微小鬼伞Coprinellus parcus

描述1 描述来源：Species clarification of fairy inkcap (“Coprinellus disseminatus”) in China
类型：完整全面的描述（摘录自专著、论文等）
描述原文：
Coprinellus parcus T. Bau, L.Y. Zhu & M. Huang sp. nov, Figures 8–10
Mycobank: MB 849761.
Etymology: “parcus” refers to the relatively small size of this species in sect. Disseminati.
Diagnosis: Basidiomata tiny-sized; pileus almost without brown hue, white to pearl white when young and become grey-white at age; basidia dimorphologic, most in short clavate; terminal cells of cau- lopellis at the lower part of stipes most in globose to ellipsoid, or utriform; usually seen in grassland and distributed in southern China.
Type: China: Guangdong Province: Zhaoqing City, Dinghu Mountain National Nature Reserve, on moss layer on stone in broad-leaved forest, 11 May 2017, Mei Huang, HMJAU46316 (ITS: OL355008; LSU: OL375245).
Description: Basidiomata tiny-sized. Pileus 0.3 − 0.9 cm, first subglobose or ovoid, semisphere to obtuse conical when mature, sometimes with a rounded umbo; white to pearl white (2A2) when young, become grey-white (6B1, 6B2) at age, sometimes white (1A2) to cream (1A3) at centre; the radial grooves extended to the top 1/3 of the cap after maturation, with a clear line at the folding part; pubescent. Context is very thin, only present at the centre part, white to cream. Lamellae narrow adnate, L = 18 − 22, I = 0 or 1, 0.1 cm in wide, first white (1A2) to cream (1A3), then brown-grey (6D4), finally blackish (6E2), not deliquescent at age. Stipe 1.8 − 3.9 × 0.05 − 0.1 cm, white (1A2) to cream (1A3), hollow, crispy, pubescent, without a volva-like margin, often attached to a cream (1A3) ozonium-state.
Basidiospores [60, 6, 6] (6.0)7.1 − 7.3(8.3) × (4.1)4.6 − 4.7(5.1) × (3.8)4.3 − 4.5(4.9) μm, Q 1 = 1.43 − 1.77, Q 2 = 1.54 − 1.75, ovoid in frontal view, amygdaliform with acute apex in side view, obconical at base and truncate at apex, dark red-brown (7E7) in water and blackish (7E4) in 5% KOH solution; germ pore central to slightly eccentric, 0.6 − 1.7 μm in wide. Basidia dimorphological, 10 − 20 × 6 − 8 μm, most in short clavate, 4-spored, sterigmata 2 − 4 μm in length; each basidium surrounded with 3 − 5 pseudoparaphyses. Cheilocystidia and pleurocystidia absent. Hymenophoral trama regular, trama hyphae 10 − 18 μm in wide. Pileipellis spherocystoderm at ridge part and groove part, consisting of subglobose cells, 15 − 54 × 12 − 43 μm, hyaline, thin-walled to slightly thick-walled; pileocystidia clavate to slender lageniform, 121 − 259 × 11 − 32 μm, with 9 − 14 μm wide, tapering neck, sometimes subcapitate apex, hya- line or with brown hue at base, thin-walled to slightly thick-walled. Caulopellis hyphae 2 − 6 μm wide, hyaline, sometimes branched and diverticulate, thin-walled to slightly thick-walled; hyphae of stipe trama 10 − 18 μm wide, hyaline, thin-walled to somewhat thick-walled. Caulocystidia lageniform to long lageniform, 28 − 170 × 17 − 18 μm, with 4 − 6 μm wide, erect or bender, tapering neck; terminal cells of caulopellis at lower part of stipes most in globose to ellipsoid, or utriform, 14 − 56 × 8 − 24 μm, sometimes with 4 − 6 μm wide stem, same colour with hyphae of caulopellis. Elements of the veil at pileus most in subglobose to globose, 16 − 53 × 5 − 7 μm, hyaline, thin-walled to slightly thick- walled; elements of the veil on stipe mostly consisted of single or chains of subglobose to globose elements, 12 − 41 × 9 − 35 μm when colourless, 6 − 12 × 5 − 7 μm and with a constricted middle part when yellow-brown (6C7) to dark brown (6D8), sometimes attached with a hyphae-like element, 2 − 7 μm in width, usually branched and diverticulate, thin-walled to slightly thick-walled. Clamp connection and pseudoclamps absent.
Habitat: In groups or caespitose in grassland or on the bark of a broad-leaved tree. Usually occurs in the middle spring to summer.
Distribution: South China.
