Agoo beani Bahder & Mou & Bartlett & Helmick & Bertaccini & Myrie 2020, sp. n

Autor: Bahder, Brian W., Mou, De-Fen, Bartlett, Charles R., Helmick, Ericka E., Bertaccini, Assunta, Myrie, Wayne
Rok vydání: 2020
Předmět:
DOI: 10.5281/zenodo.4498248
Popis: Agoo beani sp. n. Bahder & Bartlett (Figures 2���6) Type locality. Spring Garden, Portland Parish, Jamaica Diagnosis. A moderate sized, pale species; body and legs stramineous, forewings weakly fuscous on apical and trailing veins and cells, anterior cells and veins whitish except diffuse patch in costal cell; apical margin red. Genitalia approximately bilaterally symmetrical. Gonostyli spatulate in lateral view, dorsal process with two converging sclerotized projections and one membranous dorsally directed lobe; in ventral view gonostyli with large inner lobe at midlength with pointed, weakly sclerotized apex. Aedeagus approximately symmetrical with 3 pair of projections including 2 pair of elongate subapical retrorse spines and 1 pair of short subapical cultrate spines. Endosoma robust with 2 pair of robust elongate spines, ventral pair dorsally curved, reaching base of aedeagus; dorsal pair shorter, curved mediodorsad. Description. Color. General body color stramineous (Fig. 2) with subtle markings. Head with carinae and sensory pits of vertex and frons darker, lateral ocelli whitish. Pronotum with lateral margins of paranotal fovea darker. Mesonotum slightly embrowned laterally, medially paler; carinae pale. Forewing with trailing and apical veins and cells of weakly darkened; veins and cells of leading margin whitish except diffuse dark marking costal cell. Abdomenal tergites medially orangish. Structure. Body length males: 5.76���5.78 mm (n =7) with wings; 3.59���3.61 mm without wings, body length females (n =7): 5.77���5.79 mm with wings; 3.60���3.62 mm. Head. In lateral view, anterior margin of head smoothly rounded from posterior margin of vertex to frontoclypeal suture (Figs. 3C). Rostrum exceeding hind coxae (Fig. 2B). In frontal view (Fig. 3A), lateral carinae of head foliately keeled, keel bearing a row of sensory pits for entire length of vertex and frons. Frons narrow (median carina absent), narrowest near middle of compound eyes, becoming gradually wider both dorsally and ventrally (to frontoclypeal suture). Vertex triangular, broadest near base, deeply and truncately concave at posterior margin (Fig. 3B), anteriorly notched. Vertex length males: 0.25���0.26 mm; females: 0.26��� 0.26 mm. Vertex width at hind margin males: 0.16���0.17 mm; females: 0.17 mm. Vertex width at distal margin males: 0.05���0.06 mm; females: 0.06 mm. Frons length males: 0.55���0.56 mm; females 0.56��� 0.56 mm. Frons dorsal width males: 0.13���0.14 mm; females; 0.15 mm. Frons frontoclypeal margin width males: 0.21���0.22 mm; females: 0.23 mm. Clypeus length males: 0.75���0.76 mm; females: 0.77 mm. Thorax. Pronotum relatively wide at midline (about half length of frons), anterior margin convexly arched behind vertex, following posterior margin of head around eyes (Fig. 3B), median carina obsolete, lateral carinae tracing head outline; paranota strongly foliate (exceeding antennal pedicle), projecting above and beneath antennae, paranotal foveae semiquadrate in frontal view (Fig. 3A). Pronotum length at midline, males: 0.24���0.25 mm; females: 0.25 mm. Mesonotum approximately as wide as long at midlength, tricarinate, lateral carinae subparallel (Fig. 3B). Mesonotum length at midline males: 0.80���0.81 mm; females: 0.81 mm. Mesonotum width males: 0.94���0.95 mm; females: 0.95���0.96 mm. Spinulation of hindleg; 7-6-5. Tegminal branching pattern RA 1 branched, RP 2 branched, MP 4 branched (M basally fused with Sc+R forming long stem from basal cell), CuA 2 branched (appearing 3 branched with icu); fork of Sc+RA and RP slightly distad of CuA fork, the latter just anterior to fusion of Pcu and A 1 in clavus (A1 closely tracing trailing margin for most of length); claval apex at about tegmen midlength. Forewing length males: 5.26���5.27 mm; females: 5.27��� 5.27 mm. Terminalia. Pygofer in lateral view narrow, posterior and anterior margin sinuate (Fig. 5A), widest ventrally (very narrow dorsally); medioventral process in ventral view subtriangular, wider than long (Fig. 5B). Gonostyli in lateral view spatulate, ventral margin strongly sinuate, dorsal