a sharp axe and its inner margin denticulate; fixed digit with slightly curved apex and its inner margin with 1 denticle above pilus dentilis and 3 below it.

Legs: Armature of leg II as shown in Fig. 7 View Fig 7 E-F: long, curved femoral apophysis and large, oval axillary process; rounded apophysis situated on distal margin of genual segment; tibia with two apophyses, one triangular the other elliptical, both situated medially. Measurements: tarsus I = 163; tarsus IV = 156.

Description of female: Idiosoma well sclerotized, colour yellowish brown. All setae simple, length of podonotal setae: j1 = 36, s1 = 18, others 24; length of

opisthonotal setae 12-18. Length of peritrematal shield about 230.

Ventral idiosoma: ( Fig. 8 View Fig 8 A-B). Presternal plate ribbonlike, without denticles. Sternal shield reticulated; length of sternal setae: st1 = 48, st2 = 42, st3 = 54. Gland pore gv1 situated medially on posterior margin ( Fig. 8A View Fig 8 ). Paragynial shield reticulated, stretched out around lateral margin of epigynium; posterior paragynial protrusion small and rounded; metagynial sclerite elliptical ( Fig. 8B View Fig 8 ). Epigynium as long as its width at base. Apex elongated, anteriorly with a triangular apex and a slightly sclerotized subapical structure ( Fig. 8C View Fig 8 ). Setae st5 short (20-24). Endogynium a big sack with its opening surrounded by structures shaped like petals, all covered by a thin membrane with a denticulate anterior margin ( Fig. 8 View Fig 8 D- E). Gland pore gv2 simple. Opisthogaster with 8-9 pairs of setae, their length: ZV4 = 30, JV5 = 18, others 24-30. Measurements: distance between sternal setae: st1-st1’ = 72, st2-st2’ = 96, st3-st3’ = 110-132; height of sternal shield = 36; epigynium: height = 187- 192, basal width = 180-192, h/b = 1-1.10;

Gnathosoma: Gnathotectum trispinate ( Fig. 8G View Fig 8 ). Corniculi conical. Hypognathal groove with 9-10 rows, most of them oligodent; hypostomatic setae simple, their length hyp.1, hyp.2 = 30; hyp.3 = 24; pc. = 42 ( Fig. 8F View Fig 8 ). Movable and fixed digit of chelicera 84 long.

Legs: Coxa II with a ridge of 8 denticles ( Fig. 7G View Fig 7 ). Length of tarsus I = 150-156 and tarsus IV = 156-161.

Remarks: The new species can be easily distinguished from all the known species of Holoparasitus by the particular characteristics of the endo- and epigynium of the female and by those of the chelicera of the male.

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