Lanmaoa is a genus of boletes characterized by a shallow hymenophore in comparison to other bolete genera. A quick field test for this genus is to determine the ratio of the hymenophore height (H.Y) to the pileus context height (PctY).

If H.Y is 1/5 to 1/3 (one-fifth to one-third) the size of PctY, there's a chance your bolete is Lanmaoa or a Baorangia. This test must be measured from the halfway point from the cap center to cap margin (Wu et al., 2016).

References

Wu, G., Zhao, K., Li, Y. C., Zeng, N. K., Feng, B., Halling, R. E., & Yang, Z. L. (2016). Four new genera of the fungal family Boletaceae. Fungal Diversity, 81, 1-24. https://doi.org/10.1007/s13225-015-0322-0