taxonID	type	description	language	source
79183AF77CB85EE0AADEA2475353FAE9.taxon	description	Fig. 2	en	Ding, Zi-Ying, Ji, Xin-Yu, Tao, Meng-Fei, Jiang, Yang, Liu, Wen-Xiu, Wang, Yi-Xin, Meng, Zhe, Liu, Xiao-Yong (2025): Unveiling species diversity within early-diverging fungi from China IV: Four new species of Absidia (Cunninghamellaceae, Mucoromycota). MycoKeys 119: 29-46, DOI: 10.3897/mycokeys.119.147816
79183AF77CB85EE0AADEA2475353FAE9.taxon	etymology	Etymology. The epithet arrhiza (Lat.) refers to producing few rhizoids in this species.	en	Ding, Zi-Ying, Ji, Xin-Yu, Tao, Meng-Fei, Jiang, Yang, Liu, Wen-Xiu, Wang, Yi-Xin, Meng, Zhe, Liu, Xiao-Yong (2025): Unveiling species diversity within early-diverging fungi from China IV: Four new species of Absidia (Cunninghamellaceae, Mucoromycota). MycoKeys 119: 29-46, DOI: 10.3897/mycokeys.119.147816
79183AF77CB85EE0AADEA2475353FAE9.taxon	description	Description. Hyphae branched, hyaline at first, gradually becoming brown when mature, aseptate when young, septate with age. Stolons branched, smooth, hyaline, brownish, septate, 3.7 – 9.7 µm in diameter. Rhizoids root-like, hyaline, poorly developed, simply branched. Sporangiophores arising from stolons, erect or slightly bent, single or 2 – 3 in whorls, unbranched, hyaline, 10.6 – 150.5 µm long, 2.4 – 5.3 µm wide, with a septum 14.4 – 18.7 µm below apophyses. Sporangia globose, multi-spored, smooth, deliquescent-walled, colorless when young, brownish when old, 10.5 – 38.8 µm long, 10.6 – 35.8 µm wide. Columellae subglobose to globose, smooth, hyaline, 5.0 – 11.5 µm long, 7.5 – 17.0 µm wide. Apophyses distinct, funnel-shaped, hyaline, slightly pigmented, 4.0 – 8.8 μm high, 2.1 – 4.5 µm wide at the base, and 5.0 – 17.6 µm wide at the top. Projections mostly pacifier-like, 0.7 – 6.5 µm long, 1.5 – 3.6 µm wide. Collars present or absent; if present, 1.8 – 4.9 µm long. Sporangiospores cylindrical, slightly concave in the center, smooth, hyaline, 2.8 – 4.5 µm long, 1.4 – 2.7 µm wide. Chlamydospores absent. Zygospores not found.	en	Ding, Zi-Ying, Ji, Xin-Yu, Tao, Meng-Fei, Jiang, Yang, Liu, Wen-Xiu, Wang, Yi-Xin, Meng, Zhe, Liu, Xiao-Yong (2025): Unveiling species diversity within early-diverging fungi from China IV: Four new species of Absidia (Cunninghamellaceae, Mucoromycota). MycoKeys 119: 29-46, DOI: 10.3897/mycokeys.119.147816
79183AF77CB85EE0AADEA2475353FAE9.taxon	description	Culture characteristics. Colonies on PDA in darkness at 25 ° C for 7 days, growing slowly, reaching 79 mm in diameter, indicating an average growth rate of approximately 10.3 – 11.2 mm / d, hyaline at first, gradually becoming brown, irregular concentric ring zonate, petaloid, irregular at reverse.	en	Ding, Zi-Ying, Ji, Xin-Yu, Tao, Meng-Fei, Jiang, Yang, Liu, Wen-Xiu, Wang, Yi-Xin, Meng, Zhe, Liu, Xiao-Yong (2025): Unveiling species diversity within early-diverging fungi from China IV: Four new species of Absidia (Cunninghamellaceae, Mucoromycota). MycoKeys 119: 29-46, DOI: 10.3897/mycokeys.119.147816
