Mortoniella papillata, Blahnik & Holzenthal, 2008

Blahnik, Roger J. & Holzenthal, Ralph W., 2008, Revision of the Mexican and Central American species of Mortoniella (Trichoptera: Glossosomatidae: Protoptilinae), Zootaxa 1711 (1), pp. 1-72 : 44-45

Mortoniella papillata , new species

Fig. 21

As previously discussed, Mortoniella papillata is similar to a group of species, including M carinula , M. opinionis , M. redunca , n. sp., M. sicula , n. sp, and M. umbonata , n. sp., all distinguished by the character combination of having an inferior appendage invaginated mesally and with protruding, often apically acute, apicolateral projections, and also a phallicata with well developed dorsolateral processes. Among these species, M. papillata is most diagnostically recognized by the papillate projections on the base of the paramere appendages. Other characters, in combination, that are useful in distinguishing this species from others in the group are the shape of the inferior appendage, which has the apicolateral projections broad basally and very narrowly acuminate apically, the prominent, basally thick endophallic spine, the shape of tergum X, which has a broad mesal projection and dorsoventrally flattened lateral projections, and the form of the dorsal phallic spine, which is sinuous in lateral view and narrowly acuminate apically. Papillate projections on the paramere appendage, although fewer in number and less pronounced, are sometimes present in M. florica (Flint) , but that species lacks the elongate apicolateral projections of the inferior appendage that characterizes the members of the group discussed above.

Adult. Length of forewing: male 2.8–3.3 mm, female 2.8–4.0 mm. Forewing with forks I, II, and III, hind wing with forks II and III. Overall color dark brown. Wing bar at anastamosis indistinctly marked with pale, light brown setae. Ventral process of abdominal segment VI (male) short, ventrally oriented, rounded to subtruncate apically, not or only slightly constricted basally.

Male genitalia. Segment IX nearly evenly rounded anterolaterally, length greatest midlaterally, posterolateral margin forming rounded projection in dorsal half, narrowing ventrally; segment deeply mesally excised dorsally and ventrally, dorsal excision narrow, much less than half width of segment. Tergum X with broad, apically obtuse mesal projection extending from lateral lobes, lateral lobes relatively short and broad, distinctly dorsoventrally flattened, apices sclerotized and blunt. Inferior appendage without apicomesal projection, apicolateral projections broad basally, tapering, acuminate apically; appendage with margins undeveloped basolaterally, lacking prominent projections on each side; mesal pockets of inferior appendage with apical processes short, dorsally curved. Paramere appendages very elongate, narrow, emerging from membranous lateral projections, strongly bowed near base; basal half of each appendage with numerous papillate projections, apical half very narrow, apex somewhat scabrous, acute. Dorsal phallic spine slightly enlarged basoventrally, weakly sinuous in lateral view, apex posteriorly directed, not strongly inflected; as viewed dorsally, with apex narrowly acuminate. Phallicata relatively straight, tubular, dorsolaterally with paired processes, elevated basally, projecting laterally apically; laterally with broadly rounded, explanate, projections. Endophallic membrane with single prominent, stout, curved spine.

Holotype male: COSTA RICA: Guanacaste: Parque Nacional Guanacaste , ca. 0.7 km N Est. Maritza, 10°57'36"N, 085°30'00"E, 550 m 31.viii.1990, Huisman & Quesada ( UMSP000001321 ) (pinned) ( UMSP).

Paratypes: COSTA RICA: Guanacaste: Parque Nacional Guanacaste, Río San Josecito , 10°55'19"N, 085°28'12"W, 960 m, 28–29.vii.1987, Holzenthal, Morse & Clausen — 2 males (pinned) ( UMSP) ; Río Tempisquito, Maritza , 10°57'29"N, 085°29'49"W, 550 m, 19–20.vii.1987, Holzenthal, Morse & Clausen — 1 male (pinned) ( UMSP) ; same locality, 30–31.viii.1990, Huisman, Blahnik & Quesada — 13 males, 8 females (pinned) ( UMSP) ; Estacion Maritza, Río Tempisquito , 10°57'29"N, 085°29'49"E, 550 m, 17–18.vi.1988, C. & O. Flint, Holzenthal — 1 male (pinned), 5 males, 8 females (alcohol) ( NMNH) ; Río Tempisquito Sur, Maritza , 10°57'00"N, 085°28'48"W, 600 m, 30–31.viii.1990, Huisman & Quesada — 19 males, 15 females (alcohol) ( UMSP) ; Río Orosí, Estación Pitilla , 10°59'28"N, 085°25'41"W, 700 m, 22–25.v.1990, Holzenthal & Blahnik — 1 male, 1 female (pinned) ( UMSP) ; unnamed trib., 0.7 km N Pitilla , 10°57'36"N, 085°30'00"W, 550 m, 31.viii.1990, Huisman & Muñoz — 12 males, 23 females (pinned) ( UMSP) .

Etymology. This species is named M. papillata , from the Latin word papilla, referring to a nipple, teat, or bud, for the short papillate projections from the base of the paramere appendages of this species.

Figures

FIGURE 21. Mortoniella papillata, new species. Male genitalia: A—lateral; B—segment IX and tergum X, dorsal; C— phallic ensemble, ventral; D—dorsal phallic spine, dorsal.