Trismarcha parva Sanborn 2021, n. sp.
Creators: name: Sanborn, Allen F.
Publisher: name: Zenodo
Year: 2021
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hemiptera
Cicadidae
Trismarcha
Trismarcha parva

description: Trismarcha parva n. sp.
(Fig. 2)
Type material.— Holotype. “ MADAGASCAR: Tulear / Province, Berenty Special / Reserve, elev 85 m, / 8 km NW Amboasary / 24 March—3 April 2003 // 25° 00.40’S, 46° 18.20’E / California Acad of Sciences / colls: M. Irwin, F. Parker, / R. Harin’Hala, malaise trap / gallery forest MA-02-22-20 // CASENT 8082000” female (CASC) (CASTYPE number 20142).
Etymology.—The name is in reference to the small body size of this species when compared to congeneric species (L. parvus, little).
Description
Head and thorax castaneous marked with piceous, abdomen tawny marked with castaneous.
Head
Head wider than mesonotum, castaneous except short piceous longitudinal fascia lateral to lateral ocelli with posterior terminating in anterior cranial depression and small piceous spot at medial angle of eye. Dorsal head covered with sparse, short silvery, longer and denser posterior to eye. Ocelli red, eyes ochraceous but cells have retracted from eye surface so they appear hollow. Ventral head castaneous eye with piceous spot in posterior lorum, short silvery pile on lorum and gena, denser than on dorsal head. Postclypeus ground color with 11 piceous transverse ridges and longitudinal greenish ochraceous fascia in middle of central sulcus, short silvery pile in lateral transverse grooves.Anteclypeus castaneous, carina lighter with a pair of short, dark castaneous fasciae on either side of midline in the middle of the carina, covered with silvery pile. Mentum light castaneous, labium castaneous with piceous tip, rostrum radiating short silvery pile, reaching to posterior coxae. Scape and pedicel light castaneous, antennal flagellar segments dark castaneous.
Thorax
Pronotum castaneous with dark castaneous fasciae in lateral fissures extending anteriorly around anterior margin of lateral disk and posteriorly to ambient fissure, covered with short silvery pile. Pronotal collar dark ochraceous with greenish tint, lateral margin adpressed to pleurites. Mesonotum castaneous with piceous sigillae and scutal depressions, dark ochraceous parapsidal sutures, anterior arms of cruciform elevation, posterior half of lateral cruciform elevation, posterior arms and all but midline of dorsal cruciform elevation greenish ochraceous. Metanotum dark ochraceous with castaneous spot in middle wing groove. Mesanotum dorsum with short silvery pile on lateral and posterior margins, between anterior arms of cruciform elevation, between anterior and posterior arms of cruciform elevation, on posterior mesonotum, in wing groove, and on posterior metanotum. Ventral thoracic segments ochraceous except castaneous anepisternum 2, basisternum 2, and basisternum 3, covered with dense silvery pile.
Wings
Fore wings and hind wings hyaline with eight and five apical cells respectively. Venation ochraceous proximally, becoming castaneous distally, piceous fascia along base of radius & subcostal vein in proximal basal cell. Basal cell hyaline. Pterostigma present, reaching middle of ulnar dell 1. Basal membrane of fore wing gray with darker posterior margin. Hind wing venation similar to fore wing. Proximal anal cell 3, anal cell 3 and anal cell 2 along anal veins 3 to the curve, and anal cell 2 along anal vein 2 light gray.
Legs
Legs castaneous and dark ochraceous with posterior and middle legs lighter, coxae, trochanters and femora primarily castaneous, coxae margined laterally with piceous, middle and hind coxae with piceous fascia on anterior surface, femora striped with dark castaneous, distal ends dark ochraceous, tibiae dark ochraceous becoming lighter distally, tarsi dark ochraceous, tibial spurs and comb castaneous, pretarsal claws dark ochraceous with dark castaneous tips. Fore femora with primary spine longest, straight, angled to femoral axis, secondary spine upright with curved tip, tertiary spine angled more than primary spine, and small apical spine angled to greatest degree, spines decrease in length from primary to apical spine, spines castaneous with lighter base. Meracanthus broadly triangular with curved lateral margin, ochraceous with castaneous base, reaching to sternite III. Legs with short silvery pile and radiating long golden pile.
Operculum
Female operculum ochraceous, small castaneous spot on lateral base, lateral margin short, angled slightly mediad from broad base, posterolateral margin curved to straight posterior margin, posterior margin forming approximate right angle to lateral margin, medial margin short, not reaching middle of meracanthus, posterior margin reaching posterior of sternite II, covered with short silvery pile.
Abdomen
Abdominal tergites tawny with castaneous lateral regions, dark castaneous on lateral tergites 3–8, posterior margins of tergites 6–8 dark ochraceous, tergites covered with silvery pile. Female sternites I–II tawny marked with castaneous medially, auditory capsule castaneous, sternites III–VII castaneous with tawny lateral regions, sternite II anterior margin lighter, posterior sternites darker than anterior sternites. Epipleurites castaneous, epipleurite 3 with lighter anterior margin. Sternites and epipleurites with silvery pile, radiating long silvery pile. Female sternite VII tawny with triangular castaneous mark anterolaterally paralleling the notch, single, deep, narrow V-shaped notch, posterior margin on either side of notch smoothly curved to lateral margin. Female abdominal segment 9 tawny with dark castaneous anterolateral margin extending onto dorsolateral surface not reaching posterior margin, dorsal regions castaneous, dorsal beak castaneous angled dorsally, segment 9 covered with short silvery pile, radiating long silvery pile from lateral and dark ochraceous ventral regions. Dorsal beak not extending beyond castaneous anal styles, anal tube ochraceous. Posterior margin of abdominal segment 9 sinuate.
Genitalia
Female gonocoxite IX and gonapophysis VII tawny, gonapophysis IX dark castaneous with piceous tip, gonapophysis X dark castaneous. Ovipositor sheath long, extending well beyond dorsal beak and anal styles. Long silvery pile radiating from ovipositor sheath.
Male is unknown.
Measurements (mm).—N = 1 female. Length of body: 14.80; length of fore wing: 16.35; width of fore wing: 5.55; length of head: 2.65; width of head including eyes: 4.60; width of pronotum including suprahumeral plates: 4.80; width of mesonotum: 4.20.
Diagnosis.—The new species can be distinguished from the congeneric species by the body length less than 15 mm. The other species inhabiting Madagascar have female body lengths greater than 18 mm. It can be distinguished further from T. voeltzlowi Jacobi, 1917 females by the arched dorsal abdominal tergites, wingspan of about 35.3 mm versus more than 44 mm, the eyes are not as wide as the lateral angles of the pronotal collar in the new species but are wider than the lateral angles in T. voeltzlowi, the posterior opercular margin is straight in the new species but curved in T. voeltzlowi, and the notch in abdominal sternite VII is narrower than the new species.
Distribution.—The species is only known from the type specimen collected in Tulear Province, southwestern Madagascar.
description: Published as part of Sanborn, Allen F., 2021, The cicadas (Hemiptera: Cicadoidea: Cicadidae) of Madagascar including a new tribe, five new genera, twelve new species, four new species synonymies, five revised species status, ten new combinations, new tribal assignments for four genera, one new subtribe synonymy, a checklist and key to the species, pp. 1-79 in Zootaxa 4937 (1) on pages 27-29, DOI: 10.11646/zootaxa.4937.1.1, http://zenodo.org/record/4559438