Mortoniella carinula, 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 : 22-24

Mortoniella carinula , new species

Fig. 8

Mortoniella carinula is similar to a group of species, including M. opinionis , n. sp., M. papillata , n. sp., 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. carinula is differentiated by the form of the dorsal phallic spine, which is more or less linearly extended apically, rather than being distinctly upturned, and keeled apicomesally, making it appear slightly widened at the apex in lateral view. Some minor variation was encountered in the form of the apicolateral projections of the inferior appendage, as well as in the form of tergum X, as shown in Fig. 8 .

Adult. Length of forewing: male 3.5–4.1 mm, female 3.8–4.7 mm. Forewing with forks I, II, and III, hind wing with forks II and III. Overall color medium brown, palps darker brown, apices of tibiae, tarsal and basal antennal segments light brown. Wing bar at anastamosis indistinctly marked with pale, light brown setae. Ventral process of abdominal segment VI (male) short, ventrally oriented, subtriangular, subacute apically, not 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 short, acute apicomesal projection and projecting lateral lobes, lateral lobes with apices narrowed, subacute, mesally curved. Inferior appendage without apicomesal projection, apicolateral projections very narrow, elongate, apices acuminate, usually slightly ventrally recurved ( Fig. 8A ), sometimes nearly straight or slightly dorsally curved ( Fig. 8E ), extreme apex scabrous; basolaterally, with short, rounded projections on each side; mesal pockets of inferior appendage with apical processes short, dorsally curved. Paramere appendages elongate, narrow, apex widened and scabrous. Dorsal phallic spine slightly enlarged ventrally, dorsal contour sinuous, apex only slightly upturned, appearing somewhat widened due to dorsomesal carina; as viewed dorsally, with apex acute. Phallicata relatively short, dorsally with paired, upright, subquadrate processes, laterally with broadly rounded, sclerotized explanate projection on either side. Endophallic membrane with single prominent, stout, curved spine.

Holotype male: COSTA RICA: Cartago: Reserva Tapantí, Quebrada Segunda @ administration building, 09°45'40"N, 083°47'13"W, 1250 m, 9–10.v.1990, Holzenthal & Blahnik ( UMSP000001358 ) (pinned) ( UMSP).

Paratypes: COSTA RICA: Cartago: Reserva [Parque Nacional] Tapantí, Río Grande de Orosí , 09°41'10"N, 083°45'22"W, 1650 m, 18–21.iii.1987, Holzenthal, Hamilton & Heyn — 1 male (pinned) ( UMSP) ; Quebrada Palmitos & falls, ca. 9 km (road) NW tunnel, 09°43'12"N, 083°46'48"W, 1400 m, 2– 3.vi.1990, Holzenthal, Blahnik & Muñoz — 2 females (pinned) ( UMSP) ; same locality, 1–2.viii.1990, Holzenthal, Blahnik & Muñoz — 1 male, 3 females (pinned) ( NMNH) ; same locality, 24–25.iii.1991, Holzenthal, Muñoz & Huisman — 2 males (pinned), 1 male (alcohol) ( UMSP) ; same locality, 21.ii.1992, Holzenthal, Muñoz & Kjer — 1 male (pinned) ( UMSP) ; Río Dos Amigos & falls, ca. 6 km (road) NW tunnel, 09°42'14"N, 083°46'59"W, 1500 m, 4–5.viii.1990, Holzenthal, Blahnik & Muñoz — 1 male (pinned) ( UMSP) ; waterfall, ca. 1 km (road) NW tunnel, 09°41'24"N, 083°45'36"W, 1600 m, 2–3.viii.1990, Holzenthal, Blahnik & Muñoz — 3 males, 1 female (pinned) ( NMNH) ; same locality and date as holotype — 2 females (pinned), 1 male (alcohol) ( UMSP) ; same locality, 23.viii.1990, Holzenthal & Huisman — 1 female (pinned) ( UMSP) ; Puntarenas: Río Bellavista , ca. 1.5 km NW Las Alturas, 08°57'04"N, 082°50'46"W, 1400 m, 2–3.viii.1987, Holzenthal Morse & Clausen — 1 male, 6 females (pinned) ( UMSP) ; San José: Quebrada

Caraiges, 2.5 km (road) SW La Legua, 09°44'02"N, 084°07'12"W, 1400 m, 22.i.1992, Holzenthal, Kjer & Quesada — 3 males, 4 females (pinned) ( UMSP); El Salvaje, Río Tabarcia , 8 km (road) E Palmichal, 09°50'49"N, 084°07'12"W, 1650 m, 19–20.i.1992, Holzenthal, Kjer & Quesada — 6 males, 6 females (pinned) ( INBIO) .

Etymology. This species is named M. carinula , diminutive of the Latin word carina, meaning keel, and referring to the projecting keeled apex of the dorsal phallic spine that is a distinctive characteristic of this species.

Figures

FIGURE 8. Mortoniella carinula, new species. Male genitalia: A—lateral; B—segment IX and tergum X, dorsal; C— phallic ensemble, ventral; D—dorsal phallic spine, dorsal; E—inferior appendage variation, lateral; F—tergum X variation, dorsal