Voss, et al. (1998) consider this taxon the subspecies H. corona corona.

1. Head
   
   1. Beaks: Descriptions can be found here: Lower beak; upper beak.
      
      
2. Photophores
   1. Head photophores Type 2a (e.g,. 2 photophores in Midline Series, 3 in Basal Arm IV Row).
3. Suckers
   1. Sucker rings on arms IV with many low, square teeth on entire margin or only on distal margin.
   2. Rings on enlarged median suckers of manus with 33-38 triangular or narrow pointed teeth.

Comments

More details of the description can be found here.

Species of the corona-group are distinguished by the following characteristics:

1. Photophores
   1. Type 2 head-photophore pattern (e.g., 2 Midline Series photophores, 3 or 4 Basal Arm IV Row photophores and no rogue photophore) .
   2. Basal Row with 7 photophores.
   3. Right Basal Series present.
   4. Arms IV without separate series of compound photophores at arm tip.
   5. Compound photophores on anterior half of ventral mantle uniform in size.
2. Arms
   1. Suckers with smooth rings on arms I-III except at distal ends and occasionally on basal suckers.
   2. Suckers of arms IV with dentition.
3. Tubercles
   1. Absent

The following table compares differences among members of the corona-group. H. cerasina and H. corona are very similar but occupy different oceans.

Character	Photophores Arms IV No. of series	Suckers Dentition Manus, large
H. corona	3	33-38
H. berryi	4	28-34
H. cerasina	3	40-60

Except for the analysis of head photophores, this description is from Voss (1969) and Voss, et al. (1998).

European waters (ERMS scope), Gulf of Mexico, Portuguese Exclusive Economic Zone, Spanish Exclusive Economic Zone

circum-(sub)tropical

Geographical distribution

Type locality: 29°10'N, 88° 00'W. H. corona is found only in the Atlantic Ocean et al., 1998).

mesopelagic

Depth range based on 50 specimens in 3 taxa.
Water temperature and chemistry ranges based on 41 samples.

Environmental ranges
  Depth range (m): 7.5 - 2204
  Temperature range (°C): 2.894 - 21.403
  Nitrate (umol/L): 0.189 - 39.114
  Salinity (PPS): 33.924 - 36.622
  Oxygen (ml/l): 1.868 - 6.230
  Phosphate (umol/l): 0.034 - 2.761
  Silicate (umol/l): 0.829 - 104.871

Graphical representation

Depth range (m): 7.5 - 2204

Temperature range (°C): 2.894 - 21.403

Nitrate (umol/L): 0.189 - 39.114

Salinity (PPS): 33.924 - 36.622

Oxygen (ml/l): 1.868 - 6.230

Phosphate (umol/l): 0.034 - 2.761

Silicate (umol/l): 0.829 - 104.871
 
Note: this information has not been validated. Check this *note*. Your feedback is most welcome.

Males are known to be mature at 110-188 mm ML; female size at maturity is unknown, largest female is 168 mm ML. Large, maturity-related, simple photophores absent (Voss, et al., 1998).