Dasyplocia Gonçalves & Pescador & Peters 2020, gen. nov.
Creators: name: Gonçalves, Inês C.
name: Pescador, Manuel L.
name: Peters, Janice G.
Publisher: name: Zenodo
Year: 2020
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Ephemeroptera
Euthyplociidae
Dasyplocia

description: Dasyplocia gen. nov. Gonçalves, Pescador & Peters
Diagnosis: Male subimago – 1) Hind wing approximately 4x shorter than forewing (Fig 17); 2) MP2 of forewing not recurved basally (Fig 17); 3) Median caudal filament well developed.
Nymph – 1) Head almost as long as wide, length including clypeus more than 0.8x its width (Figs 1–3); 2) Clypeus long, quadrate, with apicolateral projections (Figs 1–3); 3) Mandibular tusks comparatively short, stout, densely covered with long hair-like setae and lacking spine-like setae (Figs 1–3); 4) Tusk length about 6.5x width (Figs 1–3); 5) Apex of tusks not truncated (Figs 1–3); 6) Third segment of maxillary palp about 5.5x longer than wide (Fig 13); 7) Apex of 3 rd segment of maxillary palp with acute, long and narrow projection (Fig 14); 8) Apex of 3 rd segment of labial palp with rounded projection (Fig 12); 9) Anterior margin of flanges on pronotum semi-rounded (Figs 1–3, 15); 10) Tarsus I with apical projection, projection about as long as tarsal claw (Fig 4); 11) Tibia I with long projection, reaching half the length of tarsus (Fig 4); 12) Tibial projection without setae on its margins; 13) Gill I with single lamella (Fig 16).
Nymph: Head: Almost as long as wide, length more than 0.8x its width including clypeus; clypeus quadrate with medial region of anterior margin convex and anterolateral corners acute; antennae long, at least 3x longer than length of head (Figs 1–3).
Mouthparts: Labrum: lateral margins subparallel; anterior margin with medial shallow emargination; lateral margins and dorsal surface with few scattered setae and median basal cluster of setae; anterior margin with dense row of setae (Fig 8). Mandibular tusks a little longer than head (less than 1.25x length of head); tusks short, stout, sickle-shaped, lacking spine-like setae; densely covered with hair-like setae except for ventral surface; length about 6.5x width (Figs 1–3). Right mandible: 4 apical denticles on outer incisor and 2 on inner incisor, prostheca absent (Fig 11); left mandible: 4 apical denticles on outer incisor and 3 on inner incisor, prostheca sclerotized, straight and cylindrical (Fig 10). Maxillae: 3 apical canines and one strong subapical setae; inner margin distally with 2 rows of strong setae; inner margin densely covered with long setae basally; outer margin of maxillae with long setae; apical margin with inner half covered with dense rows of shorter setae; basal segment of palpi with setae on lateral margins; 2 nd and 3 rd segments densely covered with setae on all surfaces; apex of 3 rd segment constricted, acute and narrow; 3 rd segment about 5.5x times longer than wide and 2x longer than 2 nd segment (Figs 13–14). Labium: glossae and paraglossae densely covered with setae ventrally; glossae tear-drop shaped; paraglossae dorsal to glossae; outer margin of palpi with long setae, setae shorter on 1 st segment and denser on 3 rd segment; 3 rd segment with patch of short spine-like setae dorsally and 5 strong setae adjacent to patch; 3 rd segment more than 2x length and width of 2 nd segment, balloon-shaped with apex acute (Fig 12). Hypopharynx: lingua subquadrate with shallow median emargination distally and with scattered long setae; distal margin densely covered with short setae; superlinguae with distal margin, inner margin and distal half of outer margin covered with long setae (Fig 9).
Thorax: Collar on pronotum present. Pronotum with short anterolateral spines; marginal flanges progressively wider anteriorly, with wide and somewhat rounded apex (Figs 1–3 and 15). Hind wing pads very small in comparison with forewing pads. Prosternum with a pair of oblique ridges, forming a narrow triangle with posterior margin.
Legs: Tarsal claws without denticles; legs covered with setae, setae sparse on middle and hind legs. Forelegs with coxae close to each other; anterior margin of femora covered with long setae on dorsal and lateral surfaces; tibiae and tarsi densely covered with long setae, apical projection of tibiae long (reaching half the length of tarsi), inner margin of projection glabrous; tarsi also with a long apical projection (about as long as tarsal claw) and covered with setae (Fig 4). All legs without tibial suture; projection on tibiae bordered with strong setae; inner margin of tibiae and tarsi with row of strong setae. Hind legs with cluster of short setae on distal ventral surface; inner margin of tibiae with rows of short setae.
Abdomen: Gills on segments I-VII; gill I vestigial with broad single lamella (Fig 16). Caudal filaments long, with setae along entire length.
Male subimago: The nymph with black wing pads provides a good view of the genitalia, terminal filaments and to a certain extent of the wings; wings were dissected from wingpads.
Wings: Forewing about 13.1 mm and hind wing about 3.3 mm. Dissected wings in poor condition; fork of vein MA of forewing distal to fork of vein Rs, MP2 straight, other veins and intercalaries not visible (Fig 17). Hind wing torn; venation not clear.
Terminal Filaments: median caudal filament well developed (broken on its length) (Fig 5).
Genitalia: Forceps with two segments, distal segment shorter than basal segment. Penes tubular, constricted apically (Fig 5). Penes morphology is likely to change on adult male as is often the case in other Euthyplociidae such as in Campylocia.
Male imago, female imago and subimago: Unknown.
Etymology: “Dasys” – Greek word meaning “thick with hair” in reference to the dense concentration of long hair-like setae found on the mandibular tusks; plocia – as in genera of Euthyplociidae; feminine.
description: Published as part of Gonçalves, Inês C., Pescador, Manuel L. & Peters, Janice G., 2020, A new genus of Euthyplociinae from Ecuador (Ephemeroptera: Euthyplociidae), pp. 107-112 in Zootaxa 4759 (1) on pages 108-109, DOI: 10.11646/zootaxa.4759.1.7, http://zenodo.org/record/3756072