Monatractides melpomene Pe��i�� & Smit, 2014, n. sp

Autor: Pe��i��, Vladimir, Smit, Harry
Rok vydání: 2014
Předmět:
DOI: 10.5281/zenodo.6143470
Popis: Monatractides melpomene n. sp. (Figs. 28 A���H, 37 A���B, 38 A���B, 44 B) Type series. Holotype male, dissected and slide mounted, Ghana: Amedzofe Falls, 6 �� 50.656 N, 0�� 26.868 E, alt. 599 m asl., 20.ii. 2013, Smit. Paratypes: 3 [one juvenile]/ 8 [two juveniles]/0, same data as holotype, 1 / 2 /0 dissected and slide mounted; 0/ 1 /0, unnamed creek upstream Sagyimase, Atewa Hills, 6 �� 13.966 N, 0�� 33.114 W, alt. 671 m asl., 28.ii. 2013, Smit, dissected and slide mounted. Diagnosis. Dorsal shield with colour pattern as illustrated in Figs. 37 A���B, ventral seta on P- 3 comparatively stouter than seta on P- 2, ventral setae on P- 4 slender and short, not reaching the tip of P- 5. Male: genital field with long setae at lateral and posterior margins, ejaculatory complex with small proximal chamber. Description. General features ���Idiosoma roundish; shoulder platelets elongated (shoulder/frontal platelets L ratio 1.5���1.7); dorsal shield with colour pattern as illustrated in Figs. 37 A���B, frontal margin medially with large anterolaterally pointed apodemes (Figs. 28 C, 29 B); Cxgl��� 4 located far distal at tips of Cx-I; gnathosomal bay deep, narrow U-shaped, proximally pointed, three pairs of knob-like protrusions at the lateral margins of gnathosomal bay; posterior suture line of Cx-IV distinct, originating from lateral edge of genital field; excretory pore away from the line of primary sclerotization, Vgl- 2 well posterior to excretory pore; gnathosoma compact, with long dorsal apodemes, rostrum truncated (Fig. 28 G); palp (Figs. 28 D���E, 29 C): ventral seta on P- 3 comparatively stouter than seta on P- 2; distal margin of P- 3 and P- 4 medially and laterally with several pointed extensions; ventral setae on P- 4 slender and short, not reaching the tip of P- 5. Male: medial margin of Cx-II/III relatively short; genital field oval, anteriorly enlarged and triangular, lateral margins slightly convex, slightly tapering to caudal end, genital flaps with long setae at lateral and posterior margins (Fig. 28 F); ejaculatory complex with small proximal chamber (Fig. 44 B). Female: genital field elongated trapezoid, anteriorly enlarged, laterally straight, tapering posteriorly. Measurements. Male (holotype, in parentheses paratype from Amedzofe Falls, n = 1)���Idiosoma (ventral view: Figs. 28 B, 38 A) L 734 (709), W 594 (583); dorsal shield (Figs. 28 A, 37 A) L 632 (600), W 519 (516), L/W ratio 1.22 (1.16); dorsal plate L 597 (560); shoulder platelets L 188���194 (181���188), W 63���67 (66���68), L/W ratio 2.9 ���3.0 (2.8); frontal platelets L 113���114 (116���117), W 61 (66���69), L/W ratio 1.84���1.86 (1.7���1.8), shoulder/ frontal platelets L ratio 1.64���1.72 (1.57���1.6). Gnathosomal bay L 147 (147), Cx-I total L 261 (277), Cx-I mL 114 (129), Cx-II+III mL 51 (41); ratio Cx-I L/Cx-II+III mL 5.1 (6.8); Cx-I mL/Cx-II+III mL 2.2 (3.1). Genital field L/ W 167 (166)/ 128 (129), ratio 1.31 (1.28); ejaculatory complex L (238); distance genital field-excretory pore 150 (141), genital field-caudal idiosoma margin 253 (223). Gnathosoma vL 157 (162); chelicera total L 208 (211); palp total L 225���228 (223���226), dL/H, dL/H ratio: P-1, 26/ 32, 0.81 (21���22 / 32, 0.67); P-2, 63��� 64 / 46, 1.37 (71 / 46, 1.54); P-3, 43/ 38���39, 1.12 (41���42 / 40, 1.04); P-4, 61��� 62 / 26, 2.35 (58���59 / 26, 2.23); P-5, 32/ 15, 2.1 (32 / 15, 2.1); P- 2 /P- 4 ratio 1 -03 (1.22); dL of I-L- 2���6: 72 (71), 90 (85), 106 (104), 103 (99), 105 (105); I-L- 6 H 38���39 (38���39), dL/H I- L- 6 ratio 2.74 (2.72). Female (paratype from Amedzofe Falls, n = 1)���Idiosoma (ventral view: Figs. 29 A, 38 B) L 758, W 631; dorsal shield (Fig. 37 B) L 619, W 531, L/W ratio 1.17; dorsal plate L 581; shoulder platelets L 183���188, W 66���67, L/W ratio 2.79; frontal platelets L 116���120, W 61, L/W ratio 1.9 ���2.0; shoulder/frontal platelets L ratio 1.5���1.6. Gnathosomal bay L 147, Cx-I total L 267, Cx-I mL 120, Cx-II+III mL 36; ratio Cx-I L/Cx-II+III mL 7.4; Cx-I mL/ Cx-II+III mL 3.3. Genital field L/W 178 / 162���163, ratio 1.1; distance genital field-excretory pore 156, genital fieldcaudal idiosoma margin 266. Gnathosoma vL 155; chelicera total L 217; palp total L 229, dL/H, dL/H ratio: P-1, 26/ 31, 0.84; P-2, 65/ 47, 1.38; P-3, 43/ 40, 1.08; P-4, 63/ 26���27, 2.38; P-5, 32/ 15, 2.14; P- 2 /P- 4 ratio 1.03; dL of I-L- 2���6: 65, 86, 106, 105, 105; I-L- 6 H 38���39, dL/H I-L- 6 ratio 2.72. Etymology. The species is named after Melpomene (Ancient Greek: ���������������), one of nine Muses from Greek mythology, who was a patron of tragedy. The species name is a noun in apposition (in the nominative case). Discussion. See discussion under Monatractides euterpe n. sp. Habitat. Sandy/bouldary streams, shaded by rainforest. Distribution. Ghana.
Published as part of Pe��i��, Vladimir & Smit, Harry, 2014, Torrenticolid water mites (Acari: Hydrachnidia: Torrenticolidae) from Ghana, pp. 1-80 in Zootaxa 3820 (1) on pages 44-46, DOI: 10.11646/zootaxa.3820.1.1, http://zenodo.org/record/286303
Databáze: OpenAIRE
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