D84EC28E3286588395F74C338F37FA0D.taxon	description	Fig. 3	en	Ding, Zi-Ying, Ji, Xin-Yu, Tao, Meng-Fei, Jiang, Yang, Liu, Wen-Xiu, Wang, Yi-Xin, Meng, Zhe, Liu, Xiao-Yong (2025): Unveiling species diversity within early-diverging fungi from China IV: Four new species of Absidia (Cunninghamellaceae, Mucoromycota). MycoKeys 119: 29-46, DOI: 10.3897/mycokeys.119.147816
D84EC28E3286588395F74C338F37FA0D.taxon	etymology	Etymology. The epithet simplex (Lat.) refers to the simple branching pattern of sporangiophores.	en	Ding, Zi-Ying, Ji, Xin-Yu, Tao, Meng-Fei, Jiang, Yang, Liu, Wen-Xiu, Wang, Yi-Xin, Meng, Zhe, Liu, Xiao-Yong (2025): Unveiling species diversity within early-diverging fungi from China IV: Four new species of Absidia (Cunninghamellaceae, Mucoromycota). MycoKeys 119: 29-46, DOI: 10.3897/mycokeys.119.147816
D84EC28E3286588395F74C338F37FA0D.taxon	description	Description. Hyphae branched, hyaline when young, light brownish when old, aseptate initially, septate with age. Stolons branched, smooth, hyaline, brownish, septate, 2.5 – 10.0 µm in diameter. Rhizoids finger-like, hyaline, poorly developed, mostly unbranched, occasionally simply branched. Sporangiophores arising from stolons, erect or slightly bent, commonly monopodial, unbranched or branched 1 – 2 times, never in whorls, hyaline, 6.2 – 359.2 µm long, 2.3 – 4.9 µm wide, with a septum 10.3 – 16.1 µm below apophyses, occasionally with a swelling below a septum. Sporangia globose to pyriform, multi-spored, subhyaline, smooth, deliquescent-walled, colorless when juvenile, dusky brown when old, 8.5 – 31.6 µm long, 8.8 – 26.1 µm wide. Columellae globose, subglobose, conical, smooth, subhyaline or hyaline, 2.1 – 10.2 µm long, 5.6 – 14.7 µm wide. Apophyses obvious, funnel-shaped, subhyaline or hyaline, slightly pigmented, 2.8 – 6.8 μm high, 1.7 – 3.4 µm wide at the base, and 5.0 – 14.8 µm wide at the top. Projections mostly cylindrical, always present, rarely absent, subhyaline or hyaline, 1.0 – 2.8 µm long, 0.8 – 2.2 µm wide. Collars present or absent; if present, 1.3 – 4.8 µm long. Sporangiospores cylindrical, oval, slightly concave in the center, smooth, hyaline, 2.2 – 6.2 µm long, 1.7 – 3.6 µm wide. Chlamydospores absent. Zygospores not found.	en	Ding, Zi-Ying, Ji, Xin-Yu, Tao, Meng-Fei, Jiang, Yang, Liu, Wen-Xiu, Wang, Yi-Xin, Meng, Zhe, Liu, Xiao-Yong (2025): Unveiling species diversity within early-diverging fungi from China IV: Four new species of Absidia (Cunninghamellaceae, Mucoromycota). MycoKeys 119: 29-46, DOI: 10.3897/mycokeys.119.147816
D84EC28E3286588395F74C338F37FA0D.taxon	description	Culture characteristics. Colonies on PDA at 25 ° C for 7 days, reaching 60 mm in diameter, indicating an average growth rate of approximately 7.8 – 8.6 mm / d, hyaline initially, light brownish when old, irregularly concentrically zonate with ring, sporadically petalous at margin, irregular in reverse.	en	Ding, Zi-Ying, Ji, Xin-Yu, Tao, Meng-Fei, Jiang, Yang, Liu, Wen-Xiu, Wang, Yi-Xin, Meng, Zhe, Liu, Xiao-Yong (2025): Unveiling species diversity within early-diverging fungi from China IV: Four new species of Absidia (Cunninghamellaceae, Mucoromycota). MycoKeys 119: 29-46, DOI: 10.3897/mycokeys.119.147816