margin linear, small lobe near midlength, unsclerotized, two converging sclerotized processes, similar in size, distad of lobe (Fig. 5A). Aedeagus approximately bilaterally symmetrical bearing three pairs of processes (Fig. 6), one pair (Figs. 6A, B; A 1, A 2), subapical, short and cultrate, apex sharp, directed caudad; 2 pair of elongate retrose process arising approximately apically, median pair (Fig. 6C, A 3, A 4), angled anteriorly, curved ventrad, extending to midlength of aedeagus (Fig. 6A, B); lateral pair (Fig. 6C, A 5, A 6) nearly straight with apex slightly curved dorsad (Fig. 6A, B). Endosoma complex bearing four large, robust sclerotized processes from apex (Fig. 6, E 1-E 4), curved dorsad; larger pair (E1, E2) reaching aedeagal base, appearing distad to shorter pair (E3, E4) in dorsal view. Anal tube stout and short (exceeded by gonostyli) in lateral view (Fig. 5A), anterior and posterior margins parallel, ventral margin straight, forming parallelogram. Plant associations. Coconut (Cocos nucifera L.), Arecaceae. Distribution. Jamaica (Portland Parish, St. Elizabeth Parish). Etymology. The specific name is in honor of Mr. Basil Bean, former director of the Coconut Industry Board in Kingston, Jamaica. Material examined. Holotype male ��� Jamaica, Portland Parish / Spring Garden, CIB Plot / 01.X.2019 / Coll.: B.W.Bahder / Host: Cocos nucifera // Holotype / Agoo beani ��� (FLREC). Paratypes, same as holotype (17 males, 6 females, FLREC and FSCA). Sequence data. A total of 641 bp for the COI locus were sequenced for Agoo beani sp. n. (GenBank Accession No. MT 413388). On average, A. beani sp. n. differed by 15.9% from other members of Agoo (Table 1) while differing 20.5% in average to other genera within the Cenchreini for the COI locus based on the pairwise comparison (Table 1). The maximum likelihood analysis demonstrated strong bootstrap support (93) for the genus Agoo relative to other taxa within the Cenchreini (Fig. 7) with A. beani sp. n. resolving within the Agoo clade. A 1,380 bp product was sequenced for the 18S locus for A. beani sp. n. (GenBank Accession No. MT 415403). Based on the pairwise comparison, on average, A. beani sp. n. differed by 1.0% on average from other members of Agoo (Table 2), while other members of Agoo differed by about 1% from each other (Table 2). On average, A. beani sp. n. differed by 14.1% from the other genera within the Cenchreini that were analyzed (Table 2). The maximum likelihood analysis based on 18S demonstrated even higher bootstrap support for the genus Agoo (100) and A. beani sp. n. resolved in the Agoo clade (Fig. 7). The consensus tree generated between COI and 18S also provides strong bootstrap support for Agoo as a clade but also the placement of A. beani sp. n. within the genus. Remarks. The overall structure of the terminalia and aedeagus and strong molecular evidence supports Agoo beani sp. n. as distinct from all currently described species of Agoo. Initially, the wing coloration in the field appeared similar to that of A. xavieri; however, the fuscous stripe in A. beani sp. n. is not as pronounced as in A. xavieri and the general color of A. xavieri is a more brilliant yellow. The two species also differ in features of the terminalia, but perhaps may be most easily diagnosed by A. beani sp. n. with the ventral lobe of the pygofer wider than long (longer than wide in A. xavieri) and the parallelogram-shaped ventral margin of the anal tube (sinuate with apex elongated in A. xavieri). Other features observed in the genus, such as an elongate and narrow frons, subquadrate projections of paranota in frontal view, and nearly symmetrical aedeagus with complex endosoma are present in A. beani sp. n. and because of these features along with strong molecular evidence for both the COI and 18S loci, the placement of the novel taxon in Agoo is strongly supported.
Published as part of Bahder, Brian W., Mou, De-Fen, Bartlett, Charles R., Helmick, Ericka E., Bertaccini, Assunta & Myrie, Wayne, 2020, A new species of planthopper in the genus Agoo Bahder & Bartlett (Hemiptera Fulgoroidea: Derbidae) from coconut palm (Cocos nucifera L.) in Jamaica, pp. 254-264 in Zootaxa 4853 (2) on pages 258-262, DOI: 10.11646/zootaxa.4853.2.6, http://zenodo.org/record/4498224
Databáze: OpenAIRE
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