Additional specimens examined: China: Guangdong Province: Zhaoqing City, Dinghu Mountain National Nature Reserve, on moss layer on stone in the broad- leaved forest, 11 May 2017, Mei Huang, HMJAU46315 (ITS: OR436404; LSU: OR436384); Guangzhou City, a campus of South China Agricultural University, in grass- land, 11 April 2023, Jia-Yin Lin and Kun-Long Yang, HMJAU67133 (ITS: OR436405); Guangzhou City, Tianhe District, Huolushan Forest Park, on soil near Ficus micro- carpa, 15 May 2023, An-Fei Zeng, HMJAU67137; Guangzhou City, Huangpu District, Niutou Moutain, on deciduous leaves of broad-leaved tree, 13 November 2023, Yu-Rong Liang, HMJAU67155; Shenzhen City, Longgang District, Furong Garden of Lotus Villa, in grass- land, 26 April 2023, Li Yin, HMJAU67132 (ITS: OR436406; LSU: OR436387). Guangxi: Chongzuo City, Longzhou county, Nonggang National Nature Reserve, on rotten wood of broad-leaved tree, 17 May 2017, Tolgor Bau, Mei Huang, and Guang-Fu Mou, HMJAU46320 (ITS: OR436402; LSU: OR436385); same location, on soil under broad-leaved forest, 16 May 2017, Tolgor Bau, Mei Huang, and Guang-Fu Mou, HMJAU46323 (ITS: OR436403; LSU: OR436386).
Notes: C. austrodisseminatus is similar to C. parcus in terms of colour and distribution, however, it could be distinguished by the latter by its larger pileus size, and its basidium is surrounded by 4 − 6 pseudoparaphyses, short-branched cylindrical terminal cells of caulopellis at the lower part of stipes, moreover, its caulocystidia and pileocystidia are relatively short which up to 140 μm. C. magnoliae is also found in southern China, it differs from C. austrodisseminatus in that its lamellae are relatively sparser, with a range of L = 16 − 19. Furthermore, C. magnoliae exhibits a trimorphological basidia.

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参考翻译：
Coprinellus parcus T. Bau, L.Y. Zhu & M. Huang
Mycobank编号：MB 849761
词源学：“parcus“指该物种在白小鬼伞组中相对较小的体型。
该物种的特点是担子果小型，菌盖几乎无褐色调，幼年白色至珍珠色，成年后变灰白色；担子二型（#指担子的长度聚集在两个不连续的区间中——网站作者注#），多数短棒状，中下部菌柄皮层末端细胞多数球形至椭圆形，或囊状；通常生活在草地中，分布于中国南方。
模式：中国广东省肇庆市。
担子果小型。菌盖0.3-0.9 cm，初为近球形或卵形，成熟时呈半球形至钝圆锥形，有时有钝圆凸；幼时呈白色到珍珠色，成年变灰白色，有时菌盖中心为白色至奶油色；辐射状沟槽延伸到菌盖顶部1/3处，折叠部分有明显的折线；有绒毛。菌肉非常薄，仅存在于菌盖中心，白色至奶油色。菌褶窄直生，L = 18-22, I = 0或1，0.1 cm宽，初为白色到奶油色，后变成棕灰色，最终变为黑色，老时不自溶。菌柄1.8-3.9 × 0.05-0.1 cm，白色至奶油色，中空，脆，有绒毛，无菌托状结构，常着生于奶油色的菌丝束。
担孢子正面观卵形，侧面观为尖顶杏仁形，基部倒锥形，顶端截形，在水中呈深红棕色，在5%KOH中呈黑色；芽孔位于中央或略偏，宽0.6-1.7μm。担子二型，10-20 × 6-8μm，大多为短棍棒形，4孢子，担子小梗长2-4μm；每个担子周围有3-5个周细胞。无褶缘囊状体和侧生囊状体。菌褶菌髓规则，菌髓菌丝宽10-18μm。菌盖皮层在凸起部和凹下部均spherocystoderm型，由近球形细胞组成，15-54 × 12-43μm，透明，薄到略厚壁；盖生囊状体棍棒状至细长长颈瓶形，121-259 × 11-32μm，颈部宽9-14μm，有时顶端略膨大，透明或基部带棕色调，薄到略厚壁。菌柄皮层菌丝宽2-6μm，透明，有时分枝和具分枝状突起，壁薄到略厚；菌柄菌髓菌丝宽10-18μm，透明，壁薄到略厚。柄生囊状体瓶形至长瓶形，28-170 × 17-18μm，颈部宽4-6μm，直或弯曲；菌柄下部皮层的顶端细胞大多为球形至椭圆形或瓶形，14-56 × 8-24μm，有时有4-6μm宽的柄，颜色与皮层菌丝相同。菌盖菌幕的成分大多为近球形至球形，16-53 × 5-7μm，透明，壁薄到略厚；菌柄上的菌幕成分大多由单个或成链的近球形至球形细胞组成，无色12-41 × 9-35μm或黄褐色至深褐色6-12 × 5-7μm且中部收缩，有时附有菌丝状细胞，宽2-7μm，通常分枝并具分枝状突起，薄到略厚壁。无锁状联合和假锁状联合。
生境：群生或簇生于草地或阔叶树腐木上。常出现于仲春至夏季。
分布：中国南方。
南方小鬼伞和微小鬼伞在颜色和分布地区上比较类似，但前者的菌盖更大，担子周围4-6个周细胞，菌柄中下部的皮层存在短分支圆柱状的末端细胞，拥有更短的盖生囊状体和柄生囊状体（最大140μm）。