1B24DFA6D8DC5D62BB7DD43D5AC13598.taxon	description	Fig. 5	en	Ding, Zi-Ying, Ji, Xin-Yu, Tao, Meng-Fei, Jiang, Yang, Liu, Wen-Xiu, Wang, Yi-Xin, Meng, Zhe, Liu, Xiao-Yong (2025): Unveiling species diversity within early-diverging fungi from China IV: Four new species of Absidia (Cunninghamellaceae, Mucoromycota). MycoKeys 119: 29-46, DOI: 10.3897/mycokeys.119.147816
1B24DFA6D8DC5D62BB7DD43D5AC13598.taxon	etymology	Etymology. The sphaerica (Lat.) refers to the spherical columellae.	en	Ding, Zi-Ying, Ji, Xin-Yu, Tao, Meng-Fei, Jiang, Yang, Liu, Wen-Xiu, Wang, Yi-Xin, Meng, Zhe, Liu, Xiao-Yong (2025): Unveiling species diversity within early-diverging fungi from China IV: Four new species of Absidia (Cunninghamellaceae, Mucoromycota). MycoKeys 119: 29-46, DOI: 10.3897/mycokeys.119.147816
1B24DFA6D8DC5D62BB7DD43D5AC13598.taxon	description	Description. Hyphae branched, hyaline at first, light brown when mature, aseptate when young, septate with age. Stolons branched, smooth, hyaline, septate, 6.3 – 10.1 µm in diameter. Rhizoids root-like, hyaline, rarely branched, occasionally with a swelling. Sporangiophores beginning with stolons, erect or slightly bent, single or 2 – 5 in whorls, unbranched or branched 1 – 2 times, hyaline, 11.7 – 171.0 µm long, 2.7 – 4.6 µm wide, with one to two septa 6.4 – 18.2 µm below apophyses. Sporangia spherical, pear-shaped, multi-spored, smooth, deliquescent-walled, colorless in youth, pigmented when old, 6.9 – 37.0 µm long, 6.6 – 30.9 µm wide. Columellae globose, subglobose, smooth, hyaline, 1.2 – 20.2 µm long, 3.5 – 20.9 µm wide. Apophyses funnel-shaped, hyaline, slightly pigmented, 5.4 – 14.3 μm high, 1.3 – 5.0 µm wide at the base, and 3.3 – 16.3 µm wide at the top. Projections evident, strip-shaped, papillary, or pacifier-like, 2.0 – 7.3 µm long, 1.5 – 3.6 µm wide. Collars present or absent; if present, 1.4 – 6.4 µm long. Sporangiospores mostly cylindrical, occasionally globose, smooth, hyaline, 2.7 – 3.6 µm long, 1.2 – 2.2 µm wide. Chlamydospores absent. Zygospores not found.	en	Ding, Zi-Ying, Ji, Xin-Yu, Tao, Meng-Fei, Jiang, Yang, Liu, Wen-Xiu, Wang, Yi-Xin, Meng, Zhe, Liu, Xiao-Yong (2025): Unveiling species diversity within early-diverging fungi from China IV: Four new species of Absidia (Cunninghamellaceae, Mucoromycota). MycoKeys 119: 29-46, DOI: 10.3897/mycokeys.119.147816
1B24DFA6D8DC5D62BB7DD43D5AC13598.taxon	description	Culture characteristics. Colonies on PDA at 25 ° C for 7 days, reaching 79 mm in diameter, exhibiting an average growth rate of approximately 10.2 – 11.3 mm / d, hyaline at first, light brown when mature, regular in reverse.	en	Ding, Zi-Ying, Ji, Xin-Yu, Tao, Meng-Fei, Jiang, Yang, Liu, Wen-Xiu, Wang, Yi-Xin, Meng, Zhe, Liu, Xiao-Yong (2025): Unveiling species diversity within early-diverging fungi from China IV: Four new species of Absidia (Cunninghamellaceae, Mucoromycota). MycoKeys 119: 29-46, DOI: 10.3897/mycokeys.119.147816
