Yamuy marginatus, Arriaga-Varela & Tomaszewska & Szawaryn & Robertson & Seidel & Ślipiński & Fikáček, 2023

Arriaga-Varela, Emmanuel, Tomaszewska, Wioletta, Szawaryn, Karol, Robertson, James, Seidel, Matthias, Ślipiński, Adam & Fikáček, Martin, 2023, The resurrection of Cerasommatidiidae, an enigmatic group of coccinelloid beetles (Coleoptera: Coccinelloidea) based on molecular and morphological evidence, Zoological Journal of the Linnean Society 197 (4), pp. 1078-1115 : 1107-1108

publication ID	https://doi.org/ 10.1093/zoolinnean/zlac082
publication LSID	lsid:zoobank.org:pub:99842C3A-879F-4552-96B7-204D79CF3EDF
DOI	https://doi.org/10.5281/zenodo.7814197
persistent identifier	https://treatment.plazi.org/id/03C2CE00-FFE4-FF85-3EF8-0FAAFDFE4524
treatment provided by	Plazi
scientific name	Yamuy marginatus
status

Treatment

YAMUY MARGINATUS ARRIAGA- VARELA,

TOMASZEWSKA & SZAWARYN SP. NOV.

( FIGS 12C, D View Figure 12 , 13A View Figure 13 , 14D–F View Figure 14 , 16A–F View Figure 16 , 20A View Figure 20 )

Zoobank registration: urn: lsid: zoobank. org:act: 2D30BBFE-4F4D-4C1D-9C97-C0BBB4F6B2F6

Type material: Holotype, male, PUERTO RICO: Orocovis Bosque Estatal Toro Negro, sector Doña Juana , 5.6 km N of Villalba 18°10.6′N, 66°29.7′W; 810 m, 29.vi.2016; Deler, Fikáček & Seidel lgt., PR18// sifting of small accumulations of leaf litter and rotten palm leaves and fruit in sparse montane forest at the stream bank ( NMPC) GoogleMaps . Paratypes: PUERTO RICO: San German, Bosque Estatal Maricao, 8.6 km N of Sabana Grande 18°8.0′N, 66°59.5′W; 820 m, 28.vi.2016; Fikáček & Seidel lgt., PR16 (one, MIZ) GoogleMaps ; Puerto Rico: Jayuya, Toro Negro at 18°10.335′N, 66°35.504′W; 1350 m, WP-479, Arboreal moss sifting; 3 Sept. 2014, A.S. Konstantinov (one female, MTEC) GoogleMaps .

Diagnosis: Yamuymarginatus canbeeasilydistinguished from Y. constratus by having the elytra pale yellow decorated with dark-infuscate transverse markings ( Fig. 12C, D View Figure 12 ) (uniformly coloured in Y. constratus ), the lateral margins of the pronotum provided with long/ complete subparallel internal carinae demarcating a wide area ( Fig. 16B View Figure 16 ) (internal lateral carinae present only basally in Y. constratus ), the anterior margin of the metaventrite and abdominal ventrite 1 with a pair of short postcoxal longitudinal carinae ( Fig. 16D, F View Figure 16 ) (in Y. constratus anterior margin of metaventrite and abdominal ventrite 1 bordered with crenulate bordering line, without carinae), and by punctation on dorsal surface: apart from long setae present in both species, tiny short hairs are growing from simple comparatively large punctae/depressions in Y. marginatus ( Fig. 16B View Figure 16 ) and in Y. constratus they are growing from conspicuous tubercles set in round punctae.

Description: Body: length 0.90–0.94 mm, 1.6 times as long as wide, 2.2 times as long as high, short oval and moderately convex ( Fig. 12C, D View Figure 12 ). Coloration pale-yellow with whitish legs; elytra with dark-infuscate transverse markings on basal eighth and a large, transverse, irregularly oval one on each elytron at apical threequarters; antenna with apical three antennomeres dark infuscate ( Fig. 12C, D View Figure 12 ).

Antenna nearly 0.4 of the length of the body; antennomeres 1–6 as long as wide ( Fig. 13A View Figure 13 ); antennomeres 7–9 subquadrate. Apical labial palpomere short and rounded, 1.3 times as long as wide.

Pronotum 1.8 times as wide as long, 1.6 times wider at widest part than at front angles ( Fig. 16B View Figure 16 ). Anterior pronotal bordering narrow and regular. Area between lateral edge and internal lateral carina weakly concave, wider at two-thirds and continuously weakly narrowing posteriorly and anteriorly; pronotal disc not concave along internal lateral carina. Base of pronotum not bordered. Posterolateral indentations comparatively deep, briefly acute. Prosternal process with apex about 0.3 of width of procoxal cavity, narrowest near half-length, distinctly widened apically, lateral carinae reaching anteriorly beyond half-length of prosternum, central area distinctly depressed ( Fig. 16C View Figure 16 ).

Elytra 0.6 mm long, about as long a wide, 2.5 times as long and 1.3 times as wide as pronotum. Elytral lateral margins visible from above ( Fig. 12C View Figure 12 ). Mesoventral process about as wide as mesocoxal diameter ( Fig. 16D View Figure 16 ). Metaventrite with few fine setiferous punctures on sides; with small longitudinal carina near the posterior-most part of each mesocoxal cavity almost reaching mid-length of metaventrite ( Fig. 16D View Figure 16 ).

Legs. Meso- and metatrochanters weakly flattened, not produced posteriorly ( Fig. 16D View Figure 16 ).

Abdomen. Ventrite 1 with anterior margin with a small longitudinal carina near the internal-most margin of each metacoxal cavity reaching mid-length of ventrite ( Fig. 16F View Figure 16 ). Male genital segment as in Fig. 14D View Figure 14 .

Male genitalia ( Fig. 14E View Figure 14 ). Aedeagus with penis short and stout, sclerotized, curved, weakly narrowing towards apex. Tegmen sclerotized, short ring, with long ramus extending anteriorly beyond apex of penis; tegminal strut short, reduced.

Female genitalia ( Fig. 14F View Figure 14 ). Ovipositor weakly sclerotized. Spermatheca comparatively large, elongate, irregular – ‘infundibuliform’, submembranous; sperm duct of medium length, about half the length of spermatheca; accessory gland small membranous, of irregular shape. Proctiger large, narrow, weakly sclerotized.

Etymology: From the Latin, marginatus , edged, based on the characteristically bordered lateral pronotal margins that distinguish it from the other species in the genus.

Biology: One of the specimens was collected by sifting small accumulations of leaf litter and rotten palm leaves and fruits in sparse montane forest at elevation of 821 m. The second one, by sifting arboreal mosses in montane area at elevation of 1350 m.

Distribution: Puerto Rico ( Fig. 20A View Figure 20 ).