Laboulbenia rugosa W.Rossi & M.Leonardi, 2020

Rossi, Walter & Leonardi, Marco, 2020, New Laboulbeniales from China (Ascomycota), Cryptogamie, Mycologie 20 (1), pp. 1-7 : 2-3

Laboulbenia rugosa W.Rossi & M.Leonardi , sp. nov.

( Fig. 1 B-D)

Thallus slender and elongate, with unbranched and elongate outer appendage; receptacle with wrinkled surface, bearing dark spots on cells III, IV and V; perithecial tip not strongly tapered.

ETYMOLOGY. — From Latin rugosus which means wrinkled, because of the wrinkled surface of the receptacle.

MATERIAL EXAMINED. — China. NW Sichuan, Maeirma, 40 km SE of Aba, alt. 3250 m, on the elytra of Amerizus (Tiruka) shatanicus Deuve ( Coleoptera , Carabidae , Bembidiini), 9-29.VI.2004, leg. R. Fabbri, (holo-, FI [FI WR3374 ]; para-, FI [FI WR3380 ]); N Yunnan, Diquing Tibet Aut. Prov., Zhongdian Co., Xue Shan 25 km S Zongdian , alt. 3675-3725, 27°28.3’N, 99°41.5’E, on the elytra of a paratype of A. (T.) davidales Sciaky & Toledano, 2.VI.2005, leg. A. Smetana (para-, FI [FI WR3506 ]); Sichuan, Ganzi pref., Daxue Shan , 5 km E Kangding , river valley, c. 3000 m, on the elytra of A. (T.) perraulti Deuve , 20-23.V.1997, leg. A. Pütz (para-, FI [FI WR3507 ]).

MYCOBANK. — MB 831066.

DESCRIPTION

Thallus elongate, colored yellowish gray except for the perithecium, which is much darker and colored grayish brown; the surface of the receptacle is wrinkled, sometimes distinctly so especially in the upper portion. Cell I about three times longer than maximum width, slightly tapering and frequently curving towards the base. Cell II very elongate, twice or more longer than cell I, with almost parallel margins. Cell III slightly longer than broad and gradually enlarging from below upwards. Cell IV quadrangular, slightly shorter than cell III, with the cuneate cell V in the upper, inner angle, the surface of both these cells and, to a lesser extent of cell III, covered with irregular dark spots. Insertion cell blackish and thick. Outer appendage simple, slender and elongate, always broken in mature thalli. Inner appendage short, consisting of two superposed cells bearing two antheridia, one of which at the top, the other somewhat lower. Perithecium free from 2/3 to ª⁄5 of its length, relatively small, about twice longer than maximum width, asymmetrical, with the slightly convex ventral side tapering regularly to the tip, while the dorsal side is more convex and is distinguished from the tip by a constriction; the tip relatively short and broad, blackened on the dorsal side and much paler on the ventral, ending in large hyaline lips forming an almost flattened apex. Length from foot to perithecial tip (360)425-650 µm; perithecium 110-145 × 55-70 µm; longest appendage 270 µm.

REMARKS

Because of the simple outer appendage and cell V not in contact with cell III, Laboulbenia rugosa , sp. nov., is likely related to L. vulgaris Peyr. , which is common on other genera of the Bembidiini.

Figures

FIG. 1. — A, Laboulbenia assingii, sp. nov.; B, Laboulbenia rugosa, sp. nov.,immature thallus showing nuclei;C, Laboulbenia rugosa, sp. nov., mature thallus from the type slide; D, Cells III, IV and V of Laboulbenia rugosa, sp. nov., showing wrinkled surface. Scale bars: 50 µm.