D05EA14ACB3F5BB7A6BCF3EB95BC16FA.taxon	description	Fig. 4	en	Ding, Zi-Ying, Ji, Xin-Yu, Tao, Meng-Fei, Jiang, Yang, Liu, Wen-Xiu, Wang, Yi-Xin, Meng, Zhe, Liu, Xiao-Yong (2025): Unveiling species diversity within early-diverging fungi from China IV: Four new species of Absidia (Cunninghamellaceae, Mucoromycota). MycoKeys 119: 29-46, DOI: 10.3897/mycokeys.119.147816
D05EA14ACB3F5BB7A6BCF3EB95BC16FA.taxon	etymology	Etymology. The viridis (Lat.) refers to the light green colony on PDA.	en	Ding, Zi-Ying, Ji, Xin-Yu, Tao, Meng-Fei, Jiang, Yang, Liu, Wen-Xiu, Wang, Yi-Xin, Meng, Zhe, Liu, Xiao-Yong (2025): Unveiling species diversity within early-diverging fungi from China IV: Four new species of Absidia (Cunninghamellaceae, Mucoromycota). MycoKeys 119: 29-46, DOI: 10.3897/mycokeys.119.147816
D05EA14ACB3F5BB7A6BCF3EB95BC16FA.taxon	description	Description. Hyphae branched, hyaline at first, light green when mature, aseptate when young, septate with age. Stolons branched, smooth, hyaline, brownish, septate, 7.8 – 12.1 µm in diameter. Rhizoids finger-like, rarely present, hyaline, unbranched. Sporangiophores arising from stolons, erect or slightly bent, single or 2 – 4 in whorls, unbranched or branched 1 – 2 times, hyaline, 9.7 – 472.5 µm long, 6.5 – 10.7 µm wide, with a septum 10.4 – 18.3 µm below apophyses. Sporangia circular, elliptic, multi-spored, smooth, deliquescent-walled, colorless in youth, pigmented when old, 21.0 – 59.6 µm long, 17.7 – 51.4 µm wide. Columellae mostly spherical, occasionally hemisphere, conical, smooth, hyaline, 8.7 – 28.4 µm long, 11.1 – 31.7 µm wide. Apophyses funnel-shaped, hyaline, slightly pigmented, 5.4 – 14.3 μm high, 6.8 – 18.3 µm wide at the base, and 12.2 – 26.5 µm wide at the top. Projections evident, mostly strip-shaped, 2.2 – 7.8 µm long, 1.6 – 5.9 µm wide. Collars present or absent; if present, 5.4 – 10.2 µm long. Sporangiospores cylindrical, smooth, hyaline, 2.1 – 4.2 µm long, 1.6 – 3.1 µm wide. Chlamydospores absent. Zygospores not found.	en	Ding, Zi-Ying, Ji, Xin-Yu, Tao, Meng-Fei, Jiang, Yang, Liu, Wen-Xiu, Wang, Yi-Xin, Meng, Zhe, Liu, Xiao-Yong (2025): Unveiling species diversity within early-diverging fungi from China IV: Four new species of Absidia (Cunninghamellaceae, Mucoromycota). MycoKeys 119: 29-46, DOI: 10.3897/mycokeys.119.147816
D05EA14ACB3F5BB7A6BCF3EB95BC16FA.taxon	description	Culture characteristics. Colonies on PDA at 25 ° C for 7 days, reaching 80 mm in diameter, exhibiting an average growth rate of approximately 9.0 – 11.4 mm / day, hyaline at first, light green when mature, regular in reverse.	en	Ding, Zi-Ying, Ji, Xin-Yu, Tao, Meng-Fei, Jiang, Yang, Liu, Wen-Xiu, Wang, Yi-Xin, Meng, Zhe, Liu, Xiao-Yong (2025): Unveiling species diversity within early-diverging fungi from China IV: Four new species of Absidia (Cunninghamellaceae, Mucoromycota). MycoKeys 119: 29-46, DOI: 10.3897/mycokeys.119.147816
