Phlebopus (Boletales) is a genus of Fungi with species characterized by robust basidiomata with glabrous to tomentose or velvety pileus, a central thick and non-reticulated, non-hollow stipe, and an adnate-depressed hymenophore. Their context is variable in color and unchanging or slowly develops a blue reaction when exposed to air. They also have short subglobose to ellipsoid basidiospores that are smooth and possess clamped hyphae. A recent collection in Brazil turned up the rare Neotropical species P. brasiliensis, which is only known from type materials from the original description, and which is only one of six species present in the country. Here, we validate the identity of this species and insure its separation from similar congeners including P. mexicanus. Phlebopus brasiliensis is characterized by the dry velutinous pileus surface that then becomes finely areolate in older basidiomata and with an olivaceous color; hymenophore with small pores to 0.5 mm wide with a context that is cream-colored then greenish-blue on exposure to air, and the absence of hymenial cystidia. Alternatively, Phlebopus mexicanus has slightly smaller basidiospores (average 6.4 × 5 μm), larger pores (1–2 per mm, each 0.5–1 mm diameter) and granulose-pruinate stipe to base. These differences help confirm the identity of P. brasiliensis and also establish its presence in a new location in Brazil i.e., a conservation zone that differs in disturbance from its type locality.

Phlebopus（Boletales）是真菌的一个属，其特征是坚固的basidiomata，具无毛到绒毛状或绒毛状的绒毛，中央浓密且无网状，不空心的柄，并有贴壁状的退化的处女膜。当暴露在空气中时，它们的背景颜色可变，不变或缓慢地产生蓝色反应。它们还具有短的亚球状到椭圆形的basidiospores，它们光滑且具有固定的菌丝。巴西最近的一次采集发现了罕见的新热带物种巴西乳杆菌（P. brasiliensis），该物种仅从原始描述的类型材料中才知道，并且仅是该国六种物种之一。在这里，我们验证了该物种的身份，并确保将其与包括墨西哥疟原虫在内的同类同源物分离。巴西le鱼的特征是干燥的绒毛状绒毛表面，然后在较老的basidiomata中变成细的油状，颜色为橄榄色。带有小孔的膜状菌毛，宽至0.5毫米，周围为乳白色，暴露于空气后呈蓝绿色，不存在膜状囊虫。另外，墨西哥竹假单胞菌的孢子孢子稍小（平均6.4×5μm），毛孔较大（每毫米1-2个，每个直径0.5-1毫米），基部有颗粒状的果核柄。这些差异有助于确认巴西假单胞菌的身份，并在巴西的一个新地点（即，其类型所在地区的干扰有所不同的保护区）确定